Determination of total iodide in seawater by gas chromatography-mass spectrometry

Gas chromatography-mass spectrometry를 이용한 해수 중 총 요오드 정량분석

  • Received : 2002.09.24
  • Published : 2002.10.25

Abstract

A sensitive gas chromatographic method has been established for the determination of total iodide in seawater as their volatile organic derivative. The method is based on the formation of 4-iodo-2,6-dimethylphenol with 2,6-dimethylphenol in matrix and a single-step extraction of the derivative with ethyl ether, which are then measured by gas chromatography-mass spectrometry (selected ion monitoring). Iodate in sea water was completely reduced to iodide with ascorbic acid and acetic acid. The detection limit was 0.1 ng/mL in seawater and the calibration curve showed good linearity with r=0.9997. The method was sensitive, reproducible and simple enough to permit the reliable routine analysis of total iodide in seawater. Total iodide in sea water was found about 30 ng/ml.

Keywords

Seawater;iodide;GC-MS;4-iodo-2,6-dimethylphenol

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