27232

Supelco

Stoppers

stopper diam. 20 mm, gray butyl rubber, pkg of 100 ea

Synonym(s):
PK100 20MM BUTYL SEPTA

material

gray butyl rubber

packaging

pkg of 100 ea

O.D.

20 mm

stopper diam.

20 mm

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General description

Gray butyl rubber stoppers contain zinc in the form of zinc-oxide. Choosing a suitable stopper material is very essential for studies related to denitrification coupled to methane oxidation. In some cases stoppers are replaced with sterile PTFE mininertvalves or PTFE-faced grey butyl rubber stoppers, for containment of voltiles.

Application

Gray butyl rubber stopper was used to seal the serum vials for isotopic analyses of CH4, during an experimental study done to determine the concentration and carbon isotopic composition of dissolved methane in porewaters. It may also be used to seal aluminium tubes containing growth media, used for assaying conditions for carbon monoxide oxidation by Clostridium thermoaceticum and Clostridium formicoaceticum.
Certificate of Analysis
Certificate of Origin
G B Diekert et al.
Journal of bacteriology, 136(2), 597-606 (1978-11-01)
Cultures of Clostridium formicoaceticum and C. thermoaceticum growing on fructose and glucose, respectively, were shown to rapidly oxidize CO to CO(2). Rates up to 0.4 mumol min(-1) mg of wet cells(-1) were observed. Carbon monoxide oxidation by cell suspensions was...
Protein Formulation and Delivery.
Eugene J
Science, 147-147 (2007)
Sasha D Hafner et al.
Waste management (New York, N.Y.), 91, 147-155 (2019-06-18)
This work focused on identification and quantification of systematic sources of error in manometric measurement of biochemical methane potential (BMP). Error was determined by comparison to gravimetric measurements and direct measurement of leakage. One out of three types of septa...
Determination of concentration and carbon isotopic composition of dissolved methane in sediments and nearshore waters.
Brian PN
Analytical Chemistry, 67 (2), 405-411 (1995)
T A Lewis et al.
Applied and environmental microbiology, 59(5), 1635-1641 (1993-05-01)
Pseudomonas sp. strain KC was grown on a medium with a low content of transition metals in order to examine the conditions for carbon tetrachloride (CT) transformation. Several carbon sources, including acetate, glucose, glycerol, and glutamate, were able to support...

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