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夏天的娃金蟲 (小有名氣)
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[求助]
氣相色譜測含有不揮發(fā)液體樣品中的揮發(fā)物質(zhì)含量時該如何處理?
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大家好! 小蟲需要測液體樣品的濃度,組分是1個脂肪烴1個芳香烴再加上1個液態(tài)鹽。液態(tài)鹽高沸點,300度也不氣化,不過我只需要知道2個烴的相對濃度,但是鹽流入GC柱子的話肯定會堵柱子呀! 但是在許多外文文獻都有使用GC去測我這種體系的含量,只是在色譜上加了別的東西處理一下,我搜搜了一下相關信息很少呢,好像有用“在線過濾器”,“預柱”,但是供應信息很少,預柱一般是HPLC用的多。因此發(fā)帖請教大蟲有什么東西能使GC處理我這樣的體系呢?另外文獻里說的的trap和預柱一般貴么。。5000以上怕是老師不大同意了。。。 附上文獻里說的預處理使用的東西: 1.For the samples, the whole of the 不揮發(fā)鹽 was retained by aSample Textlocated between the injector and the chromatographic column. In this way, the result of the analysis was not affected by the presence of 鹽, as we were able to verify experimentally.The trap was periodically cleaned to prevent the IL from coming into the column. 2.The amount of 鹽 could not be analyzed via gas chromatography, because of the negligible vapor pressure of 鹽; The 鹽 was collected in a precolumn (cup linear), to avoid contamination of the analytical column. 謝謝呀謝謝! ![]() [ Last edited by 夏天的娃 on 2012-8-28 at 18:41 ] |
金蟲 (小有名氣)
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金蟲 (小有名氣)
木蟲 (小有名氣)

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