An Interlaboratory Trial on the Identification of Irradiated Spices, Herbs, and Spice–Herb Mixtures by Thermolummescence Analysis

Autor:	Klaus Werner Bögl, Georg A. Schreiber, Norbert elle
Rok vydání:	1995
Předmět:	Pharmacology food.ingredient Chromatography Chemistry Analytical chemistry Thermoluminescence Analytical Chemistry food Multicenter study Glow curve Herb Environmental Chemistry Irradiation Agronomy and Crop Science Food Science
Zdroj:	Journal of AOAC INTERNATIONAL. 78:88-93
ISSN:	1944-7922 1060-3271
DOI:	10.1093/jaoac/78.1.88
Popis:	Thermoluminescence analysis was used in an interlaboratory study to detect irradiation treatment of spices, herbs, and spice–herb mixtures in the dose range used for the reduction of microbial counts. About 3 and 9 months after irradiation, 14 participating laboratories determined the thermoluminescence of mineral contaminants that had been isolated from coded samples. A total of 18 different products (6 spices, 6 herbs, and 6 spice–herb mixtures) were examined. The method gave correct identifications as irradiated or nonirradiated in 99.1% of 317 samples. Only 3 irradiated samples were not correctly identified. This result was achieved by integration of whole glow curves. By glow curve analysis, a temperature range could be determined in which differentiation between irradiated and nonirradiated samples was even better than on the basis of the total integral values.
Databáze:	OpenAIRE
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