후세척-이온크로마토그래피를 이용한 형석 광산 폐수 중 플루오라이드 정량
Determination of fluoride in fluorite mine wastewater by ion chromatogaraphy with post-wash technique
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Abstract
Simple post-wash method by ion chromatography (IC) was established for the rapid and precisedetermination of fluoride ion in wastewater from mine in fluorite mineralized area. High sulfate in sample wasretained in a pre-column and less strongly held fluoride ion was transferred to the principal separation systemusing modified conventional IC with switching technique. An analytical column with high capacity (AS 9 HC)was used as a pre-column to retain the amount of high sulfate. A guard column (AG 14) as a separation columnfluoride ion with one detector and the observation of sulfate peak with another conductivity detector, the optimumswitching time of 10-port chromatographic injector was 4.3 min. The limit of detection (S/N = 3) of fluoridein synthetic solution containing 500 mg L1 sulfate was 2.4 g/L, with 25 L sample volume.
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