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Study on Highly Sensitve Spectrophotometric Determination of Trace Zinc (II)

Changrong Xia

Abstract

A new ultra sensitive spectrophotometric method for the determination of Zn 2+ was developed by using Zn 2+ SCN - RhB PVA system.In the medium of hydrochloric acid,the reaction has high sensitivity.The apparent molar absorptivity of Zn RhB complex is 1.58×10 6 L·mol -1 ·cm -1 ,Beer's law is obeyed for the mass concentration of Zn(Ⅱ) in the range of 0～2.0 μg/50 mL.The contents of zinc in drinking water were determined by the new method

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Key concepts: Chemistry, Molar absorptivity, Hydrochloric acid, Zinc, Spectrophotometry, Nuclear chemistry, Color reaction, Trace Amounts