HWAHAK KONGHAK, Vol.24, No.1, 47-51, February, 1986
아민화된 폴리스타이렌 디비닐벤젠 및 4-비닐피리딘계 음이온 교환수지에 의한 붕소동위원소의 농축
The Enrichment of Boron Isotopes by Aminated Polystyrene Divinylbenzene and 4-Vinylpyridine Divinylbenzene Series Anion Exchange Resin
초록
약염기성 음이온교환수지, P-4VPDVB, N-APSTDVB 및 P-APSTDVB를 사용하여 붕소동위원소를 분리하였다. 10 % 과당을 포함한 0.1 M 붕산을 컬럼에 통과시킨후, 순수한 물, 혹은 50 % 메틸알코올 수용액으로 용리하였다. Breakthrough 및 reverse breakthrough 속도는 10 ml/hr이었다. 1 cm2×100 cm의 파이렉스컬럼을 사용하였다. 분별된 용액 중의 붕산의 농도는 중화적정법으로 측정하였으며, 붕소동위원소의 동위원소 존재비는 질량분석기로 분석하였다. 실험의 결과로부터, 물을 용리액으로 사용하였을 때, 붕소동위원소의 분리인자의 값은, P-4VPDVB, N-APSTDVB 및 P-APSTDVB에 대하여 각각 1.0050, 1.0034 및 1.0040이었다. 그리고 용리액으로 50 % 메틸알코올 수용액을 사용하였을 때, N-APSTDVB에 대하여, 분리인자의 값은 1.0036이었다.
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.
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.