Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Extraction-Spectrophotometric Determination of Mercury(II) using Nicotinaldehyde-4-phenyl-3-thiosemicarbazone

Nicotinaldehyde-4-phenyl-3-thiosemicarbazone을 이용한 Hg(II)의 추출 흡광광도 정량

  • Lee, Jin-Sik (Department of Chemistry, Himeji Institute of Technology) ;
  • Uesugi, Katsuya (Department of Chemistry, Himeji Institute of Technology) ;
  • Choi, Won-Hyung (Department of Chemistry, Kyungsung University) ;
  • Kim, Jae-Soo (Department of Chemistry, Kyungsung University) ;
  • Kim, Do-Hoon (Department of Chemistry, Kyungsung University)
  • 이진식 (일본 병고 희로공대 공학부 기초교실) ;
  • 카츠야 우에스기 (일본 병고 희로공대 공학부 기초교실) ;
  • 최원형 (경성대학교 이과대학 화학과) ;
  • 김재수 (경성대학교 이과대학 화학과) ;
  • 김도훈 (경성대학교 이과대학 화학과)
  • Received : 1994.09.22
  • Published : 1994.12.25
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Abstract

A selective extraction-spectrophotometric method for the determination of mercury(II) with nocotinaldehyde-4-phenyl-3-thiosemicarbazone(NPS) was described. The method is based on the formation of an insoluble mercury-NPS complex, which is extratable into chloroform from an aqueous solution at pH 3.5 by shaking for 3 min. The absorbance is measured at 365nm and the molar absorptivity is $2.45{\times}10^4L\;mol^{-1}\;cm^{-1}$. The complex system conforms to Beer's law for up to $18{\mu}g\;mL^{-1}$ of mercury(II). The proposed method is simple and selective and has been satisfactorily applied to the determination of mercury in standard human hair sample.

새로운 합성 시약 nocotinaldehyde-4-phenyl-3-thiosemicarbazone(NPS)을 이용하여 Hg(II)의 추출 흡광광도 정량법을 검토하여 미량 Hg(II)의 최적 정량조건을 확립하였다. Hg(II)-NPS 착물은 pH가 3.0~10까지 넓은 범위에서 선택성을 가진 안정된 착물을 형성하며, chloroform을 추출용매로 사용하여 365nm에서 측정한 몰흡광계수는 $2.45{\times}10^4L\;mol^{-1}\;cm^{-1}$이며, Hg(II)의 농도가 $0.2{\sim}18{\mu}g\;mL^{-1}$까지 Beer의 법칙을 만족하였다. 또한 본 분석법을 이용하여 두발(표준시료) 중의 수은을 분석하여 양호한 결과를 얻었다.

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