Preparation and Charactreization Selective Electrode for Determination of CopperIon(II)

Salwa Fares Rassi

doi:10.5599/jese.236

Abstract

<span>Achemically modified carbon paste electrode with diphenyl carbazide the potentiometric determination of Cu(II) is demonstrated. The electrode exhibits linear response to Cu(II) over a wide concentration range (9.2×10−7-5.0×10−1) with Nernstian slope of 30±0.15 mV per decade. It has a response time of about 40 s and can be used for a period of two months with good reproducibility. The detection limit of this electrode was 7.0×10−7 M. The proposed electrode shows a very good selectivity for Cu(II) over a wide variety of metal ions. This chemically modified carbon paste electrode was successfully used for the determination of Cu(II) in various water samples solution and pharmaceutical formulation</span>

Highlights

IntroductionA few years ago chemically modified carbon paste electrodes (CMCPEs) were applied to analytical determinations
A few years ago chemically modified carbon paste electrodes (CMCPEs) were applied to analytical determinations.Copper is an essential element and is toxic
These results show that by increasing the percentages of modifier up to 12.5 % the slopes decrease sharply, but within 15-20 % the slopes are becoming more Nernstian and slopes of the electrode are only slightly changed

Summary

Introduction

A few years ago chemically modified carbon paste electrodes (CMCPEs) were applied to analytical determinations. Copper is an essential element and is toxic. Copper is one of the important and essential nutrients for human health as well as the growth of animals and plants [1,2,3,4,5,6,7]. Copper is required for normal metabolic processes. Copper combines with certain proteins to produce enzymes that act as catalysts to help a number of body functions. Copper helps provide energy required by biochemical reactions. Copper is an essential micronutrient and is required by the body in very small amounts, excess copper in the human body can cause stomach and intestinal distress such as nausea, vomiting, diarrhea, and stomach cramps. The lowest level at which these adverse doi:10.5599/jese.236

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