In order to achieve the best performance with headspace GC, be careful to take note of sample preparation and instrument setup. Vials and lids are very important and often overlooked, and are also prepared for elemental headspace analysis.
It is important to make sure you use the right vials and lid!
Vials size
Available in 6, 10, and 20 ml sizes in the headspace vials. Use a standard vial to ensure adequate headspace, and this must be achieved at a standard ratio, which must of course be a sample that is not over-diluted. Usually the reserved capacity after comparison should be at least 50% of the sample volume
Bottom curvature
The headspace vials has a round bottom or a flat bottom. Both types are suitable for injection but round bottom vials tend to be stronger in terms of storage sampling. Therefore, the more reliable work should be the autosampler of the round bottom vials. Round bottom vials are also often subject to higher pressures and are more compatible with applications such as temperature rise and derivatization.
Correct cover clamp
The headspace vials must be properly pressed. Make sure the gland clamp is not properly adjusted. The hat should not affect the use of the vials. To find out more about the proper use of the capper and the headspace vials.
Injection pad selection
Use a suitable temperature-resistant sample pad. Unsuitable injection pads can lead to dissolution, which can lead to contaminated headspace.
Clean vials
This is the end of the introduction of Use of headspace vials and sample pads. I hope it can help you.
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