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Dimethyl modified silica phase for SPE
14-cis-eicosadienoate
purified ion m/z 424 (heptamethyl)
resistance -60 °C up to 200 °C / analytical purity - high / easy to medium hard to penetrate / low resealability
Pentabromodiphenyl ether
Retention gaps, CW (carbowax, polyethylene glycol), polar ICP-33N-5 Dimethyl modified silica phase forThe 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). Carbowax (CW, polyethyleneglycol, polar) deactivated is suitable for direct aqueous injection. Improve peak shape by