Successive determinations of platinum(II) and selenium(IV) with 1,4-dibromo-2,3-diaminonaphthalene in aqueous micellar solutions

Tomoyuki Warashina, Hitoshi Hoshino, Takao Yotsuyanagi

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7 Citations (Scopus)

Abstract

Highly sensitive successive determinations for Pt II and Se IV ions have been developed based upon reactions with 1,4-dibromo-2,3-diaminonaphthalene (Br 2 DAN), which forms a near-infrared (NIR) absorbing complex (ε = 1.2 × 10 5 1 mol -1 cm -1 at 800 nm) and an emissive complex (ex. 386 nm, em. 604 nm) for Pt II and Se IV ions, respectively, in acidic aqueous micellar solutions. In the presence of a cationic surfactant, cetyltrimethylammonium chloride, the detection limits for Pt II and Se IV ions are 1.2 ng ml -1 (3σ) 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 Pt II complex. The influences of Cu II and Zn II ions at the normal human serum levels are readily tolerated, and interference from Fe I3II ion at 35 μmol 1 -1 is circumvented by the addition of 50 μmol 1 -1 of polyaminocarboxylates, such as EDTA.

Original languageEnglish
Pages (from-to)859-863
Number of pages5
Journalanalytical sciences
Volume17
Issue number7
DOIs
Publication statusPublished - 2001

ASJC Scopus subject areas

  • Analytical Chemistry

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