ASHRAE Standard 160P__Criteria Learn how moisture analyzer is used to reliably measure the dry content in chemical industry. The mass of water is related to the number of water molecules (nW) by the following expression: mw= nwMw/NA, Over 6500 samples of cheese were analyzed in an effort to modify the current AOAC procedure. Weigh the empty dish and lid. >> Moisture Control Design Analysis in Buildings as defined by national food regulations). Which method should I use for moisture content determination? >> This method determines moisture content in massecuites, molasses, and other liquid and semiliquid products. Heating of sample through absorption of IR radiation from a halogen radiator. This white paper provides practical guidance on how to provide evidence that the results of the moisture analyzer are comparable to the drying oven and that the instrument is fit for purpose. 3. How are samples heated in the drying oven and in the moisture analyzer? Determination of Moisture Content is the most important proximate analysis. File size 71KB, NATIONAL HIGHWAYS AUTHORITY OF INDIA 4-Laning and Strengthening of Existing 2-Lane Road from Km 265.000 to 380.000 Dhule, JOB NO. It can be represented as w. Ww = Weight of water content present in the sample, Ws = Weight of solid particles present in the sample. Place the dish with sample in the oven. The moisture determination of rough rice by the air oven method with different drying temperatures and drying times was studied. Here are some of the methods for determining the moisture content of foods and beverages: Oven Drying. According to the standards, the minimum amount of soil sample can be taken for the test performance through this table. Immediately connect flask to digestion bulb on condenser and with tip of condenser immersed in standard acid and 5-7 drops of mix indicator in receiver. Literature: White Papers, Guides, Brochures. bjbj 6N j j F $ l : : : 8 r $ \ o&. Equipment upgrades from the existing AOAC standard methods provide safer more efficient methods of analysis. Weigh the empty dish and lid. All pans must be pre-dried for at least 3 h at 100C, and the glass fiber covers should be pre-dried for 1 h under the same conditions. The drying oven method is a thermogravimetric method (loss on drying) in which the sample is dried for a defined period of time at constant temperature. 7 0 obj 141 ANALYTICAL METHODS 1 Determination of moisture content AOAC 2000 Method 1 Dry the empty dish and lid in the oven at 105 C for 3 h and transfer to desiccator to. /ProcSet [ /PDF /Text /ImageC ] >> The method of 105C for 72 h had the smallest standard deviation of the six . Please turn on JavaScript and try again. /Im0 21 0 R We have to use the standard method with the drying oven but using a moisture analyzer would really speed up our processes. So, moisture content can be determined as: Moisture content = [(W2 W3) / (W3 W1)] * 100. The gravity atmospheric oven was unsuitable for use in accurate moisture analysis because of wide temperature differentials within the oven cavity. cross-validating it against the drying oven. 0 /img0 73 0 R To determine the amount of low molecular weight volatile material in most fats and oils. There are many stages of the production process where moisture determination benefits the overall quality of the finished product: raw materials, goods-in, storage, in process control, QC, packaging, etc. 3. >> /Parent 1 0 R The use of mid-infrared milk analyzers to determine fat, protein, lactose, and total solids in milk (AOAC Method 972.16) is covered in Chap. /Font << To find a suitable moisture method you need to understand the characteristics of your sample and choose suitable method parameters such as the drying program, drying temperature and switch-off criterion, as well as appropriate sample preparation. 124 Analytical Methods 1 Moisture content AOAC 1999 Method 1 Dry the empty dish and lid in the oven at 105C for 3 h and transfer to desiccator to cool. The Sample should be dried in stainless steel containers. Results are delivered in 5-15 minutes, in contrast to the drying oven, which typically takes 2-3 hours. Fast analysis with the moisture analyzer is done to optimize processes and the drying oven is used for official documentation purposes. Is it possible? Moisture affects the processability, shelf life, usability and quality of many products such as pharmaceutical substances, plastics and foods. A moisture content determination model for an air oven was developed to describe the effect . Based on the target moisture content and a measurement using the proposed method from step 1, the temperature assistant refines the method and proposes an optimized drying temperature for the sample. Learn how we and our ad partner Google, collect and use data. To determine the gradient of the line joining the given staff stations A and B and to find the Reduced Level of station B. The remaining dry mass is weighed to determine the loss in mass. All you need to know about moisture content determination is here: free industry-specific guides, e-learnings, and moisture content analysis FAQ. Which technique should I use for moisture content determination? After the cooling of the sample, again weigh the sample with the container and take it as W3. Dry for 3 h. at 105C. The total fat. Weigh the crucible and lid to 3 decimal places. Check our proven and well-tested moisture methods in our application library to get a suitable starting point for your own method development. The loss on drying procedure can be used to determine moisture content (MC) or, alternatively, dry content (DC). /Resources << 4. Place the dish with sample in the oven. 3. 