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moncler veste 气相色&#3588

 
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PostPosted: Wed 10:33, 30 Mar 2011    Post subject: moncler veste 气相色&#3588

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气相色谱法测定地方白酒中乙酸乙酯、杂醇油含量
2。(色谱图中的数字太小,提供清晰的色谱图)重复性测试:为了验证方法的准确度,特对一种酒样进行精密度测试,结果如表3。待测组分的含量=f.A,[link widoczny dla zalogowanych]。/A式中:A——内标物(正戊醇)的峰面积A,——某待测组分的峰面积——内标物(正戊醇)的含量(g/L).——某待测组分的相对质量校正因子①乙酸乙酯②正丁醇③异戊醇④正戊醇图2酒样的色谱图56北京联合大学学报(自然科学版)2009年9月3.3回收率测定为了测定结果的准确度,[link widoczny dla zalogowanych],进行回收率实验,见表4。在1mL酒样中加入0.1mL的正戊醇标准溶液后,再加0.1mL的乙酸乙酯的标准溶液后测定乙酸乙酯的回收率。同样,[link widoczny dla zalogowanych],加入0.05mL的正丁醇或异戊醇的标准溶液后测定正丁醇或异戊醇的回表4酒样的回收率收率。4总结1)在本次试验中,色谱图显示除乙酸乙酯外,[link widoczny dla zalogowanych],各组分的分离效果良好,根据实验数据显示,方法的相对偏差不大于10%,回收率在82.2%一117.O%之间。本次实验分离效果好,操作简单、方便,分析速度快。2)通过对酒样中乙酸乙酯、正丁醇、异戊醇含量的测定,酒样中杂醇油含量在卫生指标内。白酒中杂醇油卫生指标0.300g/L[】。[
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