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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 38, Number 7
JKCSEZ 38(7)
February 20, 1994 

 
Title
Determination of Uranium and Thorium in Natural Ground Water by Reversed Phase Liquid Chromatography

역상액체크로마토그래피에 의한 지하수 중 U 및 Th의 분리정량
Author
Chang Heon Lee, Kih Soo Joe, Moo Yul Suh, Won Lee

이창현, 조기수, 서무열, 이원
Keywords
Abstract
염의 농도가 큰 시료용액중에 미량으로 함유되어 있는 U(Ⅵ)과 Th(Ⅵ)을 액상크로마토그래피로 동시에 분리, 정량하였다. 약 2ml의 시료를 pH5.5의 0.11M α-HIBA 용리액과 함께 C18 역상농축컬럼에 통과시켜 U(Ⅵ)과 Th(Ⅵ)을 농축시켰으며, 농축된 이들 원소들을 다시 비활성 C18 역상분리컬럼에서 pH3.0의 0.17M α-HIBA/0.0038 M 1-pentanesulfonate 용리액으로 각각 분리하였다. 분리된 이들 원소들은 Arsenazo Ⅲ를 사용하는 postcolumn반응으로 검출되었으며, 검출한계는 두 원서 모두 1ppb이었다.

The measurement of trace amounts of uranium(Ⅵ) and thorium(Ⅵ) in the solutions containing high concentration of dissolved salts was carried out. The procedure using reversed phase liquid chromatography with trace enrichment techniques has been developed to cope with the high salt content of the samples. 2 ml of sample were passed through a small C18 reversed phase enrichment column with α-HIBA eluent (0.11 M, pH 5.5) where the uranium and thorium were separated from other constituents and concentrated. The uranium and thorium were then backflushed from the column onto a deactivated C18 reversed phase analytical column where furthe separation was achieved with a mixed eluent (pH3.0, 0.17M α-HIBA/0.0038 M 1-pentanesulfonate). The separated species were determined spectrophotometrically by postcolumn reaction with Arsenazo Ⅲ, the chromogenic reagent. Detection limits were found within 1 ppb range for both species.

Page
502 - 508
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