Analytical applications of alkali metal tetrahydridoborates

The analysis of physicochemical, thermodynamic and analytical properties of alkali metal tetrahydridoborates is made. The crystal structure of the compounds, their state in different solutions, ways of their preparation are considered. A conclusion is made that alkali metal tetrahydridoborates are of interest as reagents able to reduce ions of many element to different oxidation degrees. They also can be used as titrants. The use of the reactions with the participation of NaBH4 and KBH4 to develop highly sensitive methods of kinetic determination of ultralow amounts of alements is very perspective