Thin layer chromatographic screening for methaqualone, phenothiazines, opiates and benzodiazepines.

A method is described which permits the simultaneous detection of methaqualone, phenothiazines, opiates and benzodiazepines in urine. Its diagnostic application is discussed. After cleavage of conjugates with hydrochloric acid, the substances are extracted and identified by thin-layer chromatography.

[Thin layer chromatography screening test for semiquantitative detection of 4-hydroxy-3-methoxy mandelic acid (HMMA) in urine without extraction (author's transl)].

A thin layer chromatography (TLC) screening test is described, which allows the semiquantitative determination of HMMA in urine samples. From the collected 24 hour urine a measured sample is applied without extraction to a special TLC plate, which is developed in one dimension. In comparison to a series of graded standard solutions the daily HMMA output can be estimated semiquantitatively.

Kinetic determination of glucose concentrations with glucose dehydrogenase.

A manual version and mechanized versions for several types of analyzers are described for the kinetic determination of glucose with glucose dehydrogenase. Results of glucose determinations with and without deproteinization of samples are discussed. The correlation of results with the hexokinase method is shown.