METHOD OF DETERMINING CONTENT OF TRIBUTYL PHOSPHATE IN ALIPHATIC DILUENTS Russian patent published in 2007 - IPC G01N33/00 

FIELD: analytical methods.

SUBSTANCE: method comprises treating solution with acid, stirring, and determining tributyl phosphate from the volume of released intermediate layer containing tributyl phosphate. Starting solutions of tributyl phosphate in diluent containing metals and acids are preliminarily treated with alkali solution at alkali-to-sample volume ratio between 4:1 and 3:1, after which resulting solid phase is separated from the mixture and organic solution is treated with chloric, hydrochloric, or sulfuric acid having concentration between 5 and 10 mole/L at acid-to-organic solution volume ratio between 2:1 and 1:1.

EFFECT: reduced inaccuracy of measurement.

4 cl, 1 tbl