✦ LIBER ✦

Indirect determination of arginine by graphite furnace atomic absorption spectrometry after preconcentration on a Nafion chemically modified tungsten coil

✍ Scribed by Litong Jin; Hui Zhu; Tongmin Xu; Wei Tong; Weiliang Zhou; Yuzhi Fang

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 271 KB
Volume: 268
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)85259-9

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✦ Synopsis

A method for the indirect determination of argmme by graphite furnace atomic absorption spectrometry after preconcentratlon on a Nafion chemically modified tungsten cod IS descllbed The mechanism IS discussed In HCl solution (pH 3 51, the exchange competltlon between protonated argmme and Cu2+ on the Nafion film causes a decrease m the amount of Cu *+ bmdmg to the Nafion film, resulting m a decrease m the absorption signal of Cu2+ bemg measured A linear relationship between the decrease m absorbance and the concentration of argmme 1s obtained m the range 3 1 X 10-s-2 5 X lo-' mol 1-l The relative standard dewatlon for ten parallel determmatlons IS 2 3% The detection lurut IS 13 X 10e8 mol 1-l The results for the content of argmme determined m cephradme injection are satisfactory

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