-Glindemann PTFE Sealing Rings
-Gastight Allglas-Syringes with
Home - homepage of Dr. Dietmar Glindemann
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Business products: -Glindemann PTFE Sealing Rings -Gastight Allglas-Syringes with |
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Last Update
January 23, 2019 |
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| Internet domains of Dr. Dietmar GLINDEMANN: www.glindemann.net, www.phosphine.net, www.taperjoints.eu | ||||
| Worldwide customers: Glindemann PTFE Sealing Rings are sold worldwide by Sigma-Aldrich in 200 countries (search for "glindemann") and by Carl Roth in 140 countries (not in North America). See table of catalogue numbers of major distributors. Please contact Dr. Glindemann for Glindemann rings if you currently experience ordering problems with our distributors. |
Greaseless high-vacuum seal for conical glass joints. Download PDF Technical Publication 1 (published in journal Fusion of the American Scientific Glassblowers Society ASGS). Download PDF Technical Publication 2 (Flyer with Tips and Tricks) |
  For sale are PTFE-sealing rings, 50 rings on a PP-adapter tube per package. PTFE (polytetrafluorethylene) is equivalent to Teflon® from DuPont. |
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Lowest prices in Europe
and Australia:
Glindemann PTFE Sealing Rings for as low as 15.41 €/pack of 50 rings (August 2016). |
Lab Logistics Group LLG's partners in all
European countries http://www.llg-international.eu/en/partners-by-country.html http://shop.llg.de/info6530_Dichtringe_PTFE_fuer_Kegelschliffe_lang_de.htm Example: Mercateo (a partner of LLG) in all European countries http://www.mercateo.com/p/163-9011664/Dichtringe_fuer_Kegelschliffe_PTFE_NS_14.html As low as 21.28 €/pack (for minimum 4 packs, or 17,42 €/pack (for minimum 40 packs) (Aug. 2016) |
For sale are PTFE-sealing rings, 50 rings on a PP-adapter tube per package. PTFE (polytetrafluorethylene) is equivalent to Teflon® from DuPont. |
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Glindemann Gastight
Allglas-Syringes
(glass syringes) with PTFE-Sealing Ring are sold by Dr. Dietmar Glindemann Please contact Dr. Glindemann at dglinde@aol.com for sizes and a quotation. |
 For hermetic handling of chemicals and environmental samples, syringe pump operation and cold storage. |
 For sale are gastight allglass-syringes, improved with an additional PTFE sealing ring in an additional groove; and replacement sealing rings. |
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Contact:
Dr. Dietmar GLINDEMANN Goettinger Bogen 15 D-06126 Halle Germany |
ph +49-(0)345-6879948, fx +49-(0)345-6871333. E-mail dglinde@aol.com, Internet : www.glindemann.net
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Please contact Dr. Glindemann at if you currently experience ordering problems with our distributors of Glindemann-rings. |
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Schlenk
techniques -
Example
uses of Glindemann-ring (PTFE sealing ring) for conical joint of
Schlenk-flask with air- and moisture-sensitive chemicals Chernichenko, K. et al. Hydrogen activation by 2-boryl-N,N-dialkylanilines:
a revision of Piers’ ansa-aminoborane. Dalton Trans., 2012, 41, 9029-9032,
DOI: 10.1039/C2DT30926B, see Electronic Supplementary Material file:
http://www.rsc.org/suppdata/dt/c2/c2dt30926b/c2dt30926b.pdf.