3. This requires developing a drying method for the moisture analyzer andcross-validating it against the drying oventhrough a series of analyses. The dry content remaining may be termed the total solids (TS). Please reload the page. Use of this for oven moisture determination resulted in higher variance, which corresponded to the high temperature variation within the oven. After calculating the moisture content of each sample, we also have to find the average value to get the accurate value of moisture content. From interpreting technical specifications to understanding the functionality and performance of the instrument from a holistic point of view. 579 0 obj <>/Filter/FlateDecode/ID[<5016A717EDA88B47BDC2FE5D489B6DB4>]/Index[553 42]/Info 552 0 R/Length 121/Prev 268267/Root 554 0 R/Size 595/Type/XRef/W[1 3 1]>>stream This is either performed volumetrically, with the addition of the reagent measured, or coulometrically, where the reaction is driven in-situ and is proportional to electrical current applied. Heat over low Bunsen flame with lid half covered. The accuracy of results can be affected by temperature, relative humidity, amount of sample, particle size, and variation of temperature in the oven. The dry matter that remains after. Please reload the page. endobj Reweigh the bottle and its dried content. OwTq5:#rnsg/ The term "apparent moisture" is vised becavise oven drying also causes loss of volatile organic material. Dry the empty dish and lid in the oven at 105 C for 3 h and transfer to desiccator to cool. Place the crucible and lid in the furnace at 550C overnight to ensure that impurities on the surface of crucible are burned off. How can I avoid errors when I'm recording results and doing calculations? Determination of moisture in cheese and cheese products Variables related to oven-drying samples of cheese and cheese products to determine moisture content were examined to provide more efficient and reproducible methods. >> In this method, an oven is often used. 6 0 obj It is defined as the mass ratio of pore water to solids and generally expressed as a percentage that shows the amount of moisture content present in that soil sample. Furthermore, the maximum permissible moisture content in certain products may be governed by legislation (e.g., national food regulations). The method also describes a standardization procedure for a forced-air oven. TOTAL EVAPORABLE MOISTURE CONTENT OF AGGREGATE BY, Standard Method of Test for ContentsObjectiveTest Principle:Related TheoryBeam:Types of Supports for a BeamRoller Support:Hinge or Pin Support:Fixed Support:Types of LoadingConcentrated or Point Load:Uniformly, ContentsStandard UsedObjectiveRelated TheorySetting of Cement:Hardening of Cement:Initial Setting Time of Cement:Final Setting Time of Cement:Significance of determination of, ContentsObjective:Related theory:GradientReduce levelTheodoliteTacheometryTacheometerStadia RodPrinciple of TacheometryApparatus:Setting and Levelling of Theodolite:Procedure:CASE 1: When the line of sight is horizontalCASE, Determination of Moisture Content by Oven Drying Method, How to Choose an Interior Designer: Everything You Need to Know, Citrus Tree Magic: Transforming Your Home and Garden with Vibrant Citrus Trees, water content of materials contains extraneous materials that may require special treatment, determine the water content of the soil sample consists, initial and the final mass of test samples, Determination of Reactions on Simply Supported Beam. As moisture content the sample decreases, lower the lamp height gradually until mark 5-4.5. 6. 1 0 obj In our collection of moisture methods for the food industry, you'll find over 20 moisture determination methods for samples in the food and bakery industry. If you already have a reference value (e.g. Incubate the bottle at 80-90oC until solvent is completely evaporate and bottle is completely dry. 594 0 obj <>stream 4. ); (2) to compare the effects of dryingtemperature, time, and sample treatment in an air oven on the moisture content of pearl milletusing Cool down in the desiccator. Contact us if you don't find what you need. In general, all kinds of samples are suitable for both the drying oven and the halogen moisture analyzer. 2. 