Synthesis of novel chitosan resin possessing histidine moiety and its application to the determination of trace silver by ICP-AES coupled with triplet automated-pretreatment system.
A novel chitosan resin, cross-linked chitosan functionalized with histidine moiety (histidine-type chitosan resin), was synthesized for the collection and concentration of trace silver in aquatic samples. A triplet automated-pretreatment system (Triplet Auto-Pret System) installed mini-columns packed with the synthesized histidine-type chitosan resin was coupled with an inductively coupled plasma-atomic emission spectrometry (ICP-AES) for a rapid and sensitive analysis. Adsorption behavior of 50 elements on the histidine-type chitosan resin was examined. A trace amount of Ag(I) was shown a good adsorption in wide pH regions (pH 5-9), and Ag(I) adsorbed was readily recovered with 1 M nitric acid solution. The limit of detection (3sigma) for silver was 0.03 microg L(-1). The system was successfully applied to river water and dipped water in silver coated container.
Graduate School of Natural Science and Technology & Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan.
Minako
M
Hosoba
Koji
K
Oshita
Rosi K
RK
Katarina
Toshio
T
Takayanagi
Mitsuko
M
Oshima
Shoji
S
Motomizu
D000327:Adsorption; D053000:Analytic Sample Preparation Methods; D001331:Automation; D048271:Chitosan / Q000138:chemical synthesis* / Q000737:chemistry; D004785:Environmental Pollutants / Q000032:analysis*; D018857:Food Packaging; D006639:Histidine / Q000737:chemistry*; D012117:Resins, Synthetic / Q000138:chemical synthesis* / Q000737:chemistry; D012680:Sensitivity and Specificity; D012834:Silver / Q000032:analysis*; D013054:Spectrophotometry, Atomic; D013997:Time Factors; D014867:Water / Q000737:chemistry
D004785:Environmental Pollutants; D012117:Resins, Synthetic; D014867:Water; D012834:Silver; D006639:Histidine; D048271:Chitosan