采用顶空固相微萃取(HS-SPME)/气-质联用(GC-MS)技术,对高能电子束不同辐照剂量方式处理浓香型白酒的挥发性成分进行了测定与分析。结果表明,经过单圈8 k Gy剂量的辐照处理,白酒挥发性成分由76种增至83种,其中酯类增加4种,相对含量由82...采用顶空固相微萃取(HS-SPME)/气-质联用(GC-MS)技术,对高能电子束不同辐照剂量方式处理浓香型白酒的挥发性成分进行了测定与分析。结果表明,经过单圈8 k Gy剂量的辐照处理,白酒挥发性成分由76种增至83种,其中酯类增加4种,相对含量由82.2%降至81.13%,酸类种类不变,相对含量由4.03%增至4.21%,这与其他浓香型白酒熟化过程中变化趋势一致,对其具有催陈效果。保持白酒总的辐照剂量不变,分别降低单圈辐照剂量至4 k Gy、2 k Gy、1 k Gy,白酒的挥发性成分由83种分别降至82、74、52种,相对含量由95.54%分别降至83.89%、75.58%和68.16%,除烃类物质增加外,酯类、酸类、醇类、醛类物质相对含量均显著降低。采用单圈辐照剂量处理的方式有助于浓香型白酒熟化,提升了品质。展开更多
The propagation characteristics of the beam under various initial conditions are in-vestigated by means of PIC method.The influences of density modulation and velocity modulationon the propagation characteristics are ...The propagation characteristics of the beam under various initial conditions are in-vestigated by means of PIC method.The influences of density modulation and velocity modulationon the propagation characteristics are discussed and compared.The results reveal that by chang-iug the amplitude of the two kinds of modulations and the phase difference between them,the展开更多
文摘采用顶空固相微萃取(HS-SPME)/气-质联用(GC-MS)技术,对高能电子束不同辐照剂量方式处理浓香型白酒的挥发性成分进行了测定与分析。结果表明,经过单圈8 k Gy剂量的辐照处理,白酒挥发性成分由76种增至83种,其中酯类增加4种,相对含量由82.2%降至81.13%,酸类种类不变,相对含量由4.03%增至4.21%,这与其他浓香型白酒熟化过程中变化趋势一致,对其具有催陈效果。保持白酒总的辐照剂量不变,分别降低单圈辐照剂量至4 k Gy、2 k Gy、1 k Gy,白酒的挥发性成分由83种分别降至82、74、52种,相对含量由95.54%分别降至83.89%、75.58%和68.16%,除烃类物质增加外,酯类、酸类、醇类、醛类物质相对含量均显著降低。采用单圈辐照剂量处理的方式有助于浓香型白酒熟化,提升了品质。
基金supported by National Natural Science Foundation of China(60532010 and 60601007)by Specialized Research Fundfor the Doctoral Programof Higher Education(20070614041)
基金National 863-803 Project of China(No.2002AA834020)
文摘The propagation characteristics of the beam under various initial conditions are in-vestigated by means of PIC method.The influences of density modulation and velocity modulationon the propagation characteristics are discussed and compared.The results reveal that by chang-iug the amplitude of the two kinds of modulations and the phase difference between them,the
