ASTM International

Standard Test Method for Determination of 4-Carboxybenzaldehyde and p-Toluic Acid in Purified Terephthalic Acid by Reverse Phase High Performance Liquid Chromatography
 N D7884

Annotation

This test method covers the determination of the 4-Carboxybenzaldehyde (4-CBA) and p-Toluic acid (p-TOL) in purified terephthalic acid (PTA) by reverse phase high performance liquid chromatography (HPLC). This method is applicable for 4-CBA from 2 to 500 mg/kg and for p-TOL from 10 to 500 mg/kg, respectively.

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.

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 Высокоэффективной Жидкостной хроматографией Обращенной фазы

Этот метод тестирования покрывает определение 4-Carboxybenzaldehyde и p-Toluic кислоты (с 4 CBA) (p-TOL) в очищенной terephthalic кислоте (PTA) высокоэффективной жидкостной хроматографией (HPLC) обращенной фазы. Этот метод применим для с 4 CBA от 2 до 500 мг/кг и для p-TOL от 10 до 500 мг/кг, соответственно.