| 4 | Determination of Impurity Silicon in Anticancer Drug (Ge-132) by Electrothermally Atomised Atomic Absorption Spectrometry with Optical Temperature Control Accessory显示文摘The present paper describes the ashing and atomization processes in silicon analysis by electrothermally atomised atomic absorption spectrometry(EAAAS) with an uncoat-ed graphite tube, a pyrolytically coated graphite tube and a tungsten-coated graphitetube. The sensitivity and linear range of three graphite tubes were compared. By using optical temperature control accessory, the signals are enhanced by a factor of 2 and the germanium interferences in the determination of silicon are eliminated. The effects of time constant and carrier gas flow-rate on the determination of silicon were also tested. The sample can be directly analyzed in its aqueous solution without any pretreatment. The measurements of samples containing 0. 2 μg/mL and 0. 4 μg/mL silicon were run ten times and the variation coefficient is 4. 9% and 2.6%, respectively. The recovery tests for carboxyethyl germanium sesquioxide(Ge-132) synthesized and imported were performed, and the recoveries are 97. 0% and 110%, respectively. | Xie Shujuan, Wang Daning and Zou Mingqiang (Jilin I/E Commodity Inspection Bureau, Changchun)Cui Xiaoyuan,Ren Yulin and Zheng Yansheng (Department of Chemistry, Jilin University, Changchun)Wang Jincheng (Dalian Military Medical School, Dalian) | 1991 | Chemical Research in Chinese Universities1991，7，4： | 0 |
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