ASTM D Standard Test Method for Coulometric and Volumetric Determination of Moisture in Plastics Using the Karl Fischer Reaction (the Reaction of. ASTM D – 03() standard test method for coulometric and volumetric determination of moisture in plastics using the karl fischer reaction (the reaction of. ASTM D Standard Test Method for Coulometric and Volumetric Determination of Moisture in Plastics Using the Karl Fischer Reaction.
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Moisture Content by Karl Fischer ASTM D
Water content in percent or parts per million is determined. This eliminated the odor problem associated with pyridine. Since completing multiple co-op Calibration and Standardization It can be more accurate than simple weight loss because in the weight loss method volatiles other than water can be lost which is translated into an artificially high water content. astn
If the cell potential asfm a negative value, indicating that the anode solution contains excess iodine, add approximately 50 to ? Moisture Content by Karl Fischer. Determination of the moisture present is made using the reaction of I2 with water. Sample size shall be adjusted to obtain an accurate moisture measurement. Originally approved in Karl Fischer is used to determine the water content of samples.
Their electrode detects the current generated during the titration. Keep the carrier gas?
Selection of Optimum Heating Temperature is discussed below. Halogenated alcohols especially tri? If and when interlaboratory data are obtained, a precision statement will be added at a subsequent revision. The following table lists recommended atm weights for various moisture ranges: Stir the solution for a minute in the Titration Mode to dry and stabilize the inner atmosphere.
Precision and Bias If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. A volumetric burette adds iodinecontaining reagent to the titration cell until zstm more current is generated.
Moisture Content by Karl Fischer
The solutions must be light amber in color. Standards can be obtained from appropriate standards authorities.
It involves the determination of oxidizability, also known as oxygen O2 demand, by potassium permanganate ISO method The new analyzer offers an updated modular design that eases routine maintenance and features measurement ranges from 2ppm to percent and limits of detection It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
The current or volume required to generate the iodine converts to micrograms of water present. NOTE 3—The condition of both anode and cathode solutions are determined by the appearance of the? To request a quote for this test or others Click Here. Users of this standard are expressly advised that determination of the validity of s6869 such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
It was not widely used because of the objectionable odor of pyridine. It is permissible to use similar hydrates to check instrument performance. NOTE 2—Hydranal or similar anode and cathode solutions are recommended. The permanganate index is an assessment of water quality asgm used s6869 freshwater and treated drinking waters. Jena, September 26, — 24 hours of continuous operation, samples, without monitoring and in minimum space: Sample weight to be used is dependent on the amount of moisture expected in asfm sample.
Sample containers must be adequately dried and the environment in which sampling is performed must not add additional moisture to the sample. The instrument is now ready for sample analysis.