水中氯化氰的连续流动注射测定法
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摘要
目的建立水中氯化氰的连续流动注射测定法。方法通过全自动进样器取样,分别加入136 g/L磷酸二氢钾缓冲溶液、0.1%氯按T溶液及14 g/L异烟酸-14 g/L巴比妥酸试剂(10 g/L NaOH),利用改造的连续流动注射分析仪,在85℃显色温度条件下测定水中氯化氰。结果在0.50～100μg/L(以CN-计)的线性范围内,回归方程为y=0.083 2x+0.068 1,r=0.999 9。该方法的检出限为0.21μg/L,回收率为93.3%～99.7%,RSD为0.1%～3.0%。结论该方法快速、灵敏、准确、可靠,适用于水中氯化氰的检测。
Objective To establish a method for the determination of cyanogen chloride in water by continuous flow injection analysis. Methods The water sample was collected by autosampler,and reacted with 136 g/L potassium dihydrogen phosphate buffer solution,0.1% chloramines-T solution,and 14 g/L isonicotinic-14 g/L barbituric acid(10 g/L NaOH),the cyanogen chloride in water was determined by modified continuous flow injection analyzer at 85 ℃. Results The linear range was 0.50-100 μg/L,r =0.999 9,the regression equation for cyanogen chloride was y =0.083 2 x +0.068 1,the limit of detection was0.21 μg/L,the recovery rates were 93.3%-99.7% and the RSDs were 0.1%-3.0% respectively. Conclusion This method is rapid,sensitive,accurate and reliable for the determination of cyanogen chloride in water.
Objective To establish a method for the determination of cyanogen chloride in water by continuous flow injection analysis. Methods The water sample was collected by autosampler,and reacted with 136 g/L potassium dihydrogen phosphate buffer solution,0.1% chloramines-T solution,and 14 g/L isonicotinic-14 g/L barbituric acid(10 g/L NaOH),the cyanogen chloride in water was determined by modified continuous flow injection analyzer at 85 ℃. Results The linear range was 0.50-100 μg/L,r =0.999 9,the regression equation for cyanogen chloride was y =0.083 2 x +0.068 1,the limit of detection was0.21 μg/L,the recovery rates were 93.3%-99.7% and the RSDs were 0.1%-3.0% respectively. Conclusion This method is rapid,sensitive,accurate and reliable for the determination of cyanogen chloride in water.
引文
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[2]姜汉硕,余波,伊萍.水中氰化物连续流动注射分析的改进[J].环境与健康杂志,2016,33(7):640-642.
[3]杜兴旗.废水中氰化物及其测定机理综述[J].渭南师范学院学报,2005,2O(2):52-55.
[4]韩子兴,肖丽.氰化物分析的条件优选及相关问题探讨[J].石油化工环境保护,2005,28(4):51-55.
[5]张国正.含氰水溶液中氰稳定性的研究[J].材料保护,1995,28(11):21-23.
[6]邓桂春,张朝红,李兵,等.气态污染物氯化氰的分光光度法测定[J].分析化学,2001,29(5):565-568.