Headspace Sampler Overview:
Headspace Sampler eliminates complex, error-prone steps for other GC sample processing techniques. It allows you to get a lot of useful information in a short period of time.
From the current market products, the headspace sampler can be divided into manual type, fully automatic type and semi-automatic type.
Headspace sampler manual type:
It has a heating oven with several heating holes on it and a gas-tight glass syringe with a glass syringe and a thermal insulation sleeve. This device is characterized by a low price and usually the 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.
Headspace sampler semi-automatic:
To have a constant temperature topping bottle requires the user to manually put them into the constant temperature furnace to balance until the balance time is up to have a manual or manual insertion of the sampling 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.
Headspace sampler fully automatic:
After the headspace bottle is sealed, the handpiece is placed on the conveyor belt or the turntable. The headspace bottle will automatically enter the oven after the thermostat time according to the user's programmed time sequence.
There are two points to be aware of when purchasing a headspace sampler (manual, fully automatic, semi-automatic), as detailed below:
The first point to be aware of when purchasing a headspace sampler:
The repeatability of the injection results is that the concentration of the RSD calibration sample is less than three thousandths. This indicator is a key indicator for the evaluation of the headspace sampler. The most basic RSD for a qualified headspace sampler should be less than 3%. This is not a problem for some manufacturers, but it is also falsely promoted for sales. Therefore, the user should ask the manufacturer for the original spectrum and technical data when selecting the purchase. If it can't be provided, it proves that the manufacturer is making false propaganda.
The second point must be noted when purchasing a headspace sampler:
The temperature control range and control accuracy of the headspace thermostat furnace (including the temperature stability and the deviation of the temperature gradient set value from the actual value) can be as high as 180 °C and can be achieved at 200 °C. It is a little far-fetched to go beyond 200 °C to the headspace injection. The temperature range is usually from 10 ° C to 150 ° C above room temperature.
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