Chemical Sensor for Determination of Mercury in Contaminated Water

Abstract

In this research, we constructed chemical sensor for determining mercury in contaminated water because we needed fast, simple, low-cost, and accurate determination of mercury in different environmental systems. The constructed membrane composed of (Poly Vinyl Chloride) PVC as a matrix material, 1,5-diphenylthiocarbazone (dithizone) as electro active compound, and di-n-butyl phthalate (DBPH) as a plasticizer. The optimum membrane composition 30% PVC, 65% DBPH, 5% dithizone exhibited the better Nernstian response. The results showed that probe is high stability along the pH range from (3.5 to 8). The electrode displays a linear log [Hg 2+ ] versus Electromotive Force (EMF) response over a wide concentration range of (5×10 −6 to 1×10 −2 M) with Nernstian slope of 29.7 ± 0.5 mV decade -1 and limit of detection 3×10 −6 M. The proposed sensor shows relatively high selectivity for mercury ion in different matrix solution, other ions had negligible interference effect on the reading.

A ditopic calix[4]pyrrole amide derivative: highlighting the importance of fundamental studies and the use of NaPh4B as additive in the design and applications of mercury(ii) ion selective electrodes

“…Optimal working conditions for the potentiometric response of the electrode in terms of its membrane composition and the pH of the aqueous solution were investigated together with the characteristics of this electrode regarding linear working range, detection limit, lifetime and interferences. The advantages of this new electrode relative to those based on ionophores (such as crown ethers derivatives, [21][22][23][24][25][26] calixarene derivatives, [27][28][29] cryptand 22, 30 tetra-aza macrocycles [31][32][33] as well as other compounds [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53] ) are discussed.…”

Lignosulfonate-Based Conducting Flexible Polymeric Membranes for Liquid Sensing Applications

“…Other metal-sensitive sensors based on different polymeric membrane ion-selective electrodes incorporating ionophores, sensitive to different cations, have been widely reported in the literature [ 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 ]. Most of these sensors exhibit a near-Nernstian or Nernstian response to the different cations studied.…”

Synthesis, Characterization and Analytical Applications of Novel Potentiometric Sensor Based on Chromium(III)Boratotungstophosphate

“…It was also observed that probability value (′p′ value) was greater than alpha (> 0.05) which provided the evidence that the proposed electrode can be suitably used to check the presence of Hg 2+ in the real samples. Comparability of proposed electrode with reported sensors selective for mercury ions: The working of proposed electrode was compared with the reported sensors selective for mercury [40][41][42][43][44] and found that electrode based on chromium(III) boratotungstophosphate was superior with respect to its properties (Table-11).…”