Abstract
The effectiveness of a colorimetric sensor is highly influential by the morphology characteristics of a membrane platform that affect the color change responses.
Highlights
Mercury and its derivatives are toxic metals that are highly soluble in water, contributing towards the contamination of ecosystems
A potentiometric sensor is an example of an electrochemical sensor, which relies on the measurement of the electrical potential difference between two electrodes and converts this into a measurable signal
Our previous work focused on the conceptual study of a dithizone-colorimetric sensor and its binding mechanism with a cellulose acetate (CA) membrane, which was used as the immobilization and detection platform.[35]
Summary
Mercury and its derivatives are toxic metals that are highly soluble in water, contributing towards the contamination of ecosystems. Our previous work focused on the conceptual study of a dithizone-colorimetric sensor and its binding mechanism with a cellulose acetate (CA) membrane, which was used as the immobilization and detection platform.[35] Various metal ions including Hg2+, Cu2+ and Zn2+ were tested. The most frequently used inorganic substrates, such as glass and silica gel, are dimensionally stable (resistant to swelling) These inorganic substrates have the disadvantage of limited surface area and porosity.[36] On the other hand, organic polymer substrates, such as polyvinylidene di uoride (PVDF)[37,38] and cellulose derivatives,[39] are commonly used in colorimetric sensors because they offer high mechanical strength, and good thermal and chemical stability. The sensitivity of