Precautions for gas chromatographic analysis of thiophene in benzene
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I would like to ask the experts: can thiophene contained in benzene be analyzed using gas chromatography? How should I choose the chromatography column, and how do I set the analysis conditions? What level of analytical accuracy can be achieved? This post was last edited by lifanwang on 2009-3-14 20:43]
1. Chromatographic analysis can be used. 2. HP-5 or DB-1 are both suitable. 3. Maintain a temperature of 50 degrees; the carrier gas flow rate should be 0.8, while the temperatures at the injection port and the detector should be 200 degrees. 4. Use an FPD detector
Can SP3420 chromatography be used?
With the appropriate detectors in place, detection should be no problem; however, the accuracy of instruments from different manufacturers varies, which means that the detection thresholds will differ as well
For the chromatographic analysis of thiophene, it is essential to use a chromatograph equipped with an FPD detector. When the concentration is extremely high or low, different sample preprocessing methods and various chromatographic conditions need to be considered.
The FPD detector is mainly used for analyzing sulfur and phosphorus, right? If the sample contains other impurities such as cyclohexane and heptane, can they also be analyzed using the FPD detector?
FPD is a dedicated detector for analyzing phosphorus sulfides. If the sample contains other impurities such as cyclohexane or heptane, it cannot be analyzed using the FPD detector; those other impurities can be analyzed with a FID detector. Here is a link to the relevant instructions: http://www.scilink.cn/ROOT/knowledge/knowledgeitem.jsp?knowledgeid=882 This post was last edited by lifanwang on 2009-3-17 09:43
No, an oxygen-enriched flame is used for analyzing hydrocarbons, while a hydrogen-enriched flame is used for analyzing sulfur; FPD is a selective detector.