2003 Fiscal Year Final Research Report Summary
Indirect spectrophotometric determination of arsenic(III) based on solid-phase extraction
| Project/Area Number |
13640596
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
分離・精製・検出法
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| Research Institution | Hirosaki University |
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Principal Investigator |
OHZEKI Kunio Hirosaki Univ., Faculty of Science and Technology, Professor, 理工学部, 教授 (30001845)
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| Project Period (FY) |
2001 – 2003
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| Keywords | arsenic(III) / arsenic(III,V) / arsenic(III)-APDC complex / copper(II)-APDC complex / finely divided ion-exchange resin / resin-phase extraction / resin-phase spectrophotometry |
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| Research Abstract |
A new method for the indirect spectrophotometic determination of arsenic was developed. This method is based on the extraction of arsenic(III) from a solution of pH 1.5 on a finely divided anion-exchange resin as a complex with ammonium pyrrolidinedithiocarbamate(APDC), separation of the resin fixing the As(III)-APDC complex from the bulk solution on a membrane filter, re-dispersion of the resin in a solution containing copper(II) and conversion a coloreless As(III)-APDC complex to a yellow Cu(II)-APDC complex, collection of the rsin on a membrane filter and measurement of the absorbance of the resulting Cu(II)-APDC complex in the resin phase by a spectrophotometer or a densitometer. The effects of interfering ions were successfully suppressed with the combined use of diethyldithiocarbamate(DDTC) and EDTA. The method was applied to a standard river water sample. Good results were obtained for the detemination of arsenic(III,V) at the ppb level in 40ml of the sample.
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Research Products
(2 results)
