Studies of Matrix Modifiers in the Determination of Tin by GFAAS

Abstract

Abstract: In this paper, the mixed modifiers in the determination of tin by GFAASwere studied. The mechanisms of tin stabilized by two modifiers were inquired using X-ray diffraction analysis. The two modifiers can increase charring temperature up to 1400 ℃ and 1350 ℃, respectively. Mg(NO₃)₂ would form a higher background absorption in the determination process for tin. It has more advantages to use Ni+Vc, such as extremely increasing charring temperature, improving the determination sensitivity,decreasing the background absorption and the matrix interference. The measured results for the stream sediment samples are consistent with the certified value.

Key words: GFAAS, Tin, Matrix modifier, Stabilization mechanism

CLC Number:

O657.31

TrendMD:

CHEN Shu-Yu, WU Rong-Hu, LIN Shu-Qin . Studies of Matrix Modifiers in the Determination of Tin by GFAAS[J]. Chem. J. Chinese Universities, 1998, 19(6): 861.

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Studies of Matrix Modifiers in the Determination of Tin by GFAAS

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