Development of a Highly Sensitive Extractive Spectrophotometric Method for the Determination of NickelII from Environmental Matrices Using 2-Acetylpyridine-4-methyl-3-thiosemicarbazoneReportar como inadecuado




Development of a Highly Sensitive Extractive Spectrophotometric Method for the Determination of NickelII from Environmental Matrices Using 2-Acetylpyridine-4-methyl-3-thiosemicarbazone - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

NickelII reacts with 2-acetylpyridine-4-methyl-3-thiosemicarbazone APMT and forms a yellow colored complex, which was extracted into n-hexanol from sodium acetate and acetic acid buffer at pH 6.0. The absorbance value of the NiII-APMT complex was measured at different intervals of time at 375 nm to ascertain the time stability of the complex. The extraction of the complex into the solvent was instantaneous and stable for more than 72 hrs. The system obeyed Beer’s law in the concentration range of 0.235 - 2.43 μg·ml–1 of nickelII, with an excellent linearity and a correlation coefficient of 0.999. The molar absorptivity and Sandell’s sensitivity of the extracted species were found to be 2.16 × 104 L mol–1 ·cm–1 and 0.003 μg·cm–2 at 375 nm, respectively. Hence a detailed study of the extraction of nickelII with APMT has been undertaken with a view to developing a rapid and sensitive extractive spectrophotometric method for the determination of nickelII when present alone or in the presence of diverse ions which are usually associated with nickelII in environmental matrices like soil and industrial effluents. Various standard alloy samples CM 247 LC, IN 718, BCS 233, 266, 253 and 251 have been tested for the determination of nickel for the purpose of validation of the present method. The results of the proposed method are comparable with those from atomic absorption spectrometry and were found to be in good agreement.

KEYWORDS

NickelII; Environmental Matrices; Extractive Spectrophotometry; 2-Acetylpyridine-4-methyl-3-thiosemicarbazone and Atomic Absorption Spectrometry

Cite this paper

D. Reddy, K. Reddy, B. Tegegne and V. Reddy -Development of a Highly Sensitive Extractive Spectrophotometric Method for the Determination of NickelII from Environmental Matrices Using 2-Acetylpyridine-4-methyl-3-thiosemicarbazone,- American Journal of Analytical Chemistry, Vol. 3 No. 11, 2012, pp. 719-726. doi: 10.4236-ajac.2012.311096.





Autor: Desam Nagarjuna Reddy, Kanumukkala Vasudeva Reddy, Berhanu Menasbo Tegegne, Vanka Krishna Reddy

Fuente: http://www.scirp.org/



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