| 摘要 |
The invention relates to means of area of analysis of materials through determination of chemical properties of those, in particular to determination of metals in water solutions with atomic-absorption method. Method for determination of lead in water medium includes adding to sample being analyzed non-ionic surface-active substance and azo dye at mixing with formation of alkaline medium with following mix heating and separation of micellar phase obtained and with determination of lead with electro-thermal atomic-absorption method. In the mix obtained one forms pH=9-9.5 with following heating to 70±2 °C, and to micellar phase one includes modifier – potassium dihydrophosphate at volumetric ratio of those (5-10):1, respectively, and determination of lead is carried out at temperature 320-350 °C. The invention provides increase of ecological safety and decrease of time for analysis. |
