On-site Catalytic Determination of Trace Chromium(VI) in Fresh Water Using <i>o</i>-Phenylenediamine–Hydrogen Peroxide Reaction
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- SHINDO Junpei
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi Environmental Technology Center Co.,Ltd.
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- KAWAKUBO Susumu
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi
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- YAMANOI Takashi
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi
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- SUZUKI Yasutada
- Center of Instrumental Analysis, University of Yamanashi
Bibliographic Information
- Other Title
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- <i>o</i>-フェニレンジアミン—過酸化水素反応を利用する淡水中の極微量クロム(VI)の接触定量と現場分析
- o-フェニレンジアミン-過酸化水素反応を利用する淡水中の極微量クロム(Ⅵ)の接触定量と現場分析
- o-フェニレンジアミン-カサンカスイソ ハンノウ オ リヨウ スル タンスイ チュウ ノ キョクビリョウ クロム(Ⅵ)ノ セッショク テイリョウ ト ゲンバ ブンセキ
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Abstract
A sensitive and selective method for determination of Cr(VI) has been developed using chromium-catalyzed oxidation of o-phenylenediamine with hydrogen peroxide. Under an optimized condition, the absorbance at 430 nm and at a fixed reaction time of 10 min was proportional to the concentration of Cr(VI) up to 1 mg L−1. A detection limit (DL) was 1 μg L−1. On-site determinations were carried out using a laboratory-made palm-top size colorimeter with a red-green-blue light emitting diode. Measurement of the absorbance for blue light was used for the determination up to 1 mg L−1 with a DL of 1 μg L−1. A kinetic study derived an on-site reaction time of τ = τoexp[b(1/T–1/To)], where the standard reaction time τo = 10 min, b = 7.65×103, a standard reaction temperature To = 298 K. By this equation, τ giving an absorbance value at τo and To can be calculated for any on-site temperature (T) between 20 and 40°C. On-site analyses within an error of 6% were carried out without control of reaction temperature and with a laboratory-prepared calibration curve at τo and To. The proposed method was successfully applied to natural and standard river-water samples and an industrial waste-water sample.
Journal
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- BUNSEKI KAGAKU
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BUNSEKI KAGAKU 61 (2), 103-108, 2012
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390001204660642944
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- NII Article ID
- 10030135056
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- NII Book ID
- AN00222633
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- COI
- 1:CAS:528:DC%2BC38XktlSgsro%3D
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- NDL BIB ID
- 023516995
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- ISSN
- 05251931
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed