FIELD: chemistry.
SUBSTANCE: method of simultaneous determination of methanol and diethylene glycol in natural and sewage water by LC method with separation of said components in chromatographic column in flow of eluent, which represents sulphuric acid solution in deionised water with molar concentration 2.5 mmole/dm3; registering difference of indices of refraction of eluent solution and solutions, which contain target components and processing results of measurements by method of absolute calibration. Sample preparation does not require dilution of analysed water sample up to content of target components 10 g/dm3, more concentrated samples are diluted with deionised water.
EFFECT: quickness and simultaneousness of determination of diethylene glycol and methanol content.
