Determination of 5 Aromatic Amines in Environmental Water Sample by GC-MS with Dispersive Liquid-Liquid Microextraction

0.1 g of NaCl was added into 5 mL of water sample, and after dissolving, 50 μL of trichloromethane as extractant and 300 μL of acetone as dispersant were added and the mixture was centrifuged at a rotating speed of 4 000 r·min^-1 for 2 min. The 5 aromatic amines in the organic phase were determined by GC-MS, and the internal standard method was used for quantitative analysis. As shown by the results, linear relationships between the ratios of peak areas of 5 aromatic amines to peak areas of the internal standard and the mass concentration of 5 aromatic amines were found in definite ranges, with detection limits (3S/N) in the range of 0.000 1-0.001 5 mg·L^-1. Test for recovery was made by standard addition method on the base of actual blank water, giving results in the range of 94.7%-106%, and RSDs (n=6) were less than 5.0%.