Establishment of the light-absorption ratio variation approach and application to determination of Co(II) in the ng ml−1 level and novel characterization of Co(II) and Zn(II) complexes with 1,5-di(2-hydroxy-5-sulfophenyl)-3-cyanoformazan

The light-absorption ratio variation approach (LARVA) has been established and applied to the determination of Co on the ng ml−1 level with 1, 5-di(2-hydroxy-5-sulfophenyl)-3-cyanoformazan (DSPCF) at pH 9.33. Competitive replacement complexation (CRC) among DSPCF, Zn(II) and Co(II) as described was used to improve the analytical selectivity. The determination of the complex formation constants was also improved. Results have shown that ΔAr−1 (where ΔAr is the light-absorption ratio variation) is linear in the range of Co(II) between 10 and 200 ng ml−1. The limit of detection (3δ) of Co(II) is only 3.7 ng ml−1. The combination of CRC and LARVA has been applied to the analysis of water quality with satisfactory results.

[1]  Jianfu Zhao,et al.  Investigation of biomacromolecular assembly: replacement occurring on proteins , 2003 .

[2]  K. Mutaftchiev,et al.  Determination of manganese (II) in some medicinal plants and their decoctions by a kinetic spectrophotometric method. , 2003, Phytochemical analysis : PCA.

[3]  Jianfu Zhao,et al.  Investigation of the reaction of magnesium with p-nitro-o-carboxylazochromotropic acid and the determination of magnesium in plants and in water. , 2003, Phytochemical analysis : PCA.

[4]  Jianfu Zhao,et al.  Stability constants of cobalt(II) and copper(II) complexes with 3-[(o-carboxy-p-nitrobenzene)azo]chromotropic acid and selective determination of copper(II) by competition coordination , 2003 .

[5]  Hongwen Gao,et al.  Substitution Coordination Approach for Selective Determination of Complex: Pontachrome Violet SW/Fe(III)/Cu(II) System , 2002 .

[6]  M. Kazemipour,et al.  A new second-derivative spectrophotometric method for the determination of permethrin in shampoo. , 2002, Journal of pharmaceutical and biomedical analysis.

[7]  Yang Guangyu,et al.  Spectrophotometric determination of silver with 2-(2-quinolylazo)-5-diethylaminoaniline. , 2002, Talanta.

[8]  Hongwen Gao,et al.  langmuir aggregation of alkali blue 6b in proteins: Study and application , 2002 .

[9]  H. Abdollahi,et al.  Simultaneous determination of Fe(II) and Fe(III) by kinetic spectrophotometric H-point standard addition method. , 2002, Talanta.

[10]  C. Garnero,et al.  Second derivative spectrophotometric determination of trimethoprime and sulfamethoxazole in the presence of hydroxypropyl-β-cyclodextrin (HP-β-CD) , 2002 .

[11]  Jun Jiang,et al.  Langmuir Aggregation of Chromophore in Biomacromolecule and its Application: Interaction of Picramine CA (PCA) with Proteins , 2002 .

[12]  T. Umemura,et al.  Sensitive measurement of methylene blue active substances by attenuated total reflection spectrometry with a trimethylsilane-modified glass slab optical waveguide. , 2002, The Analyst.

[13]  Jianfu Zhao,et al.  Langmuir Aggregation of Eosin-Y in Protein and its Application , 2002 .

[14]  G. C. Pandey,et al.  A novel approach for the determination of the physicomechanical properties of polymers by vibrational spectroscopy: The tensile strength of polybutadiene rubber , 2001 .

[15]  M. Tao,et al.  Determination of Trace Amounts of Cadmium with p-Acetyl-Benzenediazoaminoazobenzene by Primary–Secondary Wavelength Spectrophotometry , 2001 .

[16]  L. Zaijun,et al.  Spectrophotometric method for determination of germanium in foods with new color reagent trimethoxylphenylfluorone , 2001 .

[17]  Baoxin Li,et al.  Chemiluminescent flow-through sensor for hydrogen peroxide based on sol–gel immobilized hemoglobin as catalyst , 2001 .

[18]  B. Reis,et al.  A multicommutation-based flow system for multi-element analysis in pharmaceutical preparations. , 2001, Talanta.

[19]  W. Thiemann,et al.  In situ fluorescent labeling of highly volatile methylamine with 8-(4,6-dichloro-1,3,5-triazinoxy)quinoline , 2001 .

