Xtrackt Silica (High-Flow, Activated) 500mg/10mL, 50 pkg

XtrackT® large particle bonded phases allow for uniform gravity flow for most blood and urine samples. A single column provides extraction for a broad spectrum of compounds with selective elution of acid, neutrals, steroids and bases. XtrackT® large particle (80–200 μm) silica gels are available with hydrophobic, hydrophilic, ion exchange or copolymeric phases, including DAU mixed mode. XtrackT® is recommended for viscous sample matrices or for gravity flow applications.

Unmodified, weakly acidic silica, very polar. Adsorbs humidity from air, for this reason it should be kept well closed and if necessary dried before use. Due to its high affinity for polar compounds it should not be conditioned with polar (e.g., methanol) or water-containing solvents.

General method for column with 100mg of sorbent

Condition

1 mL Isopropyl alcohol / Dichloromethane

Equilibrate

1 mL Hexane

Load

Pretreated sample

Wash

1 mL 5 % Dichloromethane in Hexane

Elute

1 mL Hexane / Dichloromethane (1 : 1) or Hexane / Isopropyl alcohol (1 : 1)

Recommended applications:

Silica is particularly effective at separating compounds with a very similar structure. Applying the analytes in a non-polar solvent, then increasing the solvent polarity by increasing the concentration of a polar modifier, such as THF or ethyl acetate, delivers effective separations. Suitable for Aflatoxins, Chloramphenicol, Pesticides, Steroids, Vitamins