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The Importance of Vial Septum Caps in Forensic Sample Analysis
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Jul 22, 2020 · Use proven vial and septa types. Minimize vial storage period to preferably <1 mo. Overpressurize vials (1.6 times vial volume) to ensure sample integrity. Include sample storage tests in gas analysis batches by including storage of a range of standard gases. Pay close attention to quality checking of sample integrity when storage is longer
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Vial size 10 mL Vial shaking Off Caps PTFE lined Vial standby flow 20 mL/min Vial equilibration time 7.00 minutes Inject time 1.00 minutes GC cycle time 4.50 minutes Oven temperature 70 °C Loop temperature 80 °C Transfer line 0.53 mm id, deactivated fused silica through septum Transfer line temperature 90 °C Vial fill pressure 15 psi
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The quality and selection of consumables used in chromatographic analyzes directly affect parameters such as analysis accuracy and reproducibility. Thus, sample vials used in chromatography are generally produced from first class hydrolytic glass or high purity Polypropylene (PP) materials. Choosing the right septum is very important to prevent contamination and to prevent damage to device
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Jun 28, 2018 · Due to the importance of obtaining accurate and precise concentration data and extensive use of static chamber methodology for calculation off GHG fluxes , this study examined effects of storage temperature and time on CO 2, CH 4, and N 2 O concentrations in septa-capped vials. Significant effects of both storage time and temperature were observed.
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An experiment is a multifactorial process, and assigning the effects of errors or failures from each small element can be a challenge. When a chromatography system is underperforming from a physical issue with a sample vial, cap, or septum, autosampler misalignments, crashes or hangs that cause sequence problems can result.
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An important property of a vial cap is the ability to maintain the vial analyte concentration after multiple injections over time. This ability is influenced by different factors such as the volatility of the analyte/diluent, the number of injections, the elapsed time and the injector/cap septum used.
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Jan 2, 2006 · Figure 3 - Typical mass chromatogram of volatile residue in hexane caused by PTFE/silicone septa: a) hexane extract of a piece of septum; b) vial septum was punctured once by a syringe to sample 1 μL hexane for GC analysis; c) hexane in the last vial was reanalyzed after 3 days; and d) analyzed immediately after 100 μL hexane was added from one vial to another (the septum was punctured 10
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when choosing the correct vial for your application: the septum, the closure and the vial itself. Read through the selection options to determine the proper combination for your application. For your convenience, Waters offers many of these choices as combination packs. The vial, cap, and septum come pre-packaged as packs of 100 for ease and
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Vials with Limited Volume Inserts installed decreases the prep time per sample. • Component kits offer the convenience of one product number for the vial cap and septa. Components are packaged to work with the unique MicroLiter Dispenser. • Assembled kits are shipped with the septa installed in the cap and the cap screwed on the vial.
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Caps/Septa for 1.5mL screw vials, 100/pack Temperature limit for PTFE/Rubber septa: -40°C up to 110°C Temperature limit for PTFE/Silicone septa: -60°C up to 200°C Part number Cap Septa Material & Color Septa Thickness Septa Durometer Size 220-97331-27 Red PP, Center hole Silicone (White)/PTFE (Red) 1.3 mm 45° shore A ND 9 (9mm)
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The septum forms a barrier between your sample analyte in the vial and the outside atmosphere. This barrier protects your sample from external contamination while allowing a needle (from a manual or automatic syringe) to enter the vial, and extract the sample for the next stage of separation.
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The Aijiren Technologies 20 mm solvent vial cap has the capacity to hold 5 mL and 10 mL sample vials. The cap is made from strong polypropylene and the clear color at the top provides good visibility. Application: For use with 8010-0416 & This product is only available to U.S. Domestic. Compare this item.
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5182-0551: 4 mL wash vials with fill markings and caps, 25/pk 0 -40180: Diffusion inserts with black open top screw caps, 12/pk Washes and Pumps: Diffusion Caps Diffusion caps are important • Reduce volatile solvent diffusion • Better alternative than using vial septa, which will core, contaminate wash solvent vial →septum bleed peaks
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2. 1,000 Vial + Cap Kits will have 5 sets of two-compartment boxes plus one box of caps Our 100/pk Vial Kits also come in these two-compartment boxes, with caps on one side and vials in the other (as pictured). Two-Compartment Boxes Vial Dispenser 8 Note: Verex products with this symbol come in a convenience kit carrier box
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