We report a simple and rapid analytical method for the determination of p-phenylenediamine in plastics,rubber,and textiles using liquid chromatography-mass spectrometry(HPLC-MS).After ultrasonic extraction with methanol,the sample was analyzed by HPLC-MS and quantified using an external standard calibration curve method.Under optimized conditions,the method can achieve separation and detection of p-phenylenediamine within 4 minutes,and the limit of detection is 0.33 mg/kg.The method has a good linear relationship with the content of p-phenylenediamine in the range of 1.0 mg/kg to 20.0 mg/kg,and the coefficient of regression is not less than 0.995.Three concentration levels of 1.0,5.0,and 20.0 mg/kg of p-phenylenediamine were spiked for plastic,rubber,and textile samples,and a relative standard deviation of 2.0%to 6.7%and a recovery rate of 81.6%to 92.2%were obtained.The proposed method is easy to operate,has a high recovery rate,and good reproducibility.Therefore,it can be used for the determination of p-phenylenediamine in large amount of consumer goods.
维普
万方数据