Chernichenko, K. et al. Metal-Free sp2-C–H Borylation as a Common Reactivity
Pattern of Frustrated 2-Aminophenylboranes. J. Am. Chem. Soc., 2016, 138
(14), pp 4860–4868, DOI: 10.1021/jacs.6b00819, see Electronic Supplementary
Material file:
http://pubs.acs.org/doi/suppl/10.1021/jacs.6b00819/suppl_file/ja6b00819_si_001.pdf. Knudsen, B. P., Chorkendorff, I., & Stephens, I. (2016). Synthesis of Platinum Rare Earth Alloy Catalysts for Fuel Cells. Department of Physics, Technical University of Denmark. http://orbit.dtu.dk/files/127670440/Brian_Knudsen_PhD_Thesis_v1_reduced..pdf
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 Schlenk flask greasefree with Glindemann-ring PTFE (polytetrafluorethylene, equivalent to Teflon® from DuPont). Store or freeze air- and moisture-sensitive chemicals. Stop contamination and leakage by leached-out joint-grease. Improved analytical crystallization, undisturbed by grease contamination of analyzed chemical. |
| Back to top Short description of the Sealing-Ring-Business of Dietmar GLINDEMANN (efficient and economical PTFE Sealing Ring for conical glass joints) Laboratory work with chemical glass equipment and containers often demands hermetic and clean sealing of conical joints and stoppers. Joint grease is not solvent resistant and not clean. The known PTFE-joint sleeves and stoppers are expensive and not very tight. Therefore, a fine PTFE-ring seal on ground tapered glass joints has been developed. The ring is inexpensive, gas-tight, solvent-tight, chemically inert, temperature resistant and prevents freezing of joints. Estimated 1.5 million seals have been tested on the market in the last years. Production: Dietmar Glindemann. Distribution: To see a list of distributors of GLINDEMANN® sealing rings and their catalogue numbers click on the "Business" part of this site. |
| Back to top Short description of the academic scientific work of Dietmar GLINDEMANN Physicochemistry (separation, distillation, chromatography) Trace analysis of volatile toxins, odorants containing heteroelements (sulfides, phosphine, organophosphines and other organoelement compounds) Advanced gas chromatographic trapping techniques GC-ICP interface construction Odor research - chemical analysis of odorants, odor measurement by olfactometry, odor evaluation DMSO (dimethyl sulfoxide) waste residues, DMSO reduction to dimethyl sulfide (DMS) and sewage plant odor  Learn about why metals smell metallic (metallic odor, iron odor, copper odor, odor of money, smell of money... Link to the paper "The Two Odors of Iron..." Artwork: D. Glindemann / Angew. Chem. (click to enlarge) About www.phosphine.net Applying a new developed gas chromatographic trace analytical technique we got extensive knowledge concerning the existence and formation mechanisms of phosphine in the earth’s environment. We discovered phosphine in waste gas, marsh gas, biogas, landfill gas, wetland sediment, soil, intestinal tract of mammals, faecal sludge, animal manure, landfill, technical metals, industrial waste, stone minerals, food and cosmic fall down. It was also found to be a global trace component of the earth’s atmosphere. Do not confuse phosphine (PH3) with phosgene (COCl2, Carbonoxidechloride, Carbonyldichloride, Carbonicaciddichloride). Diphosphine (P2H4 , Diphosphane) a self igniting gas, was found in fermentation experiments using human feacal bacteria. (Publication: Gassmann, G., Glindemann, D.: Phosphane in the Biosphere. Angew.Chem.Intern.Edit. 32 (1993) 761-763.). The results of this publication, phosphine and diphosphine, was discussed in various printed media (John Emsley) and TV media (US discovery channel...) as the igniter of methane gas in human flatus gas (to produce spontaneous human combustion (SHC), an appropriate term for this would be "ignis flatus") and in marsh gas (to form swamp lights named as Will o' the Wisp or "ignis fatuus". A biochemical pathway of how microorganisms could produce enzymes to reduce phosphate to phosphine is still not discovered. |
| Back to top Glassblower Societies worldwide links American Scientific Glassblowers Society British Society of Scientific Glassblowers Belgische en Nederlandse Vereniging voor Glastechniek German Scientific Glassblowers Society, Verband Deutscher Glasbläser e.V Indian Society of Scientific Glass Blowers ( ISSG), Email issg_chennai@sify.com Scientific Glassblowers Society of Australia and New Zealand (SGSANZ) Scottish section of British Glass Society Scottish Glass Society Vereinigung Österreichischer Glasbläser |
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Back to top Keywords: Glass ground conical taper standard joint PTFE sealing ring seal, gasket, socket, sleeve, stopper, plug, leakage, vacuum, pressure, grease, jamming freezing, Schlenk techniques, Schlenk-flask, air sensitive chemicals, moisture sensitive chemicals, Phosphine (CAS. 7803-51-2, PH3, Phosphane), Diphosphine (P2H4 , Diphosphane) toxic, environment, marsh gas, biogas, landfill gas, wetland sediment, air, food, diphosphine spontaneous human combustion (SHC), will o' the wisp, jack o' lantern, Phosgene organometallic, methyl mercury, dimethyl mercury (CAS 62-38-4, 593-74-8.), Organotin, tetramethyl tin (CAS 594-27-4), trimethyl tin (CAS 1066-45-1), Tributyltin chloride ( CAS 1461-22-9), octyl tin, phenyl tin, Tetraethyl lead (CAS 78-00-2), Tetramethyl lead (CAS 75-74-1) |
