Spectrophotometric Determination of Trace Amount of Sulfide by Formation of Iodide and Its Solvent Extraction with Mehtylene Green

Kam, Sang-Kyu; 감상규; Kim, Kyung-Youn; 김경연

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

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7권 3호

PubReader Citation

요오드이온 생성 및 Methylene Green과의 용매추출에 의한 미량 황이온의 분광광도법 정량

Spectrophotometric Determination of Trace Amount of Sulfide by Formation of Iodide and Its Solvent Extraction with Mehtylene Green

분석과학 / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1994, v.7 no.3, pp.261-269

감상규
김경연

감상규, & 김경연. (1994). 요오드이온 생성 및 Methylene Green과의 용매추출에 의한 미량 황이온의 분광광도법 정량. , 7(3), 261-269.

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초록

요오드산 이온의 황이온의 산화에 의해 화학양론적으로 형성되는 요오드이온과 methylene green과의 이온쌍을 1,2-dichloroethane으로 추출하여 656nm에서 분광광도법에 의해 황이온의 정량법을 확립하였다. 시료기질로부터 분리되어지는 황화수소는 pH 3.5 초산 완충용액과 요오드산 이온이 포함된 용액에 도입되어 완전히 전환되었다. 황이온의 정량범위는 $3{\times}10^{-7}{\sim}1.2{\times}10^{-5}M$ ($0.0096{\sim}0.384{\mu}g/ml$) 였으며, 검출한계는 $0.0032{\mu}g/ml$였고, 몰흡광계수는 $6.7{\times}10^4L\;mole^{-1}\;cm^{-1}$였다. 본 정량법을 하천수 중에 응용하였을 때 $5{\times}10^{-6}M$ 농도에서 상대표준편차는 1.59%로 미량에서 공존이온의 영향을 거의 받지 않고 재현성 있는 결과를 나타내므로 실시료 중에 효과적으로 응용할 수 있으리라 생각된다.

keywords: spectrophotometric determination of sulfide, the formation of iodide for sulfide by its oxidation with iodate, methylene green, separation as hydrogen sulfide from sample matrix, solvent extraction

Abstract

The iodide formed stoichiometrically for sulfide by its oxidation with iodate was extracted as an ion-pair with methylene green into 1,2-dichloroethane and the extract was measured spectrophotometrically at 656nm for the determination of sulfide. Hydrogen sulfide separated from the sample matrix was introduced into a solution containing pH 3.5 acetate buffer and iodate, in which the hydrogen sulfide was completely converted into iodide. A linear calibration graph was obtained over the range $3{\times}10^{-7}{\sim}1.2{\times}10^{-5}M$ sulfide($0.0096{\sim}0.384{\mu}g$ of $S^{2-}/ml$) and the detection limit was $0.0032{\mu}g/ml$. The apparent molar absorptivity and a correlation coefficient(r) were $6.7{\times}10^4L\;mole^{-1}\;cm^{-1}$ and 0.999, respectively. When applied to the stream water samples, the proposed method gave a relative standard deviation of 1.59% at $5{\times}10^{-6}M$ sulfide level.

keywords: spectrophotometric determination of sulfide, the formation of iodide for sulfide by its oxidation with iodate, methylene green, separation as hydrogen sulfide from sample matrix, solvent extraction

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요오드이온 생성 및 Methylene Green과의 용매추출에 의한 미량 황이온의 분광광도법 정량

Spectrophotometric Determination of Trace Amount of Sulfide by Formation of Iodide and Its Solvent Extraction with Mehtylene Green

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