期刊
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
卷 35, 期 6, 页码 1125-1130出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ja00068j
关键词
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资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPNM 477963-2015]
- Mitacs [IT13371]
- Burgener Research [IT13371]
This study compares the analytical figures of merit of inductively coupled plasma optical emission spectrometry (ICPOES) with an infrared (IR)-heated modified cyclonic spray chamber (MC) system providing total sample consumption at up to 75 mu L min(1), Apex E desolvation system and IsoMist programmable temperature spray chamber. A baffled cyclonic spray chamber (BC) at room temperature was used as a reference sample introduction system. Sample uptake rates of 25, 50 and 75 mu L min(-1)were tested. Under operating conditions providing a compromise in sensitivity and robustness, and at a sample uptake rate of 50 mu L min(-1), the improvement in the sensitivity and detection limit of the MC and Apex was comparable and significantly higher than that for IsoMist. However, at a sample uptake rate of 75 mu L min(-1), the order of the improvement in the sensitivity and detection limit was Apex > MC > IsoMist. In general, at sample uptake rates of 50 and 75 mu L min(-1)and in contrast to IsoMist, the sensitivity and detection limit for the MC and Apex were not decreased against those obtained with the BC at a regular sample uptake rate of 1 mL min(-1). The MC system provided the highest plasma robustness. At a given sample uptake rate, the MC also provided a shorter washout time than Apex and IsoMist. Accurate ICPOES analysis of two certified reference materials of drinking and waste waters was performed with the MC using a simple external calibration without internal standardization and the results were similar to those obtained for the BC, IsoMist and Apex. This demonstrates the suitability of the MC as a sample introduction system for ICPOES.
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