Determination of Trace Amounts of Nickel(II) with a-(2 -Benzimidazolyl)-a', a''-(N-5-nitro-2 -pyridyl hydrazone) toluene in the Presence of Triton X-100 by Fluorescence Method

Title
Determination of Trace Amounts of Nickel(II) with a-(2 -Benzimidazolyl)-a', a''-(N-5-nitro-2 -pyridyl hydrazone) toluene in the Presence of Triton X-100 by Fluorescence Method
Authors
Cha, K.W.
Keywords
SENSITIVE SPECTROFLUOROMETRIC DETERMINATION, NEUTRAL MICELLAR MEDIUM
Issue Date
2000-05
Publisher
KOREAN CHEMICAL SOC
Abstract
A method is described for the fluorimetric determination of nickel, based on the formation of Ni(II)-alpha-(2-Benzimidazolyl)-alpha' alpha "-(N-5-Nitro-2-Pyridylhydrazone)-toluene complex in the presence of a non-ionic surfactant. The complex has practically no fluorescence in the absence of surfactant, but the addition of Triton X-100 makes possible the fluorimetric determination of low concentrations of Ni(II) as it enhances the fluorescence intensity of the complex by up to about 5-fold. This method is very sensitive and selective for the direct determination of nickel ion. The optimum conditions are a Triton X-100 concentration of 2.0 mt (5.0%, v/v) and pH 9.0 +/- 0.2 (ammonium chloride-ammonia buffer). The fluorescence is measured at 337 nm of emission wavelength under 300 nm of excitation wavelength. The fluorescence intensity is a linear function of the concentration of Ni(II) in the range 5-70 ng/mL, and the detection limit is 2.0 ng/mL. The proposed method has been successfully applied to the determination of trace amounts of Ni(II) in food and human hair samples.
URI
http://dspace.inha.ac.kr/handle/10505/20285
ISSN
0253-2964
Appears in Collections:
College of Natural Science(자연과학대학) > Chemistry (화학) > Journal Papers, Reports(화학 논문, 보고서)
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