采用的重氮偶合分光光度法、紫外分光光度法和可见分光光度法进行比较,结果表明:国标中饮用水亚硝酸盐应均采用以紫外分光光度计来检测,该方法可使结果稳定,平行误差较小,回收率较高,报出值更准确可靠。 The diazo coupling spectrophotometry, ultraviolet spectrophotometry and visible spectrophotometry were used to compare. The results showed that the national standard of drinking water nitrite should be detected by UV spectrophotometer, the method can make the results stable and parallel The error is smaller, the recovery rate is higher, the reported value is more accurate and reliable.