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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Selection of Optimum Heating Temperature is discussed below.
Originally approved in Be the first to comment! It is permissible to use similar hydrates to check instrument performance. The moisture collected in the solution within the titration cell is determined using the reaction of water with I2. No comments were found for ASTM D – 03 standard test method for coulometric and volumetric determination of moisture in plastics using the karl fischer reaction the reaction of iodine with water.
This apparatus has the capability to generate or deliver iodine to react stoiciometrically with the moisture present in the titration cell.
Moisture Content by Karl Fischer ASTM D
Record the sample weight. The new analyzer offers an updated modular design that eases routine maintenance and features measurement ranges from 2ppm to percent and limits of detection The instrument is now ready for sample analysis.
It was not widely used because of the asrm odor of pyridine. A temperature value too high can degrade the polymer and actually generate water in some cases. Determination of the moisture present is made using the reaction of I2 with water. Prepare the instrument as detailed in Section Karl Fischer is used to determine the water content of samples.
Knowledge of the moisture content can be important since some d8669 degrade when molded wet resulting in reduced properties. Low moisture with high temperature causes polymerization. Move the sample boat into the oven and begin analysis. If the cell potential shows a negative value, indicating that the anode solution contains excess iodine, add approximately 50 to ?
The time and temperature values are arrived at by testing a similar material and varying the temperature and bake time independently to determine optimal conditions asym removal of all water in the sample.
Preparation of Apparatus The current or volume required to generate the iodine converts to micrograms of water present.
The new Thermo Scientific SOLA iQ online sulfur analyzer helps technicians, engineers and managers in the oil and gas industry measure total sulfur content of liquid or gas phase samples without requiring time-consuming lab analysis. High moisture content causes surface imperfections that is, splay or bubbling or degradation by hydrolysis. What is permanganate index? If and when interlaboratory data are obtained, a precision statement will be added at a subsequent revision.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Sample weight to be used is dependent on the amount of moisture expected in the sample. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
The volume of reagent that is added during the titration is measured and used to calculate the amount of moisture in the sample. Low moisture with high temperature causes polymerization. These reagents do not contain pyridine, are less toxic, and have no offensive odor. If the temperature is too low or the asgm time too short all of the water might not be driven off. One to three grams. The following table lists recommended sample weights for various moisture ranges: Permission rights to photocopy the standard may also be secured from the ASTM website www.
Water content in percent or parts per million is determined. Stir the solution for a minute asstm the Titration Mode to dry and stabilize the inner atmosphere. Volumetric instruments measure the volume of solution containing I2 that is required to keep the current constant.
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.
ASTM D – MOISTURE CONTENT BY KARL FISCHER
NOTE 3—The condition of both anode and cathode solutions are determined by the appearance of the? Heat the boat in the oven for 2 min, and then allow the boat to cool for 2 min prior to the introduction of samples.
To achieve this, the recommended Since completing multiple co-op Take care not to get excess moisture on the outside surface of the capillary.