Determination of perchlorates in tea by ion chromatography- tandem mass spectrometry

doi:10.3724/SP.J.1123.2016.06015

Abstract

Abstract:

A rapid ion chromatography-tandem mass spectrometry(IC-MS/MS) method was developed for the determination of perchlorates in tea. The chromatographic analysis was performed on Dionex 5000⁺, using high capacity and hydroxide selective column IonPac AS20 (2 mm). Perchlorates were separated by isocratic elution with 70 mmol/L KOH eluent generated from on-line eluent generation cartridge. TSQ Quantiva^TM, as a detector, scanned samples and monitored multi ion pairs simultaneously for confirmation and quantification, in the mode of negative ESI and multiple reaction monitoring (MRM). The results displayed good linearity in the range of 0.02-10.0 μg/L, with correlation coefficient (r) of 0.9991. The relative standard deviations (RSDs) were 2.67% (n=5). The limits of quantification of the method were 2 μg/kg. The average recoveries of perchlorates in the five kinds of tea ranged from 87.3% to 112.2%. The results showed that the method is fast, simple, selective, sensitive and suitable for the determination of perchlorates in various complex matrix samples such as tea.

Key words: ion chromatography-tandem mass spectrometry (IC-MS/MS), perchlorates, tea

CLC Number:

O658

LIU Xiaofang, FANG Congrong, LIU Hui, LI Renyong, YAN Chao. Determination of perchlorates in tea by ion chromatography- tandem mass spectrometry[J]. Chinese Journal of Chromatography, 2016, 34(10): 986-988.

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