Nature

Solvent Front Position Extraction and some conventional sample preparation techniques for the determination of coccidiostats in poultry feed by LC–MS/MS

Coccidiostats: maduramycin ammonium, narasin, salinomycin sodium salt, monensin sodium salt, lasalocid A sodium salt, robenidine hydrochloride, dinitrocarbanilide (marker for nicarbazin) and nigericin ...
Nature

Solvent front position extraction with semi-automatic device as a powerful sample preparation procedure to quantitatitation of tryptophan in human plasma

In the paper the results of the tryptophan determination in human plasma samples prepared with the novel Solvent Front Position Extraction (SFPE) technique are presented. The SFPE procedure is used ...