FTIR-ATR infrared spectroscopy for the detection of ochratoxin A in dried vine fruit
| Autor: | Ivonne Delgadillo, Andrea C. Galvis-Sánchez, António S. Barros |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Ochratoxin A
Dried fruit Calibration curve Health Toxicology and Mutagenesis Analytical chemistry Infrared spectroscopy Food Contamination Toxicology chemistry.chemical_compound Spectroscopy Fourier Transform Infrared Vitis Desiccation Spectroscopy Ochratoxin Chemistry Public Health Environmental and Occupational Health Reproducibility of Results General Chemistry Repeatability Ochratoxins Chemistry (miscellaneous) Fruit Attenuated total reflection Carcinogens Food Analysis Food Science |
| Zdroj: | Food Additives & Contaminants. 24:1299-1305 |
| ISSN: | 0265-203X |
| Popis: | 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 microg OTA kg(-1). Samples with OTA levels higher than 20 microg kg(-1) were separated from samples contaminated with a lower concentration (10 microg OTA kg(-1)) and from uncontaminated samples. The reported methodology is a reliable and simple technique for screening dried vine fruit for OTA. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|