产品名称
Porapak™ 多孔聚合物吸附剂, matrix Porapak R, 50-80 mesh, bottle of 75 cc
form
solid
packaging
bottle of 75 cc
parameter
250 °C temp. limit
technique(s)
gas chromatography (GC): suitable
surface area
~525 m2/g
matrix
Porapak R
particle size
50-80 mesh
density
~0.32 g/mL (free fall density)
Quality Level
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General description
Porapak多孔聚合物是一种球形珠粒，具有一致的粒径、孔隙率和表面积，有助于确保分析的精确度和准确度。
有关我们任何吸附剂的更多信息，请访问 sigma-aldrich.com/adsorbents
有关我们任何吸附剂的更多信息，请访问 sigma-aldrich.com/adsorbents
Porous polymers are the most suitable adsorbent for applications based on the analysis of gases, acids, amines, organics of low carbon number and water. They are best suited for gas chromatography and are basically copolymers of polydivinylbenzene (DVB) which are very porous in nature ranging from mesoporous to microporous. Porapak™ R is a porous polymer composed of vinyl pyrollidone mainly suitable for the separation of ethers and esters.
Application
Porapak™ R with Amberlite™ XAD-4 maybe useful for chromatographic sampling of polar and nonpolar low-volatility compounds.
Legal Information
Amberlite is a trademark of DuPont de Nemours, Inc.
PoraPak is a trademark of Waters
存储类别
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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The walnut twig beetle, Pityophthorus juglandis Blackman, and its associated fungal pathogen that causes thousand cankers disease, currently threaten the viability of walnut trees across much of North America. During a 2011 assessment of seasonal flight patterns of P. juglandis
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Extracellular pH is usually maintained around 7.4 in multicellular organisms, and cells are optimized to proliferate under this condition. Here, we find cells can adapt to a more acidic pH of 6.5 and become addicted to this acidic microenvironment by
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