Journal article
Determination of hydrogen peroxide concentration using a handheld Raman spectrometer: Detection of an explosives precursor
Forensic Science International, Vol.216(1-3), pp.e5-e8
2012
Abstract
It has been shown that a handheld Raman spectrometer can be used to determine hydrogen peroxide concentration in aqueous solutions in seconds. To allow quantitative analysis, the aqueous peroxide samples were mixed 50/50 (v/v) with a 4 mol/dm3 sodium perchlorate solution which acted as the internal standard. Standard calibration using relative peak heights of the strongest perchlorate (932 cm−1) and peroxide bands (876 cm−1) gave an average error of 1.43% for samples in the range 5-30% peroxide. PLS regression of the same data set gave an average error of 0.98%. In addition, the concentrations of the samples were estimated by searching spectra against a library of standard spectra prepared using the same range of peroxide concentrations at 5% increments and with the same perchlorate internal standard. It was found that the library searching method classified all the test samples correctly, matching either the spectra of the same concentration, if they were present, or matching to the closest concentration if an exact match was not possible. This method thus provides a very rapid technique to allow determination of hydrogen peroxide concentrations in the field, for example at suspected improvised explosives manufacturing sites, without complex calibration procedures.
Details
- Title
- Determination of hydrogen peroxide concentration using a handheld Raman spectrometer: Detection of an explosives precursor
- Authors/Creators
- S.P. Stewart (Author/Creator) - Queen's University BelfastS.E.J. Bell (Author/Creator) - Queen's University BelfastD. McAuley (Author/Creator) - Northern (Arctic) Federal UniversityI. Baird (Author/Creator) - Northern (Arctic) Federal UniversityS.J. Speers (Author/Creator) - Northern (Arctic) Federal UniversityG. Kee (Author/Creator) - Northern (Arctic) Federal University
- Publication Details
- Forensic Science International, Vol.216(1-3), pp.e5-e8
- Publisher
- Elsevier
- Identifiers
- 991005544129407891
- Copyright
- © 2011 Elsevier Ireland Ltd.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 2 Chemistry
- 2.244 Chemometrics
- 2.244.1547 Biomedical Raman Spectroscopy
- Web Of Science research areas
- Medicine, Legal
- ESI research areas
- Clinical Medicine