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Es ist eine polarographische Methode zur Bestimmung von Natrium-2,2-dichlorpropionat im technischen Produkt nach vorangegangener Abtrennung durch Papierchromatographie ausgearbeitet worden. Die 2,2-Dichlorpropionsaure wird aus dem Chromatogramm eluiert und nach der Hydrolyse zu Brenztraubensaure polarographisch bestimmt.

Two methods for the chromatographic separation of technical 5-amino-4-chloro-2-phenyl-3(2H)-pyridazinone (PCA) were developed. These methods also permit the quantitative determination of its isomer (4-amino-5-chloro-2-phenyl-3-(2H)-pyridazinone, iso-PCA) and 4,5-dichloro-2-phenyl-3(2H)-pyridazinone (PCC). The mobile phase for the thin-layer chromatography was chloroform with 1 % methanol, while for the column chromatography benzene with increasing chloroform content was used. In both methods aluminium oxide was used as adsorbent. The isolated compounds were dissolved in methanol and diluted with water. The absorbances were measured at the wavelength of absorption maximum. It was found that PCA has two crystalline modifications and that the compounds described are polarographically active.

The paper presents two different analytical approaches for the determination of Trimorfamid, direct GLC for technical products and combined polarography with subsequent TLC, for the qualitative and quantitative analysis of technical concentrates. Standard deviations are in the range of 0.1–0.2%.