固相萃取-气相色谱法和全二维气相色谱法测定食品接触用纸制品中饱和烃矿物油的迁移量

Comparative Determination of Migration of Mineral Oil Saturated Hydrocarbons from Food Contact Paper-Based Products by Solid Phase Extraction-Gas Chromatography and Comprehensive Two Dimensional Gas Chromatography

建立并比较固相萃取-气相色谱法和全二维气相色谱法测定食品接触用纸制品中饱和烃矿物油(saturated hydrocarbon mineral oil,MOSH)迁移量的技术.结果表明,优化后的两种方法均能实现迁移液中MOSH的有效分离和检测,方法的相对标准偏差均较好,为4.3%.相较于固相萃取-气相色谱法,全二维气相色谱法前处理更简单,检出限更低(1.0 mg/L),回收率更高(94.4%~102.4%).对17批实际样品的检测表明,两种方法的定量结果的偏差为8.6%,全二维气相色谱法具有更广泛的适用性,可对个别固相萃取-气相色谱法不能检出的样品进行检测与定量.本研究针对食品接触材料检测的难点问题,研究并验证了新技术,为新标准的制定提供了方法学基础数据支撑.

In this paper, a solid phase extraction-gas chromatography (SPE-GC) method and a comprehensive two dimensional gas chromatography (GC × GC) method were established and compared for the determination of MOSH migration from food contact paper-based products. The results showed that both methods could achieve effective separation and detection of MOSH in the migration solution with a relative standard deviation of 4.3%. Compared with SPE-GC, GC × GC required simpler sample pretreatment and had lower limit of detection (LOD)(1.0 mg/L) and higher recoveries (94.4%–102.4%). The deviation between the quantitative results from the two method was 8.6% for 17 batches of actual samples. It was further found that GC × GC had wider applicability and could be used to detect and quantify the samples which could not be detected by SPE-GC. This study provides important methodological data support for the formulation of new standards.