3. In the drying oven, samples are heated by convection. This method is not suitable for thermally unstable compounds. /Contents 72 0 R This procedure complies the AOAC 930.15 method.. Moisture content is the amount of moisture in the sample given as a percentage of the sample's original (wet) weight. These are the observations that contain the initial and the final mass of test samples. Weigh about 3 g of sample to the dish. Boil briskly until solution clears. 5% (w.b.). The temperature at which the sample is oven-dried ranges from 110oC +- 5oC. Dry for 3 h at 105C. Determination of ash content (AOAC, 2000) Method 1. /MediaBox [ 0 0 617 793 ] Calculate percentage moisture (wt/wt) as described below. In general there are two ways to find a suitable LOD method for your sample. >> 4. /T1_4 20 0 R Variables related to oven-drying samples of cheese and cheese products to determine moisture content were examined to provide more efficient and reproducible methods. METTLER TOLEDO's application database contains over 100 free ready-to-use cross-validated drying methods. hb``g``2a T, bPrm5i GDX40>] jL(6q@ Routine testing of the heating and weighing unit are therefore necessary to ensure reliable determination of the moisture content and correct functioning of the instrument. 2. This test is performed on soil samples and entails the following objectives: The moisture content is one of the most common properties in characterizing the engineering behavior in soils. The moisture content of a food material is defined through the following equation: %Moisture = (mw/msample)100 Where mwis the mass of the water and msampleis the mass of the sample. 3. 6. If you own a METTLER TOLEDO moisture analyzer (HX204, HS153 or HC103) use the integratedMethod Wizardfunctionality that guides you step-by-step to a reliable moisture method with minimum effort. If your batch number is a barcode, you can even connect a barcode reader to scan it, or any other ID. I am using the drying oven procedure. Oxford University Press is a department of the University of Oxford. Often reference procedure (for historical reasons this procedure often forms part of legislation) Several samples can be determined at the same time Large sample volumes possible, Very long determination period (hours) Substances other than water may evaporate Prone to errors because of the high level of manual handling and calculations involved Unsuitable for at-line use - requires analytical balance and dessicator. AOAC Official Method 984.20 Loss on Drying (Moisture) and Volatile Matter in Oils and Fats: Karl Fisher Method. Spread the sample to the uniformity. /Rotate 0 Connectivity Software solutions Data flow from one instrument to another, Productivity (released time from the team) Uptime Optimize processes, Reduction in operating costs Total cost of ownership Maintenance cost reduction, Shift to the next level measurement process (from manual to automated, or to on-line measurement; automation), Sustainable design (futureproof modular design long lasting), Time reduction quick adjustment and scalability of methods, User skills and knowledge (theory of applications, technologies, methods, tips and tricks), Metal, Plastic and Electronics Components, Download the Free Guide to Moisture Analysis, Take our Free Moisture Analysis e-Learning, Learn more about accessories and consumables. The method is accurate but time consuming. This alternative method to the drying oven procedure reliably measures the moisture content in a fast and easy manner. 3. The method is not applicable to naphtha extraction greases that contain solvents of fairly high boiling point that are driven off with difficulty. Good labelling is key. Many industry regulations require manufacturers to follow a standard method. 3. . /T1_0 16 0 R The difference in weight of a sample after drying tells how much moisture the sample originally contained. 2. /Contents [ 8 0 R 9 0 R 10 0 R 11 0 R 12 0 R 13 0 R 14 0 R 15 0 R ] Add 40 ml of chloroform and homogenize for 30 sec. Precise determination of Total Solids in wastewater is a key driver for the operational efficiency of wastewater treatment facilities. The moisture content is determined by weighing the sample before and after drying and determining the difference. 1. Our partners will collect data and use cookies for ad targeting and measurement. /Annots 71 0 R ->4TOCn~^K da'PTl>LZ9S,{C_B3j}ng`&[Fm/]5{ eBpa}[=Y*B*e@B50r1M=?[m5!a.f C. AASHTO T 217 This method determines moisture content in cereals, legume grains, and a number of other commodities for which conversion tables are available. Heating of sample by convection. Dry the empty dish and lid in the oven at 105C for 3 h and transfer to desiccator to cool. jB`FJxjcB qv4;>[%5YR0IM@w}z@rBVcm] +JH"yuMOol/T/2k0e^O!r;U:,iS4-U.l#T0p+ar6=8XKBk4tEV[NMPsW7aga $'X%rmOLN`&}C|jh$pOF!.+_t!