Chromatographic techniques in the analysis of organochlorine pesticide residues

The international polar year (IPY) circumpolar flaw lead (CFL) system study: The importance of brine processes for α‐ and γ‐hexachlorocyclohexane (HCH) accumulation or rejection in sea ice

“…Cartridges were stored at -20°C prior to laboratory analysis. the main steps of the laboratory procedure included elution of SPE cartridges with approximately 40 mL of acetone, transfer into iso-octane by adding 1 mL of this solvent to the acetone extract previously rotor-evaporated to 3 mL, vortexing and transferring the more non-polar phase (top phase) into the new test tube, rinsing the acetone phase with hexane three times, reducing the volume of the solvent mixture to 1 mL under the nitrogen flow, and cleaning up the solution with 0.5 mL of concentrated sulphuric acid (Mukherjee and Gopal, 1996). Ice algae samples were filtered through 0.7 μm pre-combusted and pre-weighed GFF filters (Whatman) and stored at -20°C.…”

A gradual advancement of the extraction and cleanup techniques for residue analysis of pesticides in food matrices and liquid products: a review

“…It allows the extraction and concentration to be focused in a single step. SPME consists of two separate steps: an extraction (retention of the analytes on the stationary phase) and a desorption step 53 . Both steps must be optimized for a successful procedure.…”

Evaluation of the Contamination by Herbicides in Olive Groves

“…This separation includes extraction, pre-concentration and clean-up steps, although sometimes they can be performed at the same time (Gilbert-López et al, 2009;Mukherjee & Gopal, 1996).…”

“…However, the most common ones are solid-liquid or liquid-liquid extraction, gel permeation-chromatography (GPC) and solid-phase extraction (SPE) (Gilbert-López et al, 2009;Mukherjee & Gopal, 1996;Walters, 1990).…”