Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.aca.2006.05.051
DC FieldValue
dc.titleMicrowave assisted sample preparation for determining water-soluble fraction of trace elements in urban airborne particulate matter: Evaluation of bioavailability
dc.contributor.authorKarthikeyan, S.
dc.contributor.authorJoshi, U.M.
dc.contributor.authorBalasubramanian, R.
dc.date.accessioned2014-10-08T08:32:54Z
dc.date.available2014-10-08T08:32:54Z
dc.date.issued2006-08-18
dc.identifier.citationKarthikeyan, S., Joshi, U.M., Balasubramanian, R. (2006-08-18). Microwave assisted sample preparation for determining water-soluble fraction of trace elements in urban airborne particulate matter: Evaluation of bioavailability. Analytica Chimica Acta 576 (1) : 23-30. ScholarBank@NUS Repository. https://doi.org/10.1016/j.aca.2006.05.051
dc.identifier.issn00032670
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/87557
dc.description.abstractThe feasibility of using two different microwave-based sample preparation methods was investigated to determine the total and water-soluble trace metal fraction in airborne particulate matter. The extraction techniques were then applied to urban particulate matter of different sizes in order to evaluate their bioavailability of associated trace metals. While a combination of HNO3-HF-H2O2 was used for the total trace metal fraction of particulate matter, water was employed for the microwave-assisted extraction of water-soluble trace metal fractions. Inductively coupled plasma-mass spectrometry (ICP-MS) was used for the analysis of trace elements. The experimental protocol for the microwave assisted digestion was established using two different SRMs (1648, urban particulate matter and 1649a, urban dust). In the case of water-soluble trace metal fraction, the quantities extracted from the SRMs were compared between ultrasonic and microwave-assisted extractions, and there was a good agreement between the two extraction methods. Blanks values and limits of detection (LODs) for total and water-soluble trace metal concentrations were determined for three different filter substrates (Teflon, Zeflour, and Quartz). Subsequently, the proposed digestion method was evaluated for its extraction efficiency with these filter substrates. Finally, the real-world application of the proposed microwave-based sample preparation methods was demonstrated by analyzing trace elements in airborne particulate samples collected from different outdoor environments in Singapore. The solubility of 11 trace elements detected in the particulate samples is quantified. © 2006 Elsevier B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.aca.2006.05.051
dc.sourceScopus
dc.subjectAerosols
dc.subjectAir pollution
dc.subjectAirborne particulate matter
dc.subjectExtraction
dc.subjectTrace metals
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.contributor.departmentDIVISION OF ENVIRONMENTAL SCIENCE & ENGG
dc.description.doi10.1016/j.aca.2006.05.051
dc.description.sourcetitleAnalytica Chimica Acta
dc.description.volume576
dc.description.issue1
dc.description.page23-30
dc.description.codenACACA
dc.identifier.isiut000240175900005
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