A New Tetrafluoroborate Liquid Membrane Electrode For Selective Determination Of Boron

Abstract

The construction and performance characteristics of a new liquid membrane electrode selective for BF^ion are herein described. The electrode incorporates nitron-tetrafluoroborate ion pair complex in nitrobenzene as a liquid membrane. The electrode shows a rapid Nemstian response for BF^ ion over the concentration range of 10" to 10" M and the potential is almost independent of the pH over the range of 3-9. The selectivity coefficient values obtained for 21 different anions and cations show no significant interference. The electrode is satisfactorily used for the determination of 0.5- 500 ;ug/ ml of boron after conversion to BF. ion. The average recovery is 98.8 % and the mean standard deviation being 2.1 %.The electrode is also used for determination of boron in borosilicate glasses.