Chem. J. Chinese Universities ›› 1983, Vol. 4 ›› Issue (6): 709.
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Chen Yongzhao, Chen Huanguang, Li Xiangang, Du Daan
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Abstract: Mandelic aci.d was found to be a good masking agent for tin (Ⅳ) at pH 2 to 5.5. The masking power is highest at pH 3.0 to 3.5 and 1 g of mandelic acid can mask up to 35 mg of tin. With the “EDTA-mandelic acid masking method”, tin can be determined in present of Zr, Th, Bi, Fe, Ga, Ce(Ⅲ), La, Hg, Pb,Cu, Ni, Co, Zn, Cd and a little amount of Mn. The interference of Al, Ti (Ⅳ) and Sb(Ⅲ) can be eliminated respectively with malonic acid, hydrogen peroxide and tartaric acid as masking agents. In this way, the tin in alloys and minerals can be determined rapidly and accurately.
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Chen Yongzhao, Chen Huanguang, Li Xiangang, Du Daan . THE USE OF MASKING AGENTS IN CHELOMETRY(Ⅺ)——MANDELIC ACID AS A NEW MASKING AGENT FOR TIN (Ⅳ)[J]. Chem. J. Chinese Universities, 1983, 4(6): 709.
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http://www.cjcu.jlu.edu.cn/EN/Y1983/V4/I6/709