` \,zLzLH11d,(Lir=IcWuN( _,-aYS1.ma9'Haflm2DeG d05a`N^]FPj/ Prepare a tube containing the above chemical except sample as blank. %PDF-1.5 % Using the right method for a moisture analysis is crucial to achieve repeatable results, which are comparable to the reference procedure (typically the drying oven). T-x- JLAy(H!V'8s6 - Fe~<> Consult ourreference paper, which guides you through the setup of a robust moisture method for your sample, including the right sample preparation and sample application. Place in a forced draft oven at 100C for 3 h. 5. LabX saves everything in a secure database so you can be sure your data is safe. /Annots 7 0 R /CropBox [ 0 0 617 792 ] 105C. With lids removed, dry sample containing ca 2 g dry material to constant weight (2-4 h depending on product) in mechanical convection oven or in gravity oven with single shelf at ca 125q. Moisture content = (weight of moisture / weight of dry soil) * 100%, Weight of moisture = (Weight of container + wet soil) (Weight of container + dry soil), Weight of dry soil = (Weight of container + dry soil)) (Weight of empty container). SCOP. H2SO4 3. In general, all kinds of samples are suitable for both the drying oven and the halogen moisture analyzer. Other attributes and requirements are also covered. It's not only much faster but it's error-free too. 7. The moisture method datasheets describe method parameters, including sample preparation, for both the moisture analyzer and the reference method (e.g. It is also applicable to flour mixes containing NaHCO(3) and yeast foods. There was an error retrieving our menu. endobj It is applicable to high-fat, low-fat, and defatted soy flours. This method is recommended for determination of moisture only and not for moisture and volatile matter. >> Weigh about 3 g of sample to the dish. Determination of fat content (AOAC, 2000) Reagents - Petroleum ether Method 1. The oven drying and moisture balance methods are used when water is the only volatile material present and is in significant quantities, and the activated . Moisture content affects the processibility, shelf-life, usability and quality of a product. 4. 5 0 obj The results are in close agreement with those obtained by Method 44-40.01 (vacuum-oven). Heat insulated pad should always be used. << 141 How are samples heated in the drying oven and in the moisture analyzer? After that, the sample is placed in a thermostatically drying oven that is maintained at a temperature of 110, A period of 16 to 24 hours is sufficient but it also varies with the. /XObject << /Resources << When compared with the same samples dried to constant weight in an atmospheric oven at 100C the vacuum dried product will show a 10 to 50% greater loss of weight depending on carbohydrate content. The oven-dry method helps to decompose some organic materials at a standard temperature of 110oC. stream endobj Calculation Protein (%) = (A-B) N 1.4007 6.25 W Where A = volume (ml) of 0.2 N HCl used sample titration B = volume (ml) of 0.2 N HCl used in blank titration N = Normality of HCl W = weight (g) of sample 14.007 = atomic weight of nitrogen 6.25 = the protein-nitrogen conversation factor for fish and its by-products 3. 2. The sample's temperature and drying time depends on its absorption characteristics. The sample's temperature and drying time depends on its absorption characteristics. hbbd```b``3ddf5 )D "glJ!01 I&(H.Q}@Rvb3})"LL;@"@T#30` l 9. The method determines moisture content as the loss in weight of a sample when heated under specified conditions. This method is very simple and easy to understand. Information about and monitoring of moisture content is therefore very important. endobj To find a suitable LOD moisture method you need to understand the characteristics of your sample and choose suitable method parameters such as the drying program, drying temperature and switch-off criterion. However, it is acceptable to use a moisture analyzer if you can prove its results are the same as those from the drying oven procedure and are of the same level of accuracy. The moisture content is expressed either as a percent of the oven dry mass or of the as-received mass. The procedure to determine the water content of the soil sample consists of the following steps. > q s p [ ! 2. Place the bottle and lid in the incubator at 105oC overnight to ensure that weight of bottle is stable. Any combination of filter and full text search is possible. This means the samples are at the same temperature as the drying oven. 6. The LabX report generator enables you to create elegant reports with charts which can be printed out or saved electronically. 553 0 obj <> endobj This method determines moisture content in flour and semolina. 58 Special Properties of Fats, Oils, and Shortenings Methods, 48 Oxidizing, Bleaching, and Maturing Agents Methods, 66 Semolina, Pasta, and Noodle Quality Methods. /MediaBox [ 0 0 617 793 ] hb```5@(AcWe& ~?P#n Tsw`XKiPQD^-9Np1QT Take the sample into extraction thimble and transfer into soxhlet. It is defined as the mass ratio of pore water to solids and generally expressed as a percentage that shows the amount of moisture content present in that soil sample. Add 40 ml of distilled water and homogenize again for 30 sec. METTLER TOLEDO's application databasecontains over 150 free ready-to-use cross-validated drying methods. Where: M o is the mass of the empty dish with its lid and containing the asbestos, g. M 1 is the mass of the dish with its lid, asbestos and test portion before drying, g. M 2 is the mass of the dish with its lid after drying, g. The results are expressed to one decimal place. Heat at 550C overnight. 