Because the sample preparation shaking is to let the measured sample and the reagent to be fully fused, so that the sample in the headspace vial is homogeneous, to ensure the accuracy of the sample tested by the instrument and the reproducibility of the results.

The headspace vial is a high-performance, low-cost, economical injector specially designed for sample preparation in chromatographic analysis. It utilizes headspace technology (gas extraction), eliminating the need for cumbersome sample pre-treatment, and can be used for qualitative and quantitative analyses of volatile components in gases, liquids, or solid samples. It is convenient, less expensive and easy to automate.