METHOD FOR SIMULTANEOUS DETERMINATION OF DESMEDIPHAM AND PHENMEDIPHAM IN SOIL Russian patent published in 2011 - IPC G01N30/00 

FIELD: chemistry.

SUBSTANCE: method for simultaneous determination of desmedipham and phenmedipham in soil involves preliminary extraction with an organic solvent. Extraction is carried out in acetone at temperature which is 5°C lower than the boiling point of the solvent. The extract is then analysed using a gas chromatography technique. The advantage of the disclosed method of determining desmedipham and phenmedipham lies in simplification of the method by cutting the number of operations and analysis time. Substance is extracted from the soil in a single cycle and the extract undergoes gas chromatographic analysis. According to the disclosed method, total duration of sample preparation is cut down to 60 minutes and duration of gas chromatographic analysis is cut down to 4.5 minutes. The lower detection limit for each substance is 0.2 mg/kg and analysis is cheap and rapid.

EFFECT: simplification of the method by reducing the number of operations and analysis time, and possibility of simultaneous analysis of two pesticides with similar properties.

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