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Sensitive and multiplexed analysis of aflatoxins using time-of-flight secondary ion mass spectrometry

Sensitive and multiplexed analysis of aflatoxins using time-of-flight secondary ion mass... Abstract A rapid and reliable analysis of toxins is prerequisite for food control and human healthcare. Here we demonstrate a simple and multiplexed assay of aflatoxins using time-of-flight secondary ion mass spectrometry (TOF-SIMS). By simply adsorbing either a single analyte or mixed ones onto a gold substrate, the corresponding secondary molecular ions([M+H]+) were clearly observed in a single mass spectrum. As a result of concentration-dependent peak intensity, quantitative and multiplexed analysis of different aflatoxin analogs from corns was accomplished with immunoaffinity column and TOF-SIMS analysis, which showed a good correlation with HPLC data. The detection sensitivity was estimated to be as low as 10 ng mL−1. This approach presented here will find a wide application to detection of low-levels of toxins in a rapid and multiplexed way. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png BioChip Journal Springer Journals

Sensitive and multiplexed analysis of aflatoxins using time-of-flight secondary ion mass spectrometry

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References (35)

Publisher
Springer Journals
Copyright
2012 The Korean BioChip Society and Springer-Verlag Berlin Heidelberg
ISSN
1976-0280
eISSN
2092-7843
DOI
10.1007/s13206-012-6105-8
Publisher site
See Article on Publisher Site

Abstract

Abstract A rapid and reliable analysis of toxins is prerequisite for food control and human healthcare. Here we demonstrate a simple and multiplexed assay of aflatoxins using time-of-flight secondary ion mass spectrometry (TOF-SIMS). By simply adsorbing either a single analyte or mixed ones onto a gold substrate, the corresponding secondary molecular ions([M+H]+) were clearly observed in a single mass spectrum. As a result of concentration-dependent peak intensity, quantitative and multiplexed analysis of different aflatoxin analogs from corns was accomplished with immunoaffinity column and TOF-SIMS analysis, which showed a good correlation with HPLC data. The detection sensitivity was estimated to be as low as 10 ng mL−1. This approach presented here will find a wide application to detection of low-levels of toxins in a rapid and multiplexed way.

Journal

BioChip JournalSpringer Journals

Published: Mar 1, 2012

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