Analysis of maltooligosaccharides in honey samples by ultra-performance liquid chromatography coupled with evaporative light scattering detection
文献类型: 外文期刊
作者: Zhou, Jinhui;Wu, Liming;Diao, Qingyun;Li, Yi;Zhao, Jing;Zhou, Jinhui;Wu, Liming;Li, Yi;Zhao, Jing;Zhou, Jinhui;Wu, Liming;Li, Yi;Zhao, Jing;Qi, Yitao;Ritho, Joan;Duan, Lili
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关键词: Maltooligosaccharides;Honey;Authenticity;UPLC-ELSD;Food processing
期刊名称: FOOD RESEARCH INTERNATIONAL
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收录情况: SCI
摘要: We report the use of ultra performance liquid chromatography (UPLC) separation together with evaporative light scattering detection (ELSD) to effectively distinguish honey adulterated with maltooligosaccharides. UPLC separation utilizing a mobile phase with pure water and acetonitrile containing 0.2% triethylamine, resulted in enhanced separation and a running time of less than 6 min. Also, only a simple liquid-liquid extraction was required for the sample pretreatment. This UPLC-ELSD method provides limits of quantifications (LOQs) from 0.30 to 0.60 mg/g for the six maltooligosaccharides (maltose, maltotriose, maltotetraose, maltopentaose, maltohexaose and maltoheptaose) ranging from 15 to 2000 μg/mL with excellent linearity(R~2 ≥ 0.9914). This optimized method also offers a satisfactory intra-day precision of 2.4%-9.4%, inter-day precision of 5.5%-12.1% and accuracy of -7.7%-+11.4% at each level. We successfully applied this system for detecting maltooligosaccharide contamination in 290 honey samples collected from apiaries, supermarkets and traditional agri-product markets. Concentrations of the six maltooligosaccharides varied from undetectable to 14.1 mg/mL The lowest quantifiable concentration that could be detected by this established method was 0.132 mg/mL This study therefore demonstrates the reliability and potential use of the UPLC-ELSD technique in scrutinizing the authenticity of honey in the food processing industry.
分类号: TS2
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