Biao-Ming Zhang

Guangxi Normal University, Ling-ch’uan, Guangxi Zhuangzu Zizhiqu, China

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Publications (3)3.79 Total impact

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    ABSTRACT: S2- and Ag+ form stable Ag2S nanoparticles in the presence of sodium dodecyl sulphate (SDS). It exhibits a strong resonance scattering peak at 470 nm and a strong fluorescence peak at 470 nm when excitation wavelength is at 200 nm. The effects of TAA and Ag+ concentration on the fluorescence intensities are consistent with those on the resonance scattering signals. The resonance scattering and fluorescence intensities all increase with Ag+ concentration in the range of 0-8.0 x 10(-5) mol x L(-1). The results verified that there is a correlation between the fluorescence and resonance scattering. The fluorescence is the interface fluorescence of Ag2S nanoparticles in liquid phase.
    Guang pu xue yu guang pu fen xi = Guang pu 08/2005; 25(7):1092-4. · 0.29 Impact Factor
  • Zhi-Liang Jiang, Biao-Ming Zhang, Ai-Hui Liang
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    ABSTRACT: A new simple, selective and sensitive method for the determination of trace chlorine dioxide in water has been developed, based on the oxidation by chlorine dioxide to reduction the fluorescence of rhodamine dyes in ammonia-ammonium chloride buffer solution. Four rhodamine dyes systems such as rhodamine S, rhodamine G, rhodamine B and butyl-rhodamine B were tested. The rhodamine S system is the best, with a linear range of 0.0060-0.450mugmL(-1) and a detection limit of 0.0030mugmL(-1) ClO(2). It was applied to the determination of chlorine dioxide in synthetic samples and real samples, with satisfactory results. This method has good selectivity, especially, other chlorine species such as chlorine, hypochlorite, chlorite and chlorate do not interfere the determination. The mechanism of fluorescence reduction was also considered.
    Talanta 05/2005; 66(3):783-8. · 3.50 Impact Factor
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    ABSTRACT: Under the conditions of 0.04molL−1 HCl–8.0 × 10−4molL−1 KI, there is a fluorescence peak at 540nm and a synchronous fluorescence peak at 540nm for rhodamine 6G (RhG). When there is IO3−, it reacts with exceed I− to form I3−. And I3− and RhG combine into ion association particles. The particles exhibit three resonance scattering peaks at 320, 400 and 595nm. And there is fluorescence quenching at 540nm. Iodine concentration is proportional to the intensity of the resonance scattering intensity at 400nm in the range of 1.0–20 × 10−7molL−1. And a new resonance scattering spectral (RSS) method has been described for the determination of IO3− in salt samples. The spectral results have been verified that the formation of (RhG-I3)n association particles and solid–liquid interfaces are the main factor that cause the fluorescence quenching and resonance scattering effects.
    Analytica Chimica Acta - ANAL CHIM ACTA. 01/2005; 530(1):131-134.