FTIR-ATR infrared spectroscopy for the detection of ochratoxin A in dried vine fruit

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Galvis Sanchez, AC (Author) Other; Barros, A (Author) Other; Delgadillo, I (Author) Other

Journal

Title: Food Additives and Contaminants - Part A Chemistry, Analysis, Control, Exposure and Risk Assessment

Vol. 24

Pages: 1299-1305

ISSN: 1944-0049

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 20 Citations

Scopus - 23 Citations

Other information

Authenticus ID: P-004-D5N

DOI: 10.1080/02652030701452108

Abstract (EN): 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 mu g OTA kg(-1). Samples with OTA levels higher than 20 mu g kg(-1) were separated from samples contaminated with a lower concentration (10 mu g OTA kg(-1)) and from uncontaminated samples. The reported methodology is a reliable and simple technique for screening dried vine fruit for OTA.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7