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Title: Analysis of perchlorate in groundwater by electrospray ionization mass spectrometry/mass spectrometry

Abstract

An electrospray ionization mass spectrometry/mass spectrometry (ESI/MS/MS) method was developed to measure part-per-billion ({micro}g/L) concentrations of perchlorate in groundwater. Selective and sensitive perchlorate detection was achieved by operating the mass spectrometer in the negative ionization mode and by using MS/MS to monitor the CIO{sub 4}{sup {minus}} to ClO{sub 3}{sup {minus}} transition. The method of standard additions was used to address the considerable signal suppression caused by anions that are typically present in groundwater, such as bicarbonate and sulfate. ESI-MS/MS analysis was rapid, accurate, reproducible, and provided a detection limit of 0.5 {micro}g/L perchlorate in groundwater. Accuracy and precision of the ESI/MS/MS method were assessed by analyzing performance evaluation samples in a groundwater matrix and by comparing ion chromatography (IC) and ESI/MS/MS results for local groundwater samples. Results for the performance evaluation samples differed from the certified values by 4--13%, and precision ranged from 3 to 10% (relative standard deviation). The IC and ESI/MS/MS results were statistically indistinguishable for perchlorate concentrations above the detection limits of both methods.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
OSTI Identifier:
20080528
Resource Type:
Journal Article
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 34; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0013-936X
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; WATER POLLUTION; GROUND WATER; PERCHLORATES; MASS SPECTROSCOPY; PERFORMANCE TESTING; ION EXCHANGE CHROMATOGRAPHY; ECOLOGICAL CONCENTRATION

Citation Formats

Koester, C.J., Beller, H.R., and Halden, R.U. Analysis of perchlorate in groundwater by electrospray ionization mass spectrometry/mass spectrometry. United States: N. p., 2000. Web. doi:10.1021/es991209j.
Koester, C.J., Beller, H.R., & Halden, R.U. Analysis of perchlorate in groundwater by electrospray ionization mass spectrometry/mass spectrometry. United States. doi:10.1021/es991209j.
Koester, C.J., Beller, H.R., and Halden, R.U. Mon . "Analysis of perchlorate in groundwater by electrospray ionization mass spectrometry/mass spectrometry". United States. doi:10.1021/es991209j.
@article{osti_20080528,
title = {Analysis of perchlorate in groundwater by electrospray ionization mass spectrometry/mass spectrometry},
author = {Koester, C.J. and Beller, H.R. and Halden, R.U.},
abstractNote = {An electrospray ionization mass spectrometry/mass spectrometry (ESI/MS/MS) method was developed to measure part-per-billion ({micro}g/L) concentrations of perchlorate in groundwater. Selective and sensitive perchlorate detection was achieved by operating the mass spectrometer in the negative ionization mode and by using MS/MS to monitor the CIO{sub 4}{sup {minus}} to ClO{sub 3}{sup {minus}} transition. The method of standard additions was used to address the considerable signal suppression caused by anions that are typically present in groundwater, such as bicarbonate and sulfate. ESI-MS/MS analysis was rapid, accurate, reproducible, and provided a detection limit of 0.5 {micro}g/L perchlorate in groundwater. Accuracy and precision of the ESI/MS/MS method were assessed by analyzing performance evaluation samples in a groundwater matrix and by comparing ion chromatography (IC) and ESI/MS/MS results for local groundwater samples. Results for the performance evaluation samples differed from the certified values by 4--13%, and precision ranged from 3 to 10% (relative standard deviation). The IC and ESI/MS/MS results were statistically indistinguishable for perchlorate concentrations above the detection limits of both methods.},
doi = {10.1021/es991209j},
journal = {Environmental Science and Technology},
issn = {0013-936X},
number = 9,
volume = 34,
place = {United States},
year = {2000},
month = {5}
}