4. A METTLER TOLEDO instrument provides comparable and traceable results in less than 15 minutes. This method is primarily used to determine moisture content in feed. /ProcSet [ /PDF /Text /ImageC ] 144 Calculation Fat (%) = Weight of fat 100 Weight of sample 5. USP <731> ("Loss on Drying"), AOAC and ISO describe thethermogravimetric method using a drying oven as a standard procedure for determining moisture content. The mass of soil for the test performance is taken according to the grading of the soil. /T1_3 19 0 R 141 ANALYTICAL METHODS 1. . How to Ensure Reliable Moisture Analysis Results. They describe the amount of material remaining after all the moisture has been evaporated. DETERMINATION OF MOISTURE IN SOILS BY MEANS OF CALCIUM CARBID, EMBANKMENT AND BASE IN-PLACE DENSITY The method is not applicable for ensiled materials or for feeds containing urea or high sugar contents. Apparatus (see AOAC Official Method 934.06) 5.1 Analytical balance sensitive to 1 mg or better. (AOAC) 2020. Place the moist soil sample in the container and again weigh it using balance as W2. Recommended temperature is high enough to drive off most water content but low enough to minimize loss of other volatile compounds. Store in a desiccator until samples are weighed. Although, drying of a sample overnight is sufficient but if there is any doubt so the drying of the sample should be continued until the mass after two successive periods of drying does not indicate any change in the mass. 4. /Contents 23 0 R How do I develop a loss on drying method on my moisture analyzer for my substance? CALCULATION a) Results can be read directly from the balance scale or b) Calculate as in the oven method i.e . It is not applicable to ground wheat. The accuracy and moisture range that oven-drying techniques offer is very similar to other thermogravimetric methods. Our plastics method collection provides moisture methods for the most common plastic resins and compares them to the Karl Fischer titration method. . Robert L Bradley, Jr, Margaret A Vanderwarn, Determination of Moisture in Cheese and Cheese Products, Journal of AOAC INTERNATIONAL, Volume 84, Issue 2, 1 March 2001, Pages 570592, https://doi.org/10.1093/jaoac/84.2.570. A good moisture result heavily depends on a good and robust moisture method. It is not applicable to samples containing water-miscible volatile substances or to samples containing added monoglycerides. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide, This PDF is available to Subscribers Only. Place the dish with sample in the oven. 2 0 obj 4 0 obj Accurate moisture content determination therefore plays a key role in ensuring quality for many industries including Food, Pharmaceuticals and Chemicals. /Kids [ 3 0 R 4 0 R 5 0 R ] Weigh the empty the dish and lid. *PSoG;RMj)3S*82111 The procedure is applicable to chickpeas, lentils, peas, and all classes of beans with the exception of soybean. /MediaBox [ 0 0 617 792 ] The forced draft oven method is recommended for adoption as official, first action. USP 731 <loss on drying>, AOAC and ISO describe the thermogravetric method using a drying oven as a standard procedure for determining moisture content. These methods are not recommended for feeds and feedstuffs when fat determination is to be made on dried samples. Calculation Moisture (%) where: = (W1-W2) 100 W1 W1 = weight (g) of sample before drying W2 = weight (g) of sample after drying 2. Water content of the sample should be nearest to 1% or 0.1%. USP <731> ("Loss on Drying"), AOAC and ISO describe the thermogravimetric method using a drying oven as a standard procedure for determining moisture content. How can I put the batch number on the printout from my moisture analysis? Weigh the empty dish and lid. The moisture content percentage is determined from the difference in weight before and after drying. There is no one-size-fits-all method for moisture content . 2. CALIBRATON OF SPEEDY MOISTURE METER. During heating, do not cover the lid. All dried pans and covers must be stored in a desiccator with active desiccant. 5.2 Mechanical mill or food chopper Among oven-drying methods for moisture determination, a method that dries at 135C for 2 h (AOAC, 2005; method 930.15) is one of the most widely used procedures for feed moisture. In addition it is important to understand the best sample preparation method for fast and reliable measurements. % The accuracy of a moisture analysis result may be influenced by several factors. 