Abstract
A new photometric method for determination of boron with rutin as a color reagent is proposed. For the determination of boron, the sample solution is evaporated with proper amounts of hydrochloric, oxalic acids and rutin reagent solutions. Then, the dried residue is dissolved with acetone, and absorbance of the solution thus obtained is measured at 440mμ. On this study, effects of concentrations of hydrochloric and oxalic acids and of rutin, drying conditions such as temperature, duration of heating and vessels for evaporation are examined respectively. It is found that Beer's law is obeyed over a range of 0.000.30 ppm of boron.
The proposed new photometric method is applied to the determination of trace amounts of boron in samples of graphite for the reactor grade.
