基于液芯光纤和CCD的分光光度法测定河水中的Cr(VI)

Determination of Trace Cr(VI) in River Water Using Liquid Core Optical Fiber and Charge Coupled Device

A convenient and sensitive spectrometric system based on a liquid core optical fiber and a charge coupled device was constructed for the determination of chromium（VI） in river water.Diphenylcarbazide was added to Cr（VI） solution to form colored complex in the medium of perchloric acid.With a 35 cm long Teflon optical fiber,the limit of detection（LOD） was 0.4 μg·L-1,ten times lower than that of Chinese National Standard Procedure（GB7467-87）.The method was applied to determine Cr（VI） in river water without any preconcentration.The recovery was 99%～107%.

A convenient and sensitive spectrometric system based on a liquid core optical fiber and a charge coupled device was constructed for the determination of chromium （Ⅵ） in river water. Diphenylcarbazide was added to Cr （Ⅵ） solution to form colored complex in the medium of perchloric acid. With a 35 cm long Teflon optical fiber, the limit of detection （LOD） was 0.4μg·L^-1, ten times lower than that of Chinese National Standard Procedure （GB7467-87）. The method was applied to determine Cr （Ⅵ） in river water without any preconcentration. The recovery was 99 % -107 % .