Simple and Rapid Device for Mercury Detection Based on The Formation of Mercury(II)-Dithizonate on Polytetrafluoroethylene (PTFE) Membrane

Abstract

A new analytical device for mercury detection has been developed by doping dithizone on to hydrophobic PTFE (polytetrafluoroethylene) membrane to form a blue dithizone membrane which instantaneously changed to orange color of mercury(II)-dithizonate complex, when this dithizone membrane was contacted to mercury(II) solution. The higher concentration of mercury showed the greater intensity of the orange colour mercury(II)-dithizonate complex. The design and chemicals were optimized to obtain the best performance for mercury measurement. This method is prospective as mercury test kit for simple, low cost, and rapid semi-quantitative method for mercury(II) determination from 1-10 mgL-1 suits for on-site mercury detection and has been applied to cosmetics with satisfactory results.

Green synthesis of silver nanoparticles using Coffea canephora fruit skin extract and its application for mercury detection in face cream samples

“…Mercury metal ions in the form of Hg 2+ are the most stable and widespread pollutants. Various methods have been developed to monitor mercury concentration in good consumer samples, including cold vapor atomic absorption spectrophotometry or CV-AAS [ 31 ], inductively coupled plasma mass spectrometry or ICP-MS [ 39 ], and UV–Vis spectrophotometric using ligand complexes such as dithizone [ 36 ] and rhodamine B [ 16 ]. However, these methods have several weaknesses, including high-cost equipment and maintenance, complex sample preparation, time-consuming analysis, and inefficient routine monitoring [ 11 ].…”