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酞酸酯类化合物前处理方法比对实验
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作者 孟旭 赖承钺 +1 位作者 杨璐瑶 张玉娇 《仪器仪表与分析监测》 CAS 2023年第3期47-50,共4页
传统的手工固相萃取样品前处理方法存在人为误差,且操作过程中大量使用的有机试剂对实验员存在较大健康风险。为减轻实验员工作压力,降低实验过程中对人体健康的影响,本文开发了利用全自动固相萃取仪对酞酸脂类化合物的前处理方法,并与... 传统的手工固相萃取样品前处理方法存在人为误差,且操作过程中大量使用的有机试剂对实验员存在较大健康风险。为减轻实验员工作压力,降低实验过程中对人体健康的影响,本文开发了利用全自动固相萃取仪对酞酸脂类化合物的前处理方法,并与传统手工固相萃取前处理方法进行了比对分析。实验表明,在监测水中部分新污染物时,酞酸酯类物质手动固相萃取法回收率(75.8%~107%)和自动固相萃取法的回收率(70.7%~100.6%)相差不大,自动固相萃取方法可替代传统手工固相萃取方法。 展开更多
关键词 手工固相萃取 自动 酞酸酯
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Comparative Study of the Flavor Compounds in two Different Milk with SPME-GCMS
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作者 Ma Yanfen Wang Lifang Gao Min 《Feed & Livestock》 2012年第2期23-28,共6页
The flavor is very important in the dairy industry because it decides on the acceptance of milk and other dairy products. And the flavor compounds in two different milk were analyzed with SPME-GCMS. At present, the mi... The flavor is very important in the dairy industry because it decides on the acceptance of milk and other dairy products. And the flavor compounds in two different milk were analyzed with SPME-GCMS. At present, the milking mode includes automatic milking and manual milking in cat- tle farm. Milk samples, collected from six healthy early/mid-lactation Holstein cows, were analyzed by static headspace (SH) and solid phase microextraction (SPME) combined with gas-chromatogra- phy and mass spectrometry (GCMS) in this paper. The result showed that the aroma compounds in milk (automatic milking) were more than that of milk (manual milking), but the off-flavor com- pounds in milk (automatic milking) were less than that of milk (manual milking). So to preserve the good flavor, the milk should be extruded with the automate milking. 展开更多
关键词 flavor compounds raw milk COW SPME
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