2-methylpyridine in water was determined by headspace gas chromatography with a hydrogen flame ionization detector(FID).The standard curve was drawn by determining the 2-methylpyridine standard solution with the mass concentration of 0.2～5.0 mg/L.The test results showed that the curve obtained was linear,and the correlation coefficient was≥0.999 9.The experimental data show that this method does not need pretreatment steps such as extraction and concentration,and has high precision,detection accuracy and strong correlation linearity,and the recoveries were 96％～113％.Through experiments to explore the influence of sample pH and sample collection on the determination results,the experiment shows that the response value gradually increases with the increase of pH value,and the detection value of 2-methylpyridine gradually decreases with the increase of sample storage time.
water testingheadspace samplinggas chromatography2-methylpyridineinfluencing factors
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