Detection of bromine by ICP-oa-ToF-MS following photochemical vapor generation

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DOIResolve DOI: http://doi.org/10.1021/ac504747a
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TypeArticle
Journal titleAnalytical Chemistry
ISSN0003-2700
Volume87
Issue5
Pages30723079; # of pages: 8
SubjectBituminous coal; Bromine; Groundwater; Isotopes; Detection limits; Inductively coupled plasma (ICP); Irradiation time; Photochemical reactor; Reference material; Replicate measurements; Transport efficiency; Volatile products; Inductively coupled plasma
AbstractA unique flow-through photochemical reactor is utilized for the generation of volatile methyl bromide from aqueous solutions of bromide and bromate ions in a medium of 2% acetic acid containing 3000 μg/mL NH4Cl. The volatile product is transported to a thin-film gas-liquid phase separator and directed to an inductively coupled plasma (ICP) tine-of-flight mass spectrometer for detection and quantitation using either of the 79Br or 81Br isotopes. Utilizing a sample flow rate of 3.3 mL/min and a 13 s irradiation time, a detection limit of 0.14 ng/mL is achieved, yielding a 17-fold enhancement over conventional solution nebulization. The estimated generation efficiency of 95% provides for a significant increase in analyte transport efficiency to the ICP. Precision of replicate measurement is 2.5% (RSD) at 20 ng/mL. The methodology was validated by successful determination of bromine in reference materials, including IRMM (BCR-611) low level bromide in groundwater, NIST SRM 1568b Rice Flour, and SRM 1632 bituminous coal.
Publication date
PublisherACs Publications
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Measurement Science and Standards
Peer reviewedYes
NPARC number21275830
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Record identifierbc1aefd0-1cac-4eb4-996c-f2c26e0c4aea
Record created2015-07-14
Record modified2016-05-09
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