form
solid
packaging
bottle of 75 cc
parameter
250 °C temp. limit
technique(s)
gas chromatography (GC): suitable
surface area
~550 m2/g
matrix
Porapak QS
particle size
100-120 mesh
density
~0.34 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.
Application
Porapak™ QS packed column maybe used for gas-solid chromatographic determination of moisture in lyophilized pharmaceutical products.
Other Notes
Porapak QS 是硅烷化的 Porapak Q，用于降低表面吸附。
Legal Information
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)
G W Lyman et al.
Journal - Association of Official Analytical Chemists, 62(1), 71-74 (1979-01-01)
A gas-solid chromatographic procedure is described for the analysis of low levels of moisture in individual lyophilized vials of pharmaceutical products. Dry ethanol, which contains methanol as the internal standard, is injected through the septum of the vial to dissolve
Grob RL and Barry EF.
Modern Practice of Gas Chromatography, 79-83 (2004)
Poole C.
Gas Chromatography, 127-130 (2012)
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