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Ultraviolet absorbance titration for determing stability constants of humic substances with Cu(II) and Hg(II)
https://repo.qst.go.jp/records/45178
https://repo.qst.go.jp/records/45178946c688e-c69a-424b-bd60-ed0ecf712b1f
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-06-10 | |||||
| タイトル | ||||||
| タイトル | Ultraviolet absorbance titration for determing stability constants of humic substances with Cu(II) and Hg(II) | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
C, Bai Y
× C, Bai Y× Wu, Fengchang× Liu, Chongqiang× Y, Guo J× Fu, Pingqing× S, Xing B× Zheng, Jian× et.al× 鄭 建 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We describe an ultraviolet absorbance titration method that can be used to determine complexing capacities and conditional stability constants of humic substances with metal ions such as Cu(II) and Hg(II). Two fulvic acids and one humic acid were used for this study. UV absorbance of HSs gradually increased with the addition of Cu(II) or Hg(II) after blank correction, and these increases followed the theoretical 1:1 (ligand:metal ion) binding model. The results from the absorbance titration calculation for HSs with Cu(II) and Hg(II) compared well with those from fluorescence quenching titration. The titration of the model compound L-tyrosine with Cu(II) proved the validity of this method, and the K and CL were within 2.3 % and 7.4 % of the fluoresence quenching titration. The results suggest that the UV absorbance titration can be used to study the binding capacities of HSs and/or dissolved organic matter with trace metals. The advantages and disadvantages of the absorbance titration method were also discussed. | |||||
| 書誌情報 |
Analytica Chimica Acta 巻 616, 号 1, p. 115-121, 発行日 2008-05 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0003-2670 | |||||
