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Boron Separation by the Two‐step Ion‐Exchange for the Isotopic Measurement of Boron
Author(s) -
Wang QingZhong,
Xiao YingKai,
Wang YunHui,
Zhang ChongGeng,
Wei HaiZhen
Publication year - 2002
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20020200110
Subject(s) - amberlite , boron , chemistry , elution , ion exchange resin , ion exchange , extraction (chemistry) , isotopes of boron , inorganic chemistry , fractionation , chromatography , nuclear chemistry , radiochemistry , ion , adsorption , organic chemistry
An improved procedure for extraction and purification of boron from natural samples is presented. The separation and purification of boron was carried out using a boron‐specific resin, Amberlite IRA743, and a mixed ion exchange resin, Dowex 50W × 8 and Ion Exchanger II resin. Using the mixed ion exchange resin which adsorbs all cations and anions except boron, the HCl and other cations and anions left in eluant from the Amberlite IRA 743 were removed effectively. In this case, boron loss can be avoided because the boron‐bearing solution does not have to be evaporated to reach dryness to dislodge HCl. The boron recovery ranged from 97.6% to 102% in this study. The isotopic fractionation of boron can be negligible within the precision of the isotopic measurement. The results show that boron separation for the isotopic measurement by using both Amberlite IRA 743 resin and the mixed resin is more effective than that using Amberlite IRA 743 resin alone. The boron in samples of brine, seawater, rock, coral and foraminifer were separated by this procedure. Boron isotopic compositions of these samples were measured by thermal ionization mass spectrometry in this study.