连续流动分析法同时测定水中挥发酚、氰化物等6项指标

何俊; 杜艳丽; 邹静; 陈曦

doi:10.13421/j.cnki.hjwsxzz.2023.06.010

连续流动分析法同时测定水中挥发酚、氰化物等6项指标

Simultaneous determination of 6 indexes in water by continuous flow analyzer

摘要

摘要:
目的建立连续流动分析仪同时测定水中挥发酚、氰化物、阴离子合成洗涤剂、总磷、总氮、硫化物的方法。
方法采用并联两台连续流动分析仪主机的方法, 通过特定前处理, 能同时测定生活饮用水中挥发酚、氰化物、阴离子合成洗涤剂、硫化物和地表水中总磷、总氮的含量。
结果测定的挥发酚、氰化物、阴离子合成洗涤剂、总磷、总氮、硫化物在线性范围内的相关系数（r）均在0.999以上, 检出限分别为0.001、0.000 3、0.032、0.015、0.037和0.011 mg/L。各指标的相对标准偏差(RSD)为0.42%~4.22%, 加标回收率在94.3%~106.4%的范围内。
结论该法简单、快速, 检出限低, 精密度高和准确度好, 满足实验室质量控制要求, 适用于大批量样品分析。

Abstract:
Objective To improve a method for simultaneous determination of volatile phenol, cyanide, anionic synthetic detergent, total phosphorus, total nitrogen, and sulfide in water by continuous flow analyzer.
Methods Two continuous flow analyzers in parallel were used to simultaneously determine the contents of volatile phenol, cyanide, anionic synthetic detergent, total phosphorus, total nitrogen, and sulfide in water after online distillation, extraction and ultraviolet digestion.
Results The correlation coefficients (r) of volatile phenol, cyanide, anionic synthetic detergent, total phosphorus, total nitrogen, and sulfide were all above 0.999 within the linear range, with detection limits of 0.001, 0.0003, 0.032, 0.015, 0.037 and 0.011 mg/L, respectively. The relative standard deviation (RSD) of each indicator ranged from 0.42%-4.22% at different concentrations, with a recovery of 94.0%-106.0%.
Conclusion This method is simple and rapid with a low detection limit, high precision, and good accuracy, which meets the requirements of laboratory quality control, and is suitable for the analysis of large quantities of samples.

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