Separation of boron isotopes was carried out using P-4VPDVB, N-APSTDVB and P-APSTDVB weakly basic anion exchangers. After 0.1 M boric acid containing 10 % succrose solution was passed through the column, the boric acid band formed on the column was eluted with pure water of 50 % methyl alcohol water solution. The flow rate of breakthrough and reverse breakthrough was 10 ml/hr. The contents of boric acid of the fractions were determined with neutralization titrations.
The relative mass of boron isotopes of the fractions was analyzed on a mass spectrometer. From these experiments, we found that the separation factor of boron isotopes using pure water as eluent for the P-4VPDVB, N-APSTDVB, and P-APSTDVB anion exchangers were 1.0050, 1.0034 and 1.0040, respectively. The separation factor was 1.0036 for the N-APSTDVB using 50 % methyl alcohol water solution as eluent. And therefore, separation factor for the 50 % methyl alcohol water solution as eluting agent is larger then value of pure water.