含硫氰酸盐水质中低浓度氰化物的测定

Determination of low concentrations of cyanide in water containing thiocyanate

黄金工业废水中常含有硫氰酸盐,测定低浓度氰化物时,存在测定结果偏高、重复性差等问题。研究建立了含硫氰酸盐水质中低浓度氰化物的测定方法,采用异烟酸-吡唑啉酮分光光度法测定馏出液中硫氰酸盐氰贡献值校准氰化物。本方法的精密度(RSD)小于4%,加标回收率为94%~102%,准确度和精密度良好。

Gold industrial wastewater often contains thiocyanate,and there are problems such as higher measurement results and poor repeatability when measuring low concentrations of cyanide.A method for determining low concentrations of cyanide in water containing thiocyanate was developed,using isonicotinic acid-pyrazolone spectrophotometry to measure the cyanide the calibrates cntribution value in thiocyanate in the distillate.The precision of this method is less than 4%,with spike recoveries ranging from 94%to 102%,indicating good accuracy and precision.