Application of an improved ion exchange technique for the measurement of delta S-34 values from microgram quantities of sulfur by MC-ICPMS

作者：Das Anirban^*; Chung Chuan Hsiung; You Chen Feng; Shen Min Len

来源：Journal of Analytical Atomic Spectrometry, 2012, 27(12): 2088-2093.

DOI：10.1039/c2ja30189j

Motivated by limitations of the existing solution-based Multiple Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) studies to low sulfur concentrations, analytical procedures are reported for delta S-34 measurements (2 sigma precision of 0.24-0.34 parts per thousand) at sulfur concentration [S] of 2 mu g mL(-1), following its purification by anion exchange resin (AER). delta S-34 values of International Atomic Energy Agency (IAEA) standards S-1, S-2 and S-3, and IAPSO seawater measured in this study agree (within uncertainties) with the consensus values measured by conventional techniques. These values also are in close agreement with the reported numbers by an MC-ICPMS study in which delta S-34 was measured at [S] of 20 mu g mL(-1) following its purification by cation exchange resin (CER). Anion exchange purification offers significant advantages of less sample requirement (2 mu g S vs. 500 mu g S), lower procedural blanks (similar to 12 ng vs. similar to 250 ng of S), and less chemical requirements and sample processing times, over the cation exchange; therefore, delta S-34 measurements attempted in this study would suffer significantly from procedural blank if CER is used. It is believed that the procedures reported in this study would establish the application of MC-ICPMS to delta S-34 measurements in low sulfur containing samples, and should find widespread application especially in studies related to glacier, snow, rainwater and aerosol samples.

• 出版日期2012
• 单位中国石油大学（北京）