[Study on application of crosslinked chitosan to the speciation analysis of selenium].
The adsorption of Se(IV)/Se(VI) by crosslinked chitosan was studied and the adsorption mechanism was concerned. The results indicated that the adsorption of Se(VI) was 95% at pH=4, while almost no adsorption for Se(IV). The adsorbed Se(VI) was quantitatively desorbed with 1 mol/L HCl after adsorption of Se(VI). A new method for the determination of trace Se(IV)/Se(VI) and organic selenium in environmental samples with hydride generation and atomic absorption spectphotometry has been developed. The detection limit of this method was 20 ng/L, the recovery was 93%-106% and the coefficient of variation was 2.0%-5.0%.
Jiang
J
J
Department of Environmental Sciences, Wuhan University, 430072 Wuhan.
Huang
G
G
Qian
S
S
Wang
Y
Y
Wang
M
M
D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D005737:Garlic / Q000737:chemistry; D019015:Geologic Sediments / Q000032:analysis; D012643:Selenium / Q000032:analysis*; D014867:Water / Q000032:analysis
D014867:Water; D048271:Chitosan; D012643:Selenium