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Headspace Sampler eliminates complex, error-prone steps for other GC sample processing techniques hplc autosampler vials china . It allows you to get a lot of useful information in a short period of time. The classification of the headspace sampler can be divided into manual type, fully automatic type and semi-automatic type.
Manual type
It has a constant temperature furnace with several heating holes on it. It is equipped with a gas-tight glass syringe. The glass syringe has a thermal insulation sleeve. This device is characterized by cheap prices. The usual price should be in the thousands. However, the repeatability of the injection results is entirely dependent on the experience and level of the operator. In addition, the temperature range is not too high by the material of the glass syringe.
2. Semi-automatic type
With a constant temperature furnace, the headspace bottles need to be manually placed in a constant temperature furnace to balance. Wait until the balance time is up, there is a process of manually or manually inserting the needle into the headspace bottle. The sampling and injection process is completely controlled by the machine's own sequence, and the sampling and injection system can set the temperature to prevent the sample from condensing during transport.
3. Fully automatic
After the headspace bottle is sealed, it is manually placed on the conveyor belt or the turntable. The headspace bottle will enter the constant temperature furnace according to the time sequence compiled by the user. After the constant temperature time, the robot automatic sampling system will automatically inject the sample.
The choice of headspace sampler should pay attention to 2 points
Point 1
Repeatability of the injection results, this indicator is a key indicator for the evaluation of the headspace sampler. The basic RSD of the qualified headspace sampler Zui should be less than 3% on this indicator, so when selecting the purchase, the user should ask the manufacturer for the raw spectrum and technical data.
Point 2
The temperature control range and control hplc autosampler vials china accuracy of the headspace thermostat furnace are also a key indicator.
This is the end of the introduction of The choice of headspace sampler should pay attention to 2 points. I hope it can help you.
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