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Rapid determination of monensin and nigericin in medical premixes and in growth-promoting feed preparations.

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The determination of benzalkonium chloride in eye-drops by difference spectrophotometry.

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A systematic study of the desorption of different ion-pairing reagents on reversed phase thin-layers

SummaryThe absolute concentrations and the concentration distribution of different cationic ion-pairing reagents, such as tetramethylammonium bromide, tetrabutylammonium bromide,…
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Determination of p-hydroxyphenoxymethylpenicillin in phenoxymethylpenicillin by derivative spectrophotometry

A spectrophotometric method has been developed for the determination of p-hydroxyphenoxymethylpenicillin in samples of phenoxymethylpenicillin via the fourth-derivative spectra. The data were…
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Attempts for the chromatographic separation of D- and L-penicillamine enantiomers

SummaryThe chromatographic characteristics of the thiazolidine carboxylic acids formed by the reaction of D- and L-penicillamine with various substituted benzaldehydes and heterocyclic aldehydes have…
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Study of the retention behaviour of barbiturates by overpressured layer chromatography using silica gel bonded with tricaprylmethylammonium chloride

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Simple, rapid determination of vitamin C in cottage-cheese desserts by using a Landolt reaction

Abstract A simple, fast analytical procedure is reported for the determination of vitamin C in a cottage-cheese dessert. The method was developed on the basis of the bromate ion — iodide ion —…
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Retention behavior of several natural and semisynthetic penicillins and cephalosporins by means of OPLC, using silica gel impregnated with TCMA

Determination of boron impurities in syrups containing lactulose.

An analytical method for the determination of boron content of crude and finished syrups containing lactulose has been described. A coloured complex of boron formed with azomethine-H is used for the…
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OPLC study of retention of 2,3-dihydro-1,5-benzothiazepines on layers impregnated with tricaprylmethylammonium chloride

SummaryThe retention behaviour of various 2,3-dihydro-1,5-benzothiazepines was investigated by means of overpressured layer chromatography on silica gel and on alumina layers impregnated with…
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