Determination of 11 Triazine Herbicides in Water by Solid Phase Extraction-High Performance Liquid Chromatography-Mass Spectrometry
A method was developed for detection of 11 triazine herbicides.After automatic solid-phase extraction and concentration,the extracts were separated by liquid chromatography and detected by mass spectrometry.Qualification was done according to retention time and quantitation was carried out by ion-pair.The method conditions were optimized before testing real samples from branch of the Yangtz River.The results showed that samples can be refrigerated in darkness for 7 d,HLB cartridge is suitable for extraction of target compounds from water samples without adjusting pH value with acetonitrile as elution solvent.The correlation coefficients of 11 triazine herbicides were 0.997～0.999.The detection limits of 11 triazine herbicides were 0.010～0.021 ng/L.The average recovery rates of 11 triazine herbicides were 61.3％～106％.The precision ranged from 3.91％～9.37％.Seven types of triazine herbicides including atrazine were detected in Yichang section of the Yangtze River tributaries,while no other triazine herbicides were detected.The method has a low detection limit,good accuracy and precision,and is suitable for the detection of triazine herbicides in surface water.
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