New Determination Methods of Halides and Cyanide Ions by Electrospray Ionization Mass Spectrometry Based on Ternary Complex Formation

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Abstract

Determination methods of halide ions (X− = F−, Cl−, Br− and I−) by electrospray ionization mass spectrometry (ESIMS) were developed, where negative ions of the ternary complexes of group-13 elements, nitrilotriacetic acid (NTA), and halides were measured. In particular, these halides were simultaneously determined by measuring [InX(nta)]−, and the limits of detection (LODs) were 1.1 μmol dm−3 for F−, 0.32 μmol dm−3 for Cl−, 3.8 nmol dm−3 for Br−, and 1.6 nmol dm−3 for I−, respectively. This approach was extended to the determination of CN−, where the ternary complex of CuII, CN− and 4-(2-pyridylazo)resorcinol (PAR), i.e., [63CuII(CN)(par)]− (m/z 302) was measured. The LOD for CN− was 20 nmol dm−3.

Journal

  • Analytical Sciences

    Analytical Sciences 27 (9), 953-, 2011

    The Japan Society for Analytical Chemistry

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