ASTM International

Standard Test Method for Determination of 4-Carboxybenzaldehyde and p-Toluic Acid in Purified Terephthalic Acid by Capillary Electrophoresis with Normal Voltage Mode
 N D7882

Annotation

This test method covers the determination of 4-carboxybenzaldehyde (4-CBA) and p-toluic acid (p-TOL) in purified terephthalic acid (PTA) by capillary electrophoresis (CE) with normal voltage mode and UV detection. It is applicable for 4-CBA from 5 to 400 mg/kg and for p-TOL from 10 to 400 mg/kg, respectively.

In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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.

Автоматический перевод:

Метод Стандартной пробы для Определения 4-Carboxybenzaldehyde и P-толуиловой-кислоты в Очищенной Терефталевой кислоте Капиллярным Электрофорезом с Нормальным Способом Напряжения

Этот метод тестирования покрывает определение 4-carboxybenzaldehyde и p-toluic кислоты (с 4 CBA) (p-TOL) в очищенной terephthalic кислоте (PTA) капиллярным электрофорезом (CE) с нормальным режимом напряжения и ультрафиолетовым обнаружением. Это применимо для с 4 CBA от 5 до 400 мг/кг и для p-TOL от 10 до 400 мг/кг, соответственно.