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| Titel: |
FTIR-ATR infrared spectroscopy for the detection of ochratoxin A in dried vine fruit |
| Auteur: |
Galvis-Sanchez, Andrea C. Barros, Antonio Delgadillo, Ivonne |
| Verschenen in: |
Food additives and contaminants. Pt. A, Chemistry, analysis, control, exposure & risk assessment |
| Paginering: | Jaargang 24 (2007) nr. 11 pagina's 1299-1305 |
| Jaar: |
2007-11 |
| Inhoud: |
A method of screening sultanas for ochratoxin A (OTA) contamination, using mid-infrared spectroscopy/Golden Gate single-reflection ATR (attenuated total reflection), is described. The main spectral characteristics of sultanas from different sources were identified in a preliminary acquisition and spectral analysis study. Principal component analysis (PCA) showed that samples of various origins had different spectral characteristics, especially in water content and the fingerprint region. A lack of reproducibility was observed in the spectra acquired on different days. However, spectral repeatability was greatly improved when water activity of the sample was set at 0.62. A calibration curve of OTA was constructed in the range 10-40 µg OTA kg-1. Samples with OTA levels higher than 20 µg kg-1 were separated from samples contaminated with a lower concentration (10 µg OTA kg-1) and from uncontaminated samples. The reported methodology is a reliable and simple technique for screening dried vine fruit for OTA. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 13 gevonden artikelen
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