Chemistry: analytical and immunological testing – Food or dairy products
Patent
1987-02-25
1988-10-25
Castel, Benoit
Chemistry: analytical and immunological testing
Food or dairy products
436102, 436121, 436123, G01N 3302
Patent
active
047804173
ABSTRACT:
A process for the rapid extraction, separation, and detection of free and total sulfites in food is disclosed. The process comprises the steps of (a) extracting sulfites from a sample in the presence of a medium having a selected pH to produce an extractant; (b) filtering the extractant; (c) subjecting the filtered extractant to anion exclusion chromatography to produce a sulfite-containing effluent; and (d) detecting the proportion of sulfites in the effluent. The process may be used either to determine free sulfites (by performing extraction in the presence of an acid medium), or to determine total sulfites (by performing extraction in the presence of an alkaline medium). The process of the present invention may be used to determine sulfite levels of 1.0 ppm or less.
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Sullivan et al., Jul. 1985, "Food Tech.", p. 45.
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Cooper et al., "Ion Chromatography for Determining Residual Sulfite on Shrimp", J. of Food Sci., vol. 51, No. 4, pp. 924-929, 1986.
Anderson et al., "Ion Chromatographic Determination of Sulfites in Foods", J. Assoc. Off. Anal. Chem., vol. 69, No. 1, pp. 14-19, 1986.
Kim Hie-Joon
Kim Young-Kyung
Castel Benoit
Gibson Robert P.
Labadini Lawrence E.
McMahon Timothy M.
The United States of America as represented by the Secretary of
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