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Spectrophotometric Determination of Vanadium with Eriochrome Cyanine R and Cetyltrimethylammonium Bromide

Xia Daopei(Department of Chemical Analysis, Wuhan College of Geology)  
The absorbance maximum and molar absorptivity of the complex studied are 585nm and 6.63×10~4L·mol~(-1)·cm~(-1)respectively at pH 5.0—6.0. The composition of the complex is V: ECR:CTAB=1:3:3. The relation for concentration of vanadium obeys Beer's law in the range of 0 to 18μg/25ml. The influence of foreign ions and the relation between reaction speed. and the orders for adding reagents have been studied too.
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