Knowledge Of Headspace Vial
The sealing property of the headspace vial is better than that of the threaded vial, and the rubber or silica gel has good re-sealing after the puncture, so it is ideal to preserve the reagents. If some of the organic solvents in use will corrode the silicone or rubber bottle pad, the bottle pad with PTFE coating is required, if in use, the reagent is not used up once, but stay in the headspace vial part of the next reuse, then the sample will be volatilized, because the bottle pad with PTFE coating will lose the sealing after puncture.
Characteristic of Headspace Vial
Hawach uses PTFE, silicone rubber or ultrapure silica gel as raw material, the product is non-toxic. Unique white silicone spacer, easier to puncture, protect automatic sampler needle, higher purity, and greatly reduce miscellaneous peaks. The adhesive-free process ensures that the two kinds of materials have good chemical inertness, acid resistance, alkali resistance, high-temperature resistance and anti-adhesion, and the excellent resilience of silicone or silicon layer, which not only ensures the sealing property but also provides softer protection for the needle of the automatic sampler.
Specification of Headspace Vial
The Hawach headspace bottle with a diameter of 10 ml, 22.5ⅹ50 mm, 20 ml, 27.5ⅹ70 mm, which is currently the most commonly used gas-phase injection bottle on the market, and the threaded round-bottom bottle can be said to be an upgraded version of the clamp type, which ensures that it can achieve the original function of the clamp head empty bottle while being able to achieve the purpose of reuse. This sample bottle mating – species 1.3 mm soft gasket can be used as a sample bottle. Additionally, the sample bottle can withstand pressure within 1000 kpa.
The material of Headspace Vial
The material of Hawach Headspace Vials adopts low extractable Borosilicate glass as raw materials, which provides with low expansion rate, high corrosion resistance, good strength, superior hardness, extraordinary light transmittance, and excellent chemical stability. The lid is made of special metal steel, which can be magnetically adsorbed without being easily corroded and changed in shape, while the bottle is designed for the round bottom to have certain automatic injection equipment compatibility while having a flat bottom placement function.
Working Principle of Headspace Vial
The laboratory bottles designed for top space analysis is what we call headspace vials. The essence of this experiment is that the volatile sample is heated and volatilized to form gas in the space at the top of the sample bottle and then diffuse, and finally the top gas in the gas chromatographic bottle above the volatile sample enters the gas phase detection. It is often used to detect volatile substances such as flavor compounds, perfumes, and cosmetics in industrial analysis, gases of polymers and plastics, beverages and food.
Adaptation of Headspace Vial
When detecting high boiling points of volatile or semi-volatile mixtures, we need to heat to vaporize the material at the top. In this process, the material in the headspace vial can eventually be measured without touching the liquid in the sample bottle because its liquid (solid or solid-liquid coexistence) sample is in the bottom position. Headspace vial is most suitable for sample analysis of light component volatiles. This measurement technique can effectively analyze the gas in the top space of the liquid sample and be applied to the solid dispersion method.