Separation of some isoquinoline alkaloids (narcotine, chelidonine, dihydrocodeine,
cinchonine, berberine, cinchonidine, papaverine, apomorphine) has been investigated with …

Several methods for the separation of vitamins on HPLC columns were already validated in
the last 20 years. However, most of the techniques focus on separating either fat‐or water …

Pressurized planar electrochromatography (PPEC) was introduced by Nurok et al.[1]. The
mobile phase in PPEC is driven by the electroosmotic effect through the adsorbent layer of …

Since the first publication concerning pressurized planar electrochromatography (PPEC) in
2004 [1], this technique has been used for separation of many various groups of compounds …

This experimental work deals with preliminary studies concerning combined planar
electrophoresis—electrochromatography system involving stationary phases composed of …

A tendency to an increase in migration times was observed when different water-soluble
vitamins were analysed repeatedly in pharmaceutical preparations by capillary …

Separation of 2, 4-dinitrophenyl-5-l-valine amide derivatives of some amino acids (leucine,
isoleucine, valine, asparagine, cysteine, tryptophane) L and D-enantiomers with high …

Vitamins are pivotal ingredients in dietary supplements and nutraceutical products. Since
many vitamins are unstable and rapidly degraded, it's crucial to keep track of their loss …

Separation of several isomer groups, ie diastereomers such as quinine and quinidine,
cinchonine and cinchonidine, R, S-1-(1-naphthyl)-ethanol, R, S-1-(2-naphthyl)-ethanol, and …

In this study, a high-performance thin-layer chromatography (HPTLC)-based method was
developed for the quantification of five water-soluble vitamins, B2, B3, B6, B12, and C, using …