کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4909509 | 1362624 | 2016 | 9 صفحه PDF | دانلود رایگان |
An evaluation of analytical reagent, 2,6-diacetylpyridine-bis-4-phenyl-3-thiosemicarbazone (2,6-DAPBPTSC) for traces of Zn(II) in foods and environmental samples by the development of a simple, sensitive and selective extractive spectrophotometric method was undertaken. It gave a 1:1(M:L) Zn(II)-2,6-DAPBPTSC yellowish orange colored complex at pH 4.5, was easily extractable into n-butanol and has shown maximum absorbance at 490 nm. It obeys Beer's law in the range of 1.06-13.6 μg mLâ1 of Zn(II). The molar absorptivity, Sandell's sensitivity and detection limit were found to be 0.471 Ã 104 L molâ1 cmâ1, 0.0138 μg cmâ2 and 0.0081 μg mLâ1, respectively. The correlation co-efficient of the complex (r = 0.985) indicates good linearity between two variables such as absorbance of complex and amount of zinc. The proposed procedure was applied to traces of Zn(II) in foods and environmental samples. Results were compared with those obtained using an AAS and statical validation of the method was tested in terms of Student 'T' test and variance 'F' test, which indicate the significance of the present method.
Journal: Journal of Saudi Chemical Society - Volume 20, Supplement 1, September 2016, Pages S271-S279