Determination of aflatoxin B1 in alcoholic beverages: comparison of one- and two-photon-induced fluorescence

被引：0
|
作者：
Claudia Rasch
Maike Böttcher
Michael Kumke
机构：
[1] University of Potsdam,Department of Chemistry (Physical Chemistry)
来源：
Analytical and Bioanalytical Chemistry | 2010年 / 397卷
关键词：
Aflatoxin B; Fluorescence; Two-photon absorption; Two-photon-absorption cross-section; Beer; Wine;
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学科分类号：
摘要：
The qualitative and quantitative analysis of aflatoxin B1 in a model system (water/ethanol), in different wines and in beer using one- and two-photon-induced fluorescence is discussed. The absorption and fluorescence properties of aflatoxin B1 depend on the solvent and pH. The two-photon-absorption cross-section was calculated for aflatoxin B1 in beer and wine (σ2 ∼ 25 GM) for excitation at 720 nm. A comparison of the one- and two-photon- induced fluorescence results showed that the disturbance due to background emission originating from matrix constituents is significantly reduced under two-photon-excitation conditions. The limit of detection for the one- and two-photon-induced fluorescence was determined.
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页码：87 / 92
页数：5
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