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Solid-phase extraction using molecularly imprinted polymer for determination of ochratoxin A in human urine
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A rapid, selective and reliable sample preparation technique employing solid-phase extraction (SPE) based on molecularly imprinted polymer (MIP) for the determination of ochratoxin A (OTA) in human urine was described. After sample adjustment to pH 2.5 with 0.1 M HCl, the urine sample was loaded onto the MIP-SPE column, and after a wash step, OTA was eluted for measurement by ultra-high performance liquid chromatography coupled with fluorescence detection. Key parameters which affected the MIP-SPE extraction efficiency were optimized as was the detection method. Under the optimised conditions, the limits of detection and quantification for OTA in urine were 0.2 ng/ml and 0.6 ng/ml, respectively. The recoveries for OTA in urine, spiked at the 0.6, 6.0 and 60 ng/ml levels, ranged from 92.0 to 98.9%. Sixty urine samples were analysed, of which four were found to contain OTA at concentrations ranging from 0.022 to 0.083 ng/ml; the positive results were confirmed by liquid chromatography coupled with tandem mass spectrometry. OTA determination in urine is a good indicator for human exposure to the mycotoxin, and this is the first report on OTA contamination in Chinese people.
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Supplementary Materials
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 386 | 129 | 24 |
| Gesamttextansichten | 32 | 1 | 0 |
| PDF-Downloads | 11 | 0 | 0 |
Solid-phase extraction using molecularly imprinted polymer for determination of ochratoxin A in human urine
in World Mycotoxin JournalSearch for other papers by L. Xie in
Current site
Google Scholar
PubMed
Search for other papers by P. Sheng in
Current site
Google Scholar
PubMed
Search for other papers by W. Kong in
Current site
Google Scholar
PubMed
Search for other papers by X. Zhao in
Current site
Google Scholar
PubMed
Search for other papers by Z. Ou-Yang in
Current site
Google Scholar
PubMed
Search for other papers by M. Yang in
Current site
Google Scholar
PubMed
A rapid, selective and reliable sample preparation technique employing solid-phase extraction (SPE) based on molecularly imprinted polymer (MIP) for the determination of ochratoxin A (OTA) in human urine was described. After sample adjustment to pH 2.5 with 0.1 M HCl, the urine sample was loaded onto the MIP-SPE column, and after a wash step, OTA was eluted for measurement by ultra-high performance liquid chromatography coupled with fluorescence detection. Key parameters which affected the MIP-SPE extraction efficiency were optimized as was the detection method. Under the optimised conditions, the limits of detection and quantification for OTA in urine were 0.2 ng/ml and 0.6 ng/ml, respectively. The recoveries for OTA in urine, spiked at the 0.6, 6.0 and 60 ng/ml levels, ranged from 92.0 to 98.9%. Sixty urine samples were analysed, of which four were found to contain OTA at concentrations ranging from 0.022 to 0.083 ng/ml; the positive results were confirmed by liquid chromatography coupled with tandem mass spectrometry. OTA determination in urine is a good indicator for human exposure to the mycotoxin, and this is the first report on OTA contamination in Chinese people.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 386 | 129 | 24 |
| Gesamttextansichten | 32 | 1 | 0 |
| PDF-Downloads | 11 | 0 | 0 |
