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18mm Screw Thread Headspace Caps and Septa for PERKINELMER
https://www.hplcvials.com/products/6-20ml-gc-headspace/18mm.html

18mm Screw Thread Headspace Caps and Septa for PERKINELMER

With the use of headspace vials, the whole experiment can be prepared for analysis in an efficient and accurate way. The essence of this experiment is that the volatile sample is heated and vaporized to form a gas in the top space of the headspace vial and then diffuses. Finally, the gas in the vial enters the gas phase detection.

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