| Pyridine in water was determined by gas chromatography mass spectrometry (P/T-GC/MS) with purge and trap or by high performance liquid chromatography (HPLC). Linearity of P/T-GC/MS ranged from 0.05 mg/L to 4.00 mg/L, detection limits 0.008 mg/L, precisions 0.9%~11.5%, accuracy 81.6%~101%. Linearity of HPLC ranged from 0.05 mg/L to 10 mg/L, detection limits of HPLC 0.022 mg/L at the 194 nm, and 0.009 mg/L at 254 nm, precision of HPLC at 194 nm 0.6%~13.7%, and 0.04%~2.4% at 254nm, accuracy 99.4%~102% at 194 nm and 82.0%~104% at 254 nm. Both the two methods were able to meet surface water quality monitoring requirements. Method of P/T-GC/MS was more accurate for detecting clean water, and more convenient in the identification of unknown pollutant samples than HPLC. Method of HPLC was fast, suitable for analysis tasks with large number of samples. |
