Retention gaps, phenylmethyl silylated, low–medium polar pH 7 YELLOW Beveled HS crimp neck

Beveled HS crimp neck

1x Stopcock (valve)

Polymeric combination phase with weak cation exchanger

Ta ICP-MS 130 amu 20 ppt n/a M+ 114Cd16O

C21 Ring-C Monoaromatic sterane (5β(H)

Retention gaps, phenylmethyl silylated, low–medium polar pH 7 YELLOW Beveled HS crimp neckThe 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