间隔流动分析法同时检测生活饮用水中的挥发酚类和氰化物

目的 使用间隔流动分析建立同时检测生活饮用水中挥发酚类与氰化物含量的方法。方法 选用自动进样器和在线蒸馏系统, 对标准样品和实际样品进行在线蒸馏分析, 数据处理软件直接给出样品溶液中挥发酚及氰化物的质量浓度。结果 挥发酚类与氰化物的校准曲线相关系数分别为0.9993和0.9998, 挥发酚和氰化物的3水平加标回收率分别为86.3%~101%和89.0%~99.2%, 相对标准偏差分别为2.9%~7.9%和1.6%~6.8%。与国标方法相比, 结果基本一致。结论 该方法操作简便快捷, 具有高灵敏度和低检出限, 减少手工操作带来的误差, 适用于大批量生活饮用水样品中挥发酚类和氰化物的测定。

Simultaneous determination of volatile phenols and cyanide in drinking water by interval flow analysis

Objective To establish interval flow analysis method for simultaneous determination of volatile phenols and cyanide in drinking water. Methods The standard sample and actual sample were analyzed by using automatic sampler and on-line distillation system. The mass concentration of volatile phenol and cyanide in the sample solution was directly gave by the data processing software. Results The correlation coefficients of the calibration curves of volatile phenols and cyanide were 0.9993 and 0.9998, respectively. The recoveries of volatile phenols and cyanide of 3 different spiked levels were 86.3%?101%, 89.0%?99.2%, the relative standard deviations were 2.9%?7.9% and 1.6%?6.8%, respectively. Conclusion The method is simple and quick to operate, has high sensitivity and low detection limit, reduces the error caused by manual operation, and is suitable for the determination of volatile phenols and cyanide in large quantities of drinking water samples.