本文介绍了测定饮用水中吡啶的方法——直接比色法和萃取比色法。对试验条件进行了优化，提出了最佳试剂加入方式。本法精密准确，标准７～８次测定的相对标准差为０．５％～４．３％，水样的相对标准差为１．４％～１．８％，平均加标回收率为９９．４％～１００．５％。用本法测定了自来水、井水等，均未检出吡啶。 This article describes the determination of pyridine in drinking water methods - direct colorimetric and extraction colorimetry. Optimized the test conditions, put forward the best way to add reagents. The method is accurate and accurate. The relative standard deviations (RSDs) of standard 7 ~ 8 times determination are 0.5% -4.3%, and the relative standard deviations of water samples are 1.4% ~ 1.8%. The average recovery rate is 99% .4% ~ 100.5%. Determination of tap water using this method, well water, were not detected pyridine.