Research Report RR:D16-1049
An interlaboratory study was conducted by one laboratory that tested one PTA sample and one qualified terephthalic acid (QTA) sample for 4-CBA and p-TOL which was used to establish a precision statement for test method D7881.
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
Committee D16 on Aromatic, Industrial, Specialty and Related Chemicals
Subcommittee D16.02 on Oxygenated Aromatics