Environmental and food analysis by desorption atmospheric pressure photoionization‐mass spectrometry |
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| Authors: | Laura Luosujärvi Sanna Kanerva Ville Saarela Sami Franssila Risto Kostiainen Tapio Kotiaho Tiina J Kauppila |
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| Institution: | 1. Laboratory of Analytical Chemistry, Department of Chemistry, P.O.Box 55, FI‐00014 University of Helsinki, Finland;2. Department of Micro and Nanosciences, Aalto University School of Science and Technology (former Helsinki University of Technology), P.O. Box 13500, FI‐00076 Aalto, Finland;3. Department of Materials Science and Engineering, Aalto University School of Science and Technology (former Helsinki University of Technology), P.O. Box 16200 FI‐00076 Aalto, Finland;4. Division of Pharmaceutical Chemistry, Faculty of Pharmacy, P.O. Box 56, FI‐00014 University of Helsinki, Finland |
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| Abstract: | Desorption atmospheric pressure photoionization‐mass spectrometry (DAPPI‐MS) is a versatile surface analysis technique for a wide range of analytes, especially for neutral and non‐polar analytes. Here, a set of analytes typically found in environmental or food samples was analyzed by DAPPI‐MS. The set included five polyaromatic hydrocarbons (PAHs), one N‐PAH, one brominated flame retardant, and nine pesticides, which were studied with three different spray solvents: acetone and toluene in positive ion mode, and anisole in negative ion mode. The analytes showed M + H]+, M+?, and M–H]? ions as well as fragmentation and substitution products. Detection limits for the studied compounds ranged from 30 pg to 1 ng (from 0.14 to 5.6 pmol). To demonstrate the feasibility of the use of DAPPI‐MS two authentic samples – a circuit board and orange peel – and a spiked soil sample were analyzed. Tetrabromobisphenol A, imazalil, and PAHs were observed from the three above‐mentioned samples, respectively. The method is best suited for rapid screening analysis of environmental or food samples. Copyright © 2010 John Wiley & Sons, Ltd. |
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