Successive determinations of platinum(II) and selenium(IV) with 1,4-dibromo-2,3-diaminonaphthalene in aqueous micellar solutions.
Highly sensitive successive determinations for PtII and SeIV ions have been developed based upon reactions with 1,4-dibromo-2,3-diaminonaphthalene (Br2DAN), which forms a near-infrared (NIR) absorbing complex (epsilon = 1.2 x 10(5) l mol-1 cm-1 at 800 nm) and an emissive complex (ex. 386 nm, em. 604 nm) for PtII and SeIV ions, respectively, in acidic aqueous micellar solutions. In the presence of a cationic surfactant, cetyltrimethylammonium chloride, the detection limits for PtII and SeIV ions are 1.2 ng ml-1 (3 sigma) and 0.98 ng ml-1 (S/N = 3), respectively. Hydrobromic acid plays a key role to enhance the color development of the NIR-absorbing PtII complex. The influences of CuII and ZnII ions at the normal human serum levels are readily tolerated, and interference from FeIII ion at 35 mumol l-1 is circumvented by the addition of 50 mumol l-1 of polyaminocarboxylates, such as EDTA.
Warashina
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Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, Aobayama, Sendai 980-8579, Japan. wara@analchem.che.tohoku.ac.jp
Hoshino
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Yotsuyanagi
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D015081:2-Naphthylamine / Q000031:analogs & derivatives / Q000032:analysis* / Q000737:chemistry* / Q000494:pharmacology*; D002945:Cisplatin / Q000494:pharmacology; D003300:Copper / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D006801:Humans; D018054:Hydrobromic Acid / Q000494:pharmacology; D007501:Iron / Q000737:chemistry / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008823:Micelles; D008956:Models, Chemical; D010984:Platinum / Q000032:analysis* / Q000097:blood / Q000378:metabolism; D012643:Selenium / Q000032:analysis* / Q000494:pharmacology; D013053:Spectrophotometry; D014867:Water / Q000737:chemistry*; D015032:Zinc / Q000494:pharmacology
C442462:2,3-diamino-1,4-dibromonaphthalene; D008823:Micelles; D014867:Water; D018054:Hydrobromic Acid; D010984:Platinum; D003300:Copper; D015081:2-Naphthylamine; D007501:Iron; D012643:Selenium; D015032:Zinc; D002945:Cisplatin