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Spectrophotometric determination of mercury(II) by solvent extraction with 2, 2'-bipyridyliron(II) chelate
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- YAMAMOTO Yuroku
- Department of Chemistry, Faculty of Science, Hiroshima University
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- KIKUCHI Sumiyoshi
- 新居浜工業高等専門学校工業化学科
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- KUMAMARU Takahiro
- Department of Chemistry, Faculty of Science, Hiroshima University
Bibliographic Information
- Other Title
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- 2,2'-ビピリジル-鉄(II)キレートによる水銀(II)の溶媒抽出吸光光度定量法
- 2 , 2 -ビピリジル-テツ II キレート ニ ヨル スイギン II ノ ヨウバイ チュウシュツ キュウコウ コウド テイリョウホウ
- 金属キレート陽イオンによる陰イオンの溶媒抽出吸光光度定量法(第21報)
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Description
A spectrophotometric method for the determination of mercury(II), based on a solvent extraction of the associated ion pairs formed between 2, 2'-bipyridyliron(II) chelate cations and bromo-mercury(II) complex anions, is described.<BR>The best extractant is 1, 2-dichloroethane, whereas other organic solvents are useless in this system. The absorbance maximum of 2, 2'-bipyridyl-iron (II) chelate in the organic phase is at 526 mμ.<BR>The recommended procedure for the calibration curve is as follows.<BR>Five milliliters of potassium bromide (1 M ), varying amounts of standard mercury(II) solution (25 μg Hg2+ /ml, 010 ml), 1 ml of acetate buffer solution (1 M, pH 4.5) and 5 ml of 2, 2'-bipyridyl-iron(II) solution (5 × 10-3 M) are mixed. This solution is diluted to 25 ml with distilled water, and shaken for 3 min. with 10.0 ml of 1, 2-dichloroethane. The absorbance of the organic phase is measured at 526 mμ against the solvent.<BR>The percentage of the extraction is determined to be 82% (19°C) by radiochemical technique using Hg197. Beer's law is obeyed over the range of 110 μg/ml of mercury(II).<BR>Several features of the proposed method are as follows: A good extraction is obtained in the wide range of pH (210), the reagent employed is readily available in pure form, and the solution remains stable over a long period of storage. The method is convenient, accurate and highly selective for the determination of a small amount of mercury(II).
Journal
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- BUNSEKI KAGAKU
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BUNSEKI KAGAKU 16 (9), 931-936, 1967
The Japan Society for Analytical Chemistry
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Keywords
Details 詳細情報について
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- CRID
- 1390001204354059264
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- NII Article ID
- 130000944679
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- NII Book ID
- AN00222633
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- COI
- 1:CAS:528:DyaF1cXjsFGktg%3D%3D
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- NDL BIB ID
- 8442778
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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 Search
- Crossref
- CiNii Articles
- OpenAIRE
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- Abstract License Flag
- Disallowed