| Project/Area Number |
08640763
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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 INSTITUTION,DEPARTMENT,TITLE : HIROSAKI UNIVERSITY, DEPARTMENT OF MATERIALS SCIENCE AND TECHNOLOGY,PROFESSOR, 理工学部, 教授 (30001845)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | qraphite-furnace AAS / finely divided ion-exchange resin / resin suspension / APDC / cadmium / lead / tap water / イオン交換樹脂 / ピロリジンジチオカルバミン酸錯体 / 固相抽出 / 鉛イオン / カドミウムイオン / イオン交換樹脂懸濁液 / 痕跡元素 / 海水 |
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| Research Abstract |
Graphite-furnace atomic absorption spectrometry is one of the most widely used techniques for the determination of trace elements in water. However, its sensitivity for cadmium and lead is not sufficient for a direct determination of these elements in drinking water. So far, many techniques have been used for the enrichment of trace elements in water samples. ^1 One of the most important conditions of the enrichment techniques is simple connection to the subsequent determination techniques.
The aim of this work was to develop a simple preconcentration method for the determination of cadmium and lead in tap water with the combined use of a finely divided ion-exchange resin and ammonium pyrrolidinedithiocarbamate (APDC). Since the ion-exchange resin particles have both hydrophilic and hydrophobic properties, they can act as a hydrophilic organic solid in the bulk solution, and can extract species with hydrophobic pyoperties. Cadmium-and lead-APDC complexes were extracted simultaneously on the resin at pH 6. The resin particles holding the cadmium- and lead-APDC complexes were separated by filtration and dispersed in 1.0 ml of 0.1 mol 1<@D1-1@>D1 hydrochloric acid containing 100 mug of palladium (II). The resulting suspension was introduced directly into the graphite furnace by an automatic sampler. The detection limits of cadmium and lead in a 150-ml sample aliquot were 0.17 and 5.7 ng 1<@D1-1@>D1、respectively, based on three times the standard deviation of blank values. The proposed method was applied to the determination of cadmium and lead in the tap water supplied to our laboratory during the period from 9th to 18th September, 1997. The concentration of the metal ions for 10 days were 6.52(]SY.+-。[)0.75 ng 1<@D1-1@>D1 for cadmium and 136(]SY.+-。[)12 ng 1<@D1-1@>D1 for lead, respectively.<@D12@>D1
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