مهندسی نساجی گیلان:. گیل تکس

سایت تخصصی نساجی و پوشاک

مهندسی نساجی گیلان:. گیل تکس

سایت تخصصی نساجی و پوشاک

Measurement of the Silver Nano-particles Immobilized on the Cott


Measurement of the Silver Nano-particles Immobilized on the Cotton Fabric by Exhaustion Method
Mohammad Reza Nateghi, Mohammad Shateri Khalilabad,Mohammad Esmail Yazdanshenas
Abstract
In the present work, the capabilities of the anodic stripping voltammetry (ASV) and the UV-vis spectrophotometry for the determination of the silver nanoparticles immobilized on the cellulosic fibers were evaluated and compared to those of Ag+ determination using inductively coupled plasma atomic emission spectrometry. The absorption spectra of dithizone (diphenylthiocarbazone) in carbon tetra chloride before and after addition of the Ag+ were recorded. Absorption at 612 nm reduces as the amount of the silver ion added to the dithizone solution increases.  Calibration plot was established under the optimized conditions. A liner correlation was found between the concentration
of the Ag+ and the absorbance at 612 nm for the range of 1-19 mg L-1, with a regression equation of ∆A= 0.0591 C +
.0701 and correlation coefficient of 0.9981.
Determination of the Ag+ was also carried out by ASV method on the glassy carbon working electrode. A preconcentration potential of -500 mV was applied during 60 s followed by a rest period of 10 s. Stripping of the silver ion
by re-oxidation process can be observed at the potential range of -200 - 70 mV. A linear relation was found between the
concentration of the Ag+ and the peak current in the range of 1-16 mg L-1. The regression equation Ip = 2.484C + 0.034  and correlation coefficient of 0.9989 were resulted. Also, the Ag content of the cotton samples was determined by ICPOES technique and compared with those of obtained by two above mentioned methods. This study indicated that there is  a good agreement between the results obtained by these three methods.
Keywords: Dithizone, Voltammetry, Spectrophotometry, Silver, Cotton fabrics.


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