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5-cyclocholestane and (24R)-24-Ethyl-3
4'-Tetrabromo[13C12]diphenyl ether
Claritas PPT® Grade ICP-MS Instrument Check Standards Set
closure 702026
Layer thickness: 1 mm and particle size is 5–17 µm
Retention gaps, phenylmethyl silylated, low–medium polar 5190-8264 5-cyclocholestane and (24R)-24-Ethyl-3The retention gap technique in combination with on column injection allows concentration of a large sample volume in the capillary column. Retention gaps consist of uncoated (no stationary phase), deactivated fused silica capillary tubing. A retention gap must be inert without any noticeable retention (analytes are not retained). Phenylmethyl (low medium polar) deactivated tubing as an additional choice of surface deactivation. Improve peak shape by
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