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《Analytical Laboratory》 1992-03
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Total Arsenic Determination and Its Species and Valent State Analysis in Beverages

Niu Jianjun and Wang Bingwu (Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022)  
The successful analysis of the total, trivalent, pen-tavalent arsenic and arsenic species has been achieved by the new silver salt photometry through complete digestion of the sample and changing the medium and acidity for hydride generation. The detection limit for As (Ⅲ) and total inorganic arsenic was 0.1 and 0. 2ppb(3s) with correlation coefficient 0. 9995 and 0. 9998 respectively, while the reovery of the total and inorganic arsenic was 95~105% and 100% respectively. This method has been applied to analyse different kinds of beverageswith satisfactory results.
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