METHOD OF EXTRACTION-PHOTOMETRIC DETERMINATION OF LEAD

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 ways u044du043au0441u0442u0440u0430u043au0446u0438u043eu043du043du043e - photometric u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 lead in the natural and technical facilities. the way includes the provisional extractions crown ethers like 18 crown 6 from solutions containing 1 to 5 m nitric acid and 0.1 to 0.5 m u0441u043eu043bu00a0u043du043eu0439, introduction u0434u0438u0442u0438u0437u043eu043du0430, u0442u0440u0438u044du0442u0430u043du043eu043b amin to concentration of 0.45 - 0.75% ethanol to concentrations of 2.5 - 5.0%, and the subsequent measurement of the optical density.the definition is 10000 times the amount of alkali metals, u043au0430u043bu044cu0446u0438u00a0, u043cu0430u0433u043du0438u00a0, cobalt, u043du0438u043au0435u043bu00a0, u043au0430u0434u043cu0438u00a0, manganese, iron and bismuth, 1000 multiples of the number of silver , u0441u0442u0440u043eu043du0446u0438u00a0, zinc, copper and u0430u043bu044eu043cu0438u043du0438u00a0, 10 multiples of mercury, 5 u0442u0430u043bu0438u00a0 multiples. 1 u0438u043b., 2 table.