论文部分内容阅读
在磷酸介质中，氰根被饱和溴水氧化为溴化氰，剩余的溴水用磺基水杨酸除去。溴化氰与碘化钾反应生成单质碘，碘与淀粉显色，从而测定氰化物。其最大吸收波长λｍ ａｘ＝ ５６５ｎｍ ，ＣＮ－ 在０～１５μｇ／２５ｍ Ｌ范围内呈良好线性关系，表观摩尔吸光系数为３．１×１０４Ｌ·ｍ ｏｌ－ １·ｃｍ － １。已用于测定废水中的氰化物。
In a phosphoric acid medium, cyanide is oxidized by saturated bromine water to cyanogen bromide and the remaining bromine water is removed by sulfosalicylic acid. Cyanide bromide reacts with potassium iodide to form elemental iodine, which colorizes with starch to determine cyanide. The maximum absorption wavelength λm ax = 565nm, CN- showed good linearity in the range of 0 ~ 15μg / 25m L, and the apparent molar absorptivity was 3.1 × 104L · mol-1 · cm-1. Has been used for the determination of cyanide in wastewater.