Cadmium isotope ratio measurements in environmental matrices by MC-ICP-MS

被引：3

作者：

Pallavicini, Nicola ^{[1
,2
]}

Engstrom, Emma ^{[1
,2
]}

Baxter, Douglas C. ^{[2
]}

Ohlander, Bjorn ^{[1
]}

Ingri, Johan ^{[1
]}

Rodushkin, Ilia ^{[1
,2
]}

机构：

[1] Lulea Univ Technol, Div Geosci, S-97187 Lulea, Sweden

[2] ALS Scandinavia AB, ALS Lab Grp, S-97775 Lulea, Sweden

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 2014年 / 29卷 / 09期

关键词：

METAL POLLUTION; PRECISE DETERMINATION; NORTHEAST SWEDEN; FRACTIONATION; LEAD; SAMPLES; ZN; CONSTITUENTS; SEPARATION; BIVALVES;

D O I：

10.1039/c4ja00125g

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Various stages of an analytical method for high-precision cadmium (Cd) isotope ratio measurements by MC-ICP-MS (sample preparation, matrix separation, instrumental analysis and data evaluation) were critically evaluated and optimized for the processing of carbon-rich environmental samples. Overall reproducibility of the method was assessed by replicate preparation and Cd isotope ratio measurements in various environmental matrices (soil, sediment, Fe-Mn nodules, sludge, kidney, liver, leaves) and was found to be better than 0.1 parts per thousand (2 sigma for delta Cd-114/Cd-110) for the majority of samples. Cd isotope ratio data for several commercially-available reference materials are presented and compared with previously published results where available. The method was used in a pilot study focusing on the assessment of factors affecting Cd isotope composition in tree leaves. A summary of results obtained for a large number (n > 80) of birch (Betula pubescenes) leaves collected from different locations in Sweden and through the entire growing season is presented and potential reasons for observed variability in Cd isotope composition are discussed. Seasonal dynamics of element concentrations and isotope compositions in leaves were also compared for Os, Pb, Zn and Cd.

引用

页码：1570 / 1584

页数：15

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