Rapid extraction, separation, and detection method for a separate
analysis of free and total sulfites in foods by ion chromatography
    2.
    发明授权
    Rapid extraction, separation, and detection method for a separate analysis of free and total sulfites in foods by ion chromatography 失效
    快速提取,分离和检测方法,通过离子色谱法分离食品中的游离和总亚硫酸盐

    公开(公告)号:US4780417A

    公开(公告)日:1988-10-25

    申请号:US19082

    申请日:1987-02-25

    IPC分类号: G01N30/96 G01N33/02

    摘要: 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.

    摘要翻译: 公开了一种快速提取,分离和检测食品中游离和总亚硫酸盐的方法。 该方法包括以下步骤:(a)在具有选定pH的介质存在下从样品中提取亚硫酸盐以产生萃取剂; (b)过滤萃取剂; (c)将经过滤的萃取剂进行阴离子排阻层析以产生含亚硫酸盐的流出物; 和(d)检测流出物中亚硫酸盐的比例。 该方法可用于测定游离的亚硫酸盐(通过在酸性介质存在下进行萃取),或者确定总亚硫酸盐(通过在碱性介质的存在下进行萃取)。 本发明的方法可用于测定1.0ppm或更低的亚硫酸盐含量。