3 Principle A known mass of butter is dried in the presence of pumice stone at 102 C 2 C. Alternatively, electrical devices, referred to as moisture meters or moisture testers, are employed. To develop a reliable moisture method the sample at hand therefore should be understood and a loss on drying method, including sample preparation and presentation, that fits the sample should be developed. Spread the sample with spatura. /Parent 1 0 R Weigh the empty dish and lid. The oven-dried mass is usually recorded after 12 to 24 hours. If the presence of low molecular weight fatty acids is suspected, it may be necessary to use other tests. The most important is variability of the heating temperature, followed by the weighing performance. The moisture content percentage is determined from the difference in weight before and after drying. Many industry regulations require manufacturers to follow a standard method. The oven-drying methodology consists of heating by convection with forced or circulating hot air. for Determination of lipid content (Bligh and Dyer, 1959) Reagents - Chloroform - Methanol Method 1. /Parent 1 0 R %%EOF Fast analysis with the moisture analyzer is done to optimize processes and the drying oven is used for official documentation purposes. Dry the empty dish and lid in the oven at 105C for 3 h and transfer to desiccator to cool. Abstract Variables related to oven-drying samples of cheese and cheese products to determine moisture content were examined to provide more efficient and reproducible methods. /XObject << Determination of moisture content (AOAC, 2000) Method 1. The moisture content is expressed as a percentage by mass. Dry the empty dish and lid in the oven at 105C for 3 h and transfer to desiccator to cool. Weigh about 3-5 g of sample to paper filter and wrap. The water content of materials contains extraneous materials that may require special treatment for the removal of these substances. Moisture Content represents the quality of any sample. Quick measurement (typically 5-15 min.) ZCW0.pnduzPJ10 nzH)2=s9 l\ The formula is often used in connection with tables in Methods 82-21.01, 82-22.01, and 82-23.01. Determination of Moisture Content of Food Products - Oven Drying Method RJ's Knowledge Channel 38 subscribers Subscribe 88 5.2K views 1 year ago This video shows the procedure on how to. In most cases, the moisture analyzer can deliver an equivalent loss on drying moisture result, and typically better repeatability, in much less time, making it a fast alternative to USP <731> ("Loss on Drying") and ASTM D6980 Standard Test Method for Determination of Moisture in Plastics by Loss in Weight and other industry standards. %PDF-1.5 % << When using a moisture analyzer, the sample heats up and dries by absorbing infrared radiation from the heating element. Determination of moisture content (AOAC, 2000) Method 1. /Length 1396 This is a common misconception. [emailprotected] /Rotate 0 44-20.01 MoistureASBC Air-Oven Method. Determination of moisture content (AOAC, 2000) Method 1. 2. However, it is acceptable to use a moisture analyzer if you can show its results are similar (accuracy and repeatability) to those from the drying oven procedure. endstream endobj 554 0 obj <. >> /T1_1 17 0 R Our Guide to Moisture Analysis provides information about the key points which are important for working with moisture analyzers and helps you to quickly, reliably and effortlessly determine moisture content. hWmo8+*+HHMfoJt=)-Z"`uhBal{a#" D2N$'B("IT ThMG8p'\K)`T>Q`K3AX`*pSFx*&84][ "q8_iXF%dt9',bvBNA:1@\M\ Or8\x($Q~U4 E4^+]v8*$`GoqXF/c$ METTLER TOLEDO is an expert in moisture analysis and offers a wide range of reliable and easy to use moisture analyzers to suit the needs of quality control, production and in-process control of many industries, such as pharma, plastics and the food industry. 2.2 Method B This is an alternative moisture method which removes the total moisture in two steps: (1) evaporation of moisture in air at room temperature (air-drying), and (2) the subsequent oven drying of the air-dried sample at . Results can be printed out for your lab journal or saved on a USB stick to be saved electronically. /T1_2 18 0 R Take a look at our range of moisture analysis instruments to discover which one best suits your company's needs. They should be corrosion resistant with a close-fitted lid so that it could prevent loss of moisture before the initial weighing. Loss on Drying. All rights reserved. It is the only non oven method that is approved by the AOAC for use with dried Safe Food Alliance offers an official maintenance program for the DFA Moisture Meter endstream endobj 11 0 obj <> endobj 12 0 obj <> endobj 13 0 obj <>stream /Type /Page One container is enough for each sample. If not, return the crucible and lid to the furnace for the further ashing. It should be thermostatically controlled and can operate at the temperature of 110oC +- 5oC (230 +- 9oF). The total moisture content of the undiluted samples, as received for the purposes of this study, was determined by AOAC Method 950.46 and ranged from 54.03 to 74.99%.
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