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K Volf

Publications and source records attributed to K Volf.

13 recordsLinked to original sources
PubMed1992

[Drug detection using chlorination in thin-layer chromatography].

In order to assess which drugs give a colour reaction on TLC after chlorination and subsequent heating, more than 110 drugs were investigated. It was revealed that the investigated drugs can be divided into four groups: positive after short-term chlorination positive after prolonged chlorination, positive after prolonged chlorination and heating to 150 degrees C, and negative.

Chlorine↗
PubMed1992

[Water as a detecting agent in thin-layer screening of drugs].

For detection of some selected drugs on a thin-layer sprinkling with water was used. White, well defined spots develop on a wet background, which after drying can be further identified by a specific colour reaction or extract for photometric identification.

Chromatography, Thin Layer↗
PubMed1992

[Practical experience in the use of HPTLC for drug screening].

The authors give an account of practical experience with chromatography of drugs using HPTLC. As an indicator berberin hydrochloride or sulphate proved useful. The sandwich method was satisfactory as regards reproducibility of Rf values.

Chromatography, Thin Layer↗
PubMed1992

[Detection of drugs on thin layers using potassium permanganate].

The authors discuss detection of drugs and other substances during thin layer chromatography by means of an aqueous solution of potassium permanganate. Ninety drugs and other substances were divided into three groups: a) strongly reacting, b) weakly reacting, c) not reacting. It was revealed that all compounds containing non-aromatic C = C bonds or oxidizable sulphur react very intensely. Other drugs containing readily oxidized groups react also.

Chromatography, Thin Layer↗
PubMed1984

[Mass poisoning with an agrochemical].

A person showed signs of cholinesterase blockade after having a cup of coffee. Authors succeeded in proving an insecticide Lannate 90 WS in coffee grounds by mass spectrometry and thin-layer chromatography . The compound was later found in a table located in the building where intoxication had occurred and more persons had suffered from a sudden disease with similar signs previously.

Czechoslovakia↗