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Is the effect of direct injection and static headspace injection the same in GC analysis?

Time:2018/09/21   Pageviews:1    Share:
 This is an article about Is the effect of direct injection and static headspace injection the same in GC analysis?. If you are interested, please contact us!

The effect is definitely not the same.

One is the liquid and the other is the gas. The peak time is almost the same. It is just doing it now. Because it is a completely different system, the standard solution must be re-equilibrated, and it is high when used in the headspace.GC vials china
The balance between concentration and low concentration is not the same, nor can it be linear, so it needs to be calibrated according to your sample concentration. The sample bottles should not be very particular, anyway, the parallel comparison is better, the air tightness is better.

However, I am more curious, you have to go to the top of the single component, personal feeling that the headspace is more trouble than direct injection!GC vials china

Separate static headspace sampler and dynamic headspace sampler! It is mainly used for volatile and toxic and harmful substances in volatile organic solvents and coating chemicals. The requirements for the syringe can be a normal GC syringe, or a SPME injector with a probe! The sample is placed in a sample bottle and equilibrated with a pressurized/warmed gas. The gas sample is usually taken automatically (already containing the sample component) and then subjected to routine sample analysis. This technology has a unique place in the processing and collection of samples. By using the headspace sampling device, many interferences can be eliminated, which is a good method for the separation and analysis of volatile analytical samples. GC vials china

Simply put, the headspace sampler consists of a sealed top empty bottle and a syringe. The static headspace is simple, also known as liquid gas.

This is the end of the introduction of Is the effect of direct injection and static headspace injection the same in GC analysis?. I hope it can help you.

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