Hisae Yoshidome

Polyamide layer chromatography of organophosphorus pesticides

Abstract The separation of nineteen organophosphorus pesticides by one-dimensional and two-dimensional chromatography and their detection on polyamide layers were investigated. A comparison was made between the detection limits on polyamide and silica gel layers, and this showed the advantages of polyamide layer chromatography. Some correlations between the chemical structure of the samples and their RF values on polyamide layers and their connection with the type of solvent system used were discussed.

Separation and detection of carbamates and related compounds on polyamide layers

Abstract The separation and detection of 22 carbamates and related compounds including insecticidal or herbicidal materials, in current use, were investigated on polyamide layers. Suitable solvent systems and the R F data obtained were reported. A new spray reagent, Pinacryptol Yellow, was examined for the detection of these compounds and its usability was ascertained. A comparison was also made between the detection limits by UV absorption on polyamide and silica gel layers, and the superiority of the polyamide layers was confirmed.

Chromatography of food preservatives on polyamide layers and columns.

Abstract The separation of eight kinds of food preservative by one- and two-dimensional chromatography on polyamide layers was investigated. A comparison was made between the detection limits on polyamide and silica gel layers, and the superiority of the polyamide thin layers was confirmed. The separation of the food preservatives on a polyamide column with two types of elution system was established. The recovery of these compounds was satisfactory.

Studies on the Quantitative Analysis of Cyclamate

A new method for quantitative analysis of cyclamate was described. Equimolar cyclohexylamine and inorganic sulfate were formed with the pyridine-catalyzed hydrolysis of cyclamate, and each of the hydrolytic products was estimated by the known analytical methods. The optimum conditions and the effects of various coexistent substances on this analytical method were investigated.