两种方法测定质控水样中氰化物的比较

目的探讨测定质控水中低含量氰化物简单、快速、适用的测定方法。方法针对目前测定水中氰化物的两种方法———异烟酸_吡唑啉酮分光光度法和吡啶_巴比妥酸分光光度法的不足 ,实验了用异烟酸_巴比妥酸分光光度法测定水中氰化物 ,并与标准法中异烟酸_吡唑啉酮分光光度法进行对照。结果所测结果经统计学处理 ,两种方法差异无显著性。精密度、准确度等各项分析指标符合分析标准。结论采用异烟酸_巴比妥酸分光光度法测定氰化物比异烟酸_吡唑啉酮分光光度法操作简便快速 ,显色条件易于控制 ,并能降低成本

Comparison of Two Methods for Determination of Cyanide in Quality-Controlled Water Sample

Objective To explore an easy, rapid and suitable method for determination of cyanide with lower concentration in quality_controlled water sample. Methods To overcome the shortcomings in determination of low concentration cyanide in water by iso_niacin_pyrazolone spectrophotometry and pyridin_barbituric acid spectrophotometry, the iso_niacin_barbituric acid spectrophotometry was studied for determining the lower concentration cyanide in water, the data obtained were compared with those obtained from the standard method iso_niacin_pyrazdone spectrophotometry. Results The results showed no statistically significant differences between these two methods. The precision, accuracy and other indexes all accorded with the analysis criteria. Conclusion The iso_niacin_barbituric acid spectrophotometry was easier to operate, more rapid and lower cost, the conditions of colorimetry were easier to be controlled compared with those of iso_niacin_pyrazolone spectrophotometry.