An analytical method for precise determination of the cadmium isotopic composition in plant samples using multiple collector inductively coupled plasma mass spectrometry
作者： Rongfei Wei , Qingjun Guo , Hanjie Wen , Junxing Yang , Marc Peters
DOI: 10.1039/C4AY02435D
关键词: Inductively coupled plasma mass spectrometry 、 Cyperus alternifolius 、 Chemistry 、 Chromatography 、 Stable isotope ratio 、 Analytical chemistry 、 Fractionation 、 Isotope 、 Cadmium 、 Pteris vittata 、 Standard solution
摘要: Isotope techniques can be applied to discover the migration and transformation of metal elements in plants. However, only a few studies on Cd isotopes plants have been carried out so far. In this study, an optimized analytical method consisting digestion, purification determination was developed. Three standard solutions as well four plant species (Solanum nigrum, Ricinus communis, Cyperus alternifolius Pteris vittata), which were grown soil or hydroponic cultures, repeatedly analyzed for using Multiple Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS). The factors that affected accuracy isotopic determination, such isobaric interference instrumental mass fractionation, carefully evaluated corrected. procedure yielded recovery not less than 95% effectively eliminated spectral Pd, Sn well. analysis pure materials showed accurate isotope values, matched with results previously published methods. This technique provided average long-term external reproducibility ±0.09‰ δ114/110Cd (2SD). overall values ranged from −0.39‰ −0.08‰ direct evidence fractionation herbaceous
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