Now showing items 21-30 of 1375
Solid phase extraction of halogenated, organophosphorus and nitrogen-containing pesticides from river water samples. Analytical quality parameters
A study of matrix effects arising from river water samples using C18 SPE columns in the determination of 38 pesticides having different chemical properties is presented. Recoveries from river water samples of different ...
An SPME-GC-MS method for determination of organochlorine pesticide residues in medicinal plant infusions
Rotating disk sorbent extraction for pre-concentration of chromogenic organic compounds and direct determination by solid phase spectrophotometry
A novel and very simple microextraction approach for pre-concentration and direct solid phase spectrophotometric measurement has been developed for the determination of chromogenic analytes. The model analyte to assess ...
Determination of manganese by flame atomic absorption spectrometry after its adsorption onto naphthalene modified with 1-(2-pyridylazo)-2-naphthol (PAN)
(Elsevier Science BvAmsterdamHolanda, 2007)
A simple method to separate red wine nonpolymeric and polymeric phenols by solid-phase extraction
(American Chemical Society, 2007)
Solid-phase extraction of metal ions from fuel ethanol with a nanostructured adsorbent
This work describes the synthesis and characterization of a new octakis[3-(2,2'-dipyridylamine)propyl]octasilsesquioxane (T8-Pr-DPA), and a study of the metal ion preconcentration in fuel ethanol. Batch and column experiments ...