Adsorptive stripping voltammetric determination of hydroquinone using an electrochemically pretreated glassy carbon electrode. | [Pakistan Journal of Analytical & Environmental Chemistry • 2008]

Author(s):

1. Abdul-Niaz: National Center of Excellence in Analytical Chemistry University of Sindh, Jamshoro, Sindh, Pakistan

2. Sarfraz Ahmed Mahesar: National Center of Excellence in Analytical Chemistry University of Sindh, Jamshoro, Sindh, Pakistan

3. Abdul-Rauf: National Center of Excellence in Analytical Chemistry University of Sindh, Jamshoro, Sindh, Pakistan

4. Afzal Shah: Department of Chemistry, Kohat University of Science and Technology, Kohat, NWFP, Pakistan

Abstract:

A simple and efficient adsorptive voltammetric (AdSV) method was developed for the determination of hydroquinone at an electrochemically pretreated glassy carbon (GC) electrode in waste water. Various parameters such as solvent system, accumulation potential, accumulation time and scan rate were optimized. The electrochemically pretreated GC electrode showed good response towards hydroquinone determination by using AdSV. Under the optimized conditions the peak current showed good linear relationship with the hydroquinone concentration in the range of 0.5-4.0mg L-1 and 5-30mg L-1.The 60/40 methanol/water composition was found to be the best solvent system and 0.05mol L-1 H2S04 was found as useful supporting electrolyte concentration. The accumulation time was 60 s and the detection; limit was 50µg L-1.The developed method was successfully applied for the determination of hydroquinone in polymeric industrial discharge samples waste photographic developer solution and cream sample without any significant effect of surface fouling.

Page(s): 110-117

DOI: DOI not available

Published: Journal: Pakistan Journal of Analytical & Environmental Chemistry, Volume: 9, Issue: 2, Year: 2008

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