Determination of Quinoline in Textiles by High-Performance Liquid Chromatography

Abstract

Abstract Quinoline, an important intermediate in rubber, fine chemicals, dyeing and finishing industry, is irritating to eyes and skin, and has the risk of carcinogenesis, teratogenesis and mutagenesis in organisms. At present, the research on quinoline mainly focuses on fine chemicals, pesticides, and pharmaceuticals, while the research on textiles is less. Up to now, the determination standard of quinoline content in textiles has not been issued in China and the international field. To establish a method for determination of quinoline in textiles by high-performance liquid chromatography (HPLC), the extraction conditions were optimized. The textile samples were ultrasonically extracted with acetonitrile as solvent. A 0.45 μm filter membrane was used to filter the extracts. The detection method was validated by methodology. The RSD of intra-day precision is 0.32% and the RSD of inter-day precision is 0.59%. Recoveries ranged from 90.6% to 98.9% with RSDs ranging from 0.4% to 2.14% (n=6) at low, medium and high spiked concentrations, which shows this method has stable detection results, high precision, and satisfactory recovery rate. 28 samples were tested with this method, and quinoline was detected in 1 sample, with a content of 5.3 mg/kg, which was less than the limit requirement for quinoline in 2019 OEKO-TEX Standard 100.