2012•Zhōnghuá yàoxué zázhìRequires access
Determination of Chromium in Soft Capsule Shells by Microwave Digestion-Graphite Furnace Atomic Absorption Spectrophotometry
Zhe Dong, Feng Ke-ran, Luyong Zhang, Yuting Zhang, Song Yu, Cao Jin, Qingsheng Zhang, Gang-Li Wang
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Abstract
OBJECTIVE To establish a method of microwave digestion-graphite furnace atomic absorption spectrophotometry for the determination of chromium in soft capsule shells. METHODS Microwave digestion was adopted to digest the soft capsule shells. Graphite furnace temperature control program was optimized,Zeeman effect was used in the background correction,the slit width was 0.5 nm,and the content of chromium was determined under the wavelength of 357.9 nm.RESULTS The calibration curve was linear in the range of 0-50 mg·L -1 , ( r=0.999 6). The detection limit was 0.06 mg·kg -1 , and the average recoveries were 90%-110%. CONCLUSION This method is simple , accurate, and suitable for the determination of chromium in soft capsule