硫氰酸钴络阴离子与结晶紫水溶液分光光度法测定钴的研究

Spectrophotometry Determination Cobalt of Cobalt (Ⅱ)-Thiocyanate Complex Cationic ion with Crystal Violet in Water

在0．03mol·L－1的盐酸介质中，当有非离子表面活性剂tritonX-100存在时，硫氰酸钴络阴离子与结晶紫能生成可溶于水的三元离子缔合物，我们研究了缔合物生成的条件，测定了缔合物的组成。标准曲线表明，表观摩尔吸光系数为1．1×104L·mol－1·Cm－1。Co（Ⅱ）在0～3μg·mL－1范围内服从比耳定律，本法回收率为96．7～104．3％。

On medium of 0.03 mol. L-1 HCl and at triton X-100, cobalt (Ⅱ) -thiocyanate complex cationic ion with crystal violet can form trinary ion-association complex soluble in water. We determined formation condition and composite or standard curve of the trinary ion-association complex. The apparent Molar absorptivity is 2. 1 ×104 L·mol-1· cm-1. Beer's law is obeyed in the range of 0~3 μg/ mL for cobalt. Recovery is 96. 7 %~104 % of the mothod.