用高效阴离子交换色谱-脉冲安培检测法(HPAEC-PAD)测定了烤烟中的水溶性葡萄糖、果糖和蔗糖。采用水浸取及膜过滤法处理烤烟样品,以D ionex C arboPac PA-1阴离子交换柱为色谱柱,0.2m o l/L N aOH水溶液为淋洗液进行分离测定。葡萄糖、...用高效阴离子交换色谱-脉冲安培检测法(HPAEC-PAD)测定了烤烟中的水溶性葡萄糖、果糖和蔗糖。采用水浸取及膜过滤法处理烤烟样品,以D ionex C arboPac PA-1阴离子交换柱为色谱柱,0.2m o l/L N aOH水溶液为淋洗液进行分离测定。葡萄糖、果糖和蔗糖的含量与其峰面积的线性关系良好,回收率均在97%以上。方法简便易行,灵敏度高,重现性良好,可以实现对烟草中单糖的快速分离和测定。展开更多
A new method for determination of 3-MCPD in powder condiments was established by GC-MS method using 1,4-butanediol as an internal standard.Samples were ultrasonically extracted by ethyl acetate,and cleaned up by dispe...A new method for determination of 3-MCPD in powder condiments was established by GC-MS method using 1,4-butanediol as an internal standard.Samples were ultrasonically extracted by ethyl acetate,and cleaned up by dispersive solid-phase extraction(d-SPE) using octadecane sorbent(C18).Then the extract was derivatized with HFBI and detected by GC-MS.The detection limitation was 1.0 μg/kg,and spiked recoveries ranged from 97%-102% with RSD of 2.1%-4.1%.展开更多
文摘用高效阴离子交换色谱-脉冲安培检测法(HPAEC-PAD)测定了烤烟中的水溶性葡萄糖、果糖和蔗糖。采用水浸取及膜过滤法处理烤烟样品,以D ionex C arboPac PA-1阴离子交换柱为色谱柱,0.2m o l/L N aOH水溶液为淋洗液进行分离测定。葡萄糖、果糖和蔗糖的含量与其峰面积的线性关系良好,回收率均在97%以上。方法简便易行,灵敏度高,重现性良好,可以实现对烟草中单糖的快速分离和测定。
文摘A new method for determination of 3-MCPD in powder condiments was established by GC-MS method using 1,4-butanediol as an internal standard.Samples were ultrasonically extracted by ethyl acetate,and cleaned up by dispersive solid-phase extraction(d-SPE) using octadecane sorbent(C18).Then the extract was derivatized with HFBI and detected by GC-MS.The detection limitation was 1.0 μg/kg,and spiked recoveries ranged from 97%-102% with RSD of 2.1%-4.1%.
