Extraction and chromatographic separation of fat-soluble vitamins is a challenging task, due
to the sensitivity of these compounds towards light, oxygen, heat and pH. In light of this …

Chromatographic methods for the determination of water-and fat-soluble vitamins in foods
are reviewed. For each vitamin, sample preparation, detection problems and …

Since the development of the transistor in 1948, analytical research has led to tremendous
advances in instrumental techniques for organic analysis, particularly in the areas of …

Recent advances in analytical chemistry have turned it into a virtually unrecognizable
science compared to a few decades ago, when it lagged behind other sciences and …

Supercritical fluid extraction (SFE) is a relatively new technique in the field of analytical
chemistry, having evolved in the last decade as an alternative method of preparing samples …

La evolución de la Química analítica en las últimas décadas la hace actualmente casi
irreconocible respecto a su situación a mediados de este siglo, época en que su desarrollo …

After a brief description of the basic principles of supercritical fluid extraction (SFE), this
review extensively discusses the application of SFE via its off-line and on-line coupling to …

This chapter includes the aspects of Menadione (vitamin K). The drug is synthesized by the
use of itaconic acid obtained through Friedel–Craft condensation or by direct oxidation of the …

Abstract Vitamin K 3 (VK 3), a synthetic blood coagulation vitamin with fat-solubility, easily
results in side-effect in animal body due to its toxicity and improper addition of animal …

Synthetic vitamin K3 (VK3, 2-methyl-1, 4-naphthoquinone, or menadione) has been found to
exhibit antitumor activity against various human cancer cells at relative high dose. Parallel to …