LC-ICP-MSLiquid chromatography coupled with inductively coupled plasma mass spectrometry
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Eleven repeat speciation analyses of Natural Water 1640 using LC-ICP-MS showed that the mean (SD) concentrations of [As.
With the LC-ICP-MS method, the limits of detection, defined as the concentration of arsenic that produced a chromatographic peak having intensity equal to 3 times the SD of the baseline noise (30), were 0.
Results in Tables 1 and 2 show that the sum of arsenic species concentrations (obtained from LC-ICP-MS and LC-ESI-MS/MS) was in good agreement with the total arsenic concentrations (obtained from ICP-MS analyses without LC separation).
LC-ICP-MS enables selective quantification of arsenic species, and LC-ESI-MS/MS provides confirmation of the species identities.