ASTM International - ASTM D7881-13
Standard Test Method for Determination of 4-Carboxybenzaldehyde and p -Toluic Acid in Purified Terephthalic Acid by Capillary Electrophoresis with Reverse Voltage Mode
Organization: | ASTM International |
Publication Date: | 15 August 2013 |
Status: | inactive |
Page Count: | 7 |
ICS Code (Organic acids): | 71.080.40 |
significance And Use:
5.1 The presence of 4-CBA and p-TOL in PTA used for the production of polyester is undesirable because they can slow down the polymerization process; and 4-CBA is also imparting coloration... View More
scope:
1.1 This test method2 covers the determination of 4-carboxybenzaldehyd
1.2 In determining the conformance of the test results using this method to applicable specification, results shall be rounded off in accordance with the rounding-off method of Practice E29.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.
Document History



