sample preparation flat bottom headspace gas chromatography with silicone septa manufacturer

PURESEP-T™ septa are made of PTFE and polyimide films on silicone rubber bases. PTFE gives maximum inertness and low bleed. Maximum temperature: 437°F (225°C). 25 Aijiren TECHNOLOGIES GC SEPTA GREEN 100/PK NC1435100 GC SEPTA GREEN 100/PK 26 Aijiren TECHNOLOGIES SEPTUM BLEED AND TEMPER 100PK NC1443158 SEPTUM BLEED AND TEMPER 100PK 27

Analytical Vials. Vials play a significant role in analytical analysis and result reproducibility. Vials must be inert and free of extractables or leachables to prevent affecting results. Using certified, application-specific, contaminant-free vials can significantly reduce risk. We offer a broad spectrum of Supelco ® products including

Headspace-gas chromatography (HS-GC) analysis can be applied successfully for the analysis of VSCs in different liquid matrices. It can be also applied in physical chemistry studies of these compounds, being a valuable tool for acquiring data on gas–solid and gas–liquid systems.

Sample preparation methods for GC-MS Gas chromatography mass spectrometry (GC-MS) sample preparation is performed on smaller and more volatile samples including environmental pollutants, industrial byproducts, food contaminants, pesticides, and metabolites of illicit and designer drugs.

Best septa choice when temperatures are over 125°C. Natural PTFE/red silicone – ST3HT High temperature formulated seal with low bleed. Best septa choice when temperatures are up to 300°C. Blue silicone/red PTFE – ST144 Thin 1.4 mm seal with PTFE face. Resealing capability limited due to thinner silicone layer. Aluminum/white silicone – AS3

Apr 2, 2019 · In two general kinds of GC, gas-solid chromatography (GSC) and gas-liquid chromatography (GLC), the mechanisms of analyte retention in the column are thoroughly different. In GLC, the analyte has been participated between a gaseous mobile phase and a liquid stationary phase.

20 mL Clear 22.6 OD Glass Round Bottom Headspace Crimp Top Vials 1000 N9303351 with Write-On Patch and Level Lines* 20 mL Clear 22.6 OD Glass Flat Bottom Headspace Crimp Top Vials 1000 N9303352 with Write-On Patch and Level Lines ** *Recommended for the Shimadzu, Tekmar, and Varian **Recommended for the Aijiren VOA Vials and Caps

The Headspace Sampler is based on Aijiren’s GC and automatic liquid sampler architecture. It provides an inert sample pathway for superior gas chromatography performance without analyte degradation or loss, includes productivity-boosting features, and offers rugged sampling technology to ensure the integrity of every injection.

Headspace is used to analyze volatile compounds in liquid and solid samples that cannot be injected directly into a gas chromatograph (GC). Examples would be creams and lotions, blood, soil, electronic components, and polymers. Headspace sampling can accommodate virtually any matrix. How does headspace sampling work?

Headspace sampling is a type of sample introduction technique for gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS). For headspace techniques, the gas layer, or the headspace above the sample in a vial, is analyzed as opposed to withdrawing a volume from within the sample layer (Figure 1).

Headspace and sample preparation applications: Septa properties Butyl rubber/chlorobutyl rubber An economical choice for low temperature (< 125°C) or low-pressure applications choice. Not suitable for alkanes, benzene, chlorinated solvents or cyclohexane without a protective PTFE layer. Grey bromobutyl stopper – B3P Does not provide PTFE barrier.

Headspace vial caps are available in a variety of materials including aluminum, bimetal, and steel; headspace vial cap septa are available in PTFE/silicone, molded PTFE/butyl, and high-temperature varieties. Our headspace vial caps come in either 11 mm, 18 mm, 20 mm or 22 mm sizes.

Restek has fashioned septa for all major brands of gas chromatographs and injectors. Use our handy septum size chart to determine the septum diameter for your instrument or contact us at 1-800-356-1688 (ext. 4) to discuss your application. Which Septa Should I Use? Thermolite Plus septa are a proven low-bleed champion.

Aug 2, 2022 · A headspace sampling system automates this process by first heating the sample for a measured period of time, and then extracting a small volume of the headspace vapor from the vial and transferring it to the GC column. Figure 3 shows a chromatogram produced from a headspace sample taken from the same sample of perfume that produced Figure 1.

Apr 8, 2018 · My sample is Sodium Starch Glycolate. Here are the parameters Oven: 80C Loop: 90C Transfer Line: 100C Vial Eq time: 45min Vial Pressurization time: 0.2min Injection time: 0.2min Loop fill time: 0.2min Loop Eq. Time: 0.2min GC Cycle time: 22min Shake: High Sample is 100mg of SSG in 20mL headspace vial. Add 5.0mL of DMSO.