Jul 10, 2012 · Abstract. The significant presence of septum-related ghost peaks, causing interference in routine gas chromatography–mass spectrometry analyses at sample injection port temperatures above 100°C, is demonstrated.
Temperature limit for PTFE/Silicone septa: -60°C up to 200°C. Wide Mouth with Preset Cap and Septum Improves Ease of Use ... Mass Spec Quality Certificate Provided.
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Polypropylene 12 x 32 mm Screw Neck Vial, with Cap and Preslit PTFE/Silicone Septum, 700 µL Volume, 100/pk. Ensure all your solvents, solutions, and samples are stored safely within a chemically inert environment with the Polypropylene Screw Neck Vial, with Cap and Preslit PTFE/Silicone Septum. All Waters vials are produced and go through
tan PTFE/silicone septum, septum diam. × total thickness × PTFE thickness 18 mm × 0.060 in. × 2 mil, pkg of 144 ea Mass Spec Quality. Compare Product No ...
PTFE/Silicone Septa: (T/S) High quality, pure silicone is laminated to 0.005” thick PTFE to give a pure, highly inert septum with excellent resealing characteristics even after repeated punctures. PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical.
Jan 13, 2017 · Abstract. Cross-contamination from the polymeric material of the vial caps used in size exclusion chromatography (SEC) and high-performance liquid chromatography autosamplers in the low molar mass (LMM) range (<2000 Da) of polymer samples was demonstrated with the help of matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF MS) analysis.
Jun 9, 2022 · Coring, whether from the sample vial or the injection port septum, will result in an increased number of siloxanes that will manifest themselves as “ghost peaks” (5). Whether it is valve bleed, septum vial bleed, or GC inlet septum bleed, there will be late eluting compounds, with m/z 73 for many of them. Identifying the source of siloxanes
MilliporeSigma™ Supelco™ SS-174 PTFE-Faced Septa. Suitable to overcome the degradation of the septa, due to prolonged high temperatures which occurs in silicone rubber septa. Type. SS-174 Septa. Thickness (English) 123 mil. Temperature (Metric) Max. 300°C. Material.
Thomas®. Available in clear or amber borosilicate glass Choice of 0.125” or 0.100” PTFE/Silicone Septa Available in standard, precleaned or precleaned/certified in accordance with recommended E.P.A. Protocol CLASS 1: (Standard) Containers are assembled with liner and closure without. Compare this item.
Mono-isotopic ion mass (singly charged) Ion type Formula for M or subunit or sequence Compound ID or species Possible origin and other comments 74.06059 [M+H]+ C 3H 7NO Dimethyl formamide Solvent 102.12827 [M+H]+ C 6H 15N TEA Triethylamine, buffer 107.0782 [A 2B+H]+ [C 2H 4O]nH 2O PEG Polyethylene glycol, ubiquitous polyether 123.09222 [M+H]+ C
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
The septum is provided with a thin 0.005” PTFE layer laminated to highly pure silicone, and slit through the center for easier needle penetration and to release the vacuum that forms when a large volume of sample is withdrawn from a vial.
29651-U Certified Vial Kit, Low Adsorption (LA), 2 mL, pk of 100, volume 2 mL, clear glass vial (with marking spot), natural PTFE/silicone septa, thread for 9 mm 12 mm × 32 mm × 6 mm Expand
black polypropylene hole cap, thread for 8-425, PTFE/silicone, Top Hat (septa and closure designed to fit together tightly), for use with 2 mL vial, 4.6 mm opening, pkg of 100 ea. Expand. Hide. 27262. black polypropylene hole cap, thread for 8-425, PTFE/silicone, septum thickness 1.5 mm, for use with 2 mL vial (standard opening), pkg of 100 ea.
Closure contains ultra-low-bleed silicone septa for ultra trace analysis Products are shrink wrapped in order to assure originality, purity and transport safety. Download White Paper: MS Certified Vials: Pre-cleaned and certified vials for mass spectrometry