[20]  Y. Liu,et al.  1,9-Dihydro-3-phenyl-4H-pyrazolo[3,4-b]quinolin-4-one, a novel fluorescent probe for extreme pH measurement , 2001 .

[21]  H. Gao.  Multiwavelength spectral correction for the simultaneous determination of Cu(II), Fe(II), and Zn(II) with 1-(5-bromo-2-pyridylazo)-2-naphthol-6-sulfonic acid. , 2001, Journal of AOAC International.

[22]  J. Jiang,et al.  Study of the spectrophotometric analysis of protein solution with p-iodochlorophosphonazo as adsorbate by the microphase adsorption-spectral correction technique. , 2001, The Analyst.

[23]  H. Gao.  Investigation of properties of copper, ferrous complexes with 1-(5-bromo-2-pyridylazo)-2-naphthol-6-sulphonic acid and application of substitution reaction in metallic complex to selective determination of trace amounts of metal. , 2000, Talanta.

[24]  V. Ulvi.  Spectrophotometric studies on the photostability of some thiazide diuretics in ethanolic solution. , 1998, Journal of pharmaceutical and biomedical analysis.

[25]  J. A. Howell,et al.  Ultraviolet and Absorption Light Spectrometry , 1998 .

[26]  K. Kitamura,et al.  Second-derivative spectrophotometric study on the interactions of chlorpromazine and triflupromazine with bovine serum albumin , 1997 .

[27]  C. Ojeda,et al.  Recent developments in derivative ultraviolet/visible absorption spectrophotometery. , 1995, Talanta.

[28]  L. Nørgaard,et al.  Generalized standard addition in flow-injection analysis with UV-visible photodiode array detection , 1995 .

[29]  R. Brereton.  Tutorial review. Deconvolution of mixtures by factor analysis , 1995 .

[30]  T. Nedeltcheva,et al.  Method for selection of optimum wavelengths for multicomponent spectrophotometric determinations , 1995 .

[31]  G. Dumont,et al.  Generalized Fourier Smoothing of Flow Injection Analysis Data , 1994 .

[32]  D. Pérez-Bendito,et al.  Improved automatic kinetic method for the determination of various corticosteroids. , 1994, Journal of pharmaceutical sciences.

[33]  S. Howdle,et al.  Acoustic and photoacoustic measurements in supercritical fluids; a new approach to determining the critical point of mixtures , 1994 .

[34]  P. Dasgupta,et al.  Dual-wavelength photometry with light emitting diodes. Compensation of refractive index and turbidity effects in flow-injection analysis , 1994 .

[35]  Lars Nørgaard,et al.  RANK ANNIHILATION FACTOR ANALYSIS APPLIED TO FLOW INJECTION ANALYSIS WITH PHOTODIODE-ARRAY DETECTION , 1994 .

[36]  Peng-fei Zhang,et al.  Determination of antimony in waste water with Chromazurol S by beta-correction spectrophotometry , 1994 .

[37]  Y. Hirata,et al.  Temperature and pressure controlled UV detector for capillary supercritical fluid chromatography , 1992 .

[38]  M. Bos,et al.  Wavelet transform for the evaluation of peak intensities in flow-injection analysis , 1992 .

[39]  P. Campíns-Falcó,et al.  Development of the H-point standard-additions method for ultraviolet-visible spectroscopic kinetic analysis of two-component systems , 1991 .

[40]  Dolores Pérez-Bendito,et al.  Performance of the Kalman filter algorithm in differential reaction-rate methods , 1991 .

[41]  F. Salinas,et al.  A new spectrophotometric method for quantitative multicomponent analysis resolution of mixtures of salicylic and salicyluric acids. , 1990, Talanta.

[42]  L. G. Hargis,et al.  Ultraviolet and light absorption spectrometry. , 1978, Analytical chemistry.

[43]  D. Pérez-Bendito.  Approaches to differential reaction-rate methods. Plenary lecture , 1990 .

[44]  Avraham Lorber,et al.  Validation of hypothesis on a data matrix by target factor analysis , 1984 .

[45]  Bunzo Tamura.  Absorbance ratio of pH indicators and its application to volumetric analysis , 1967 .

[46]  M. Kies,et al.  Note on spectrophotometric determination of proteins in dilute solutions , 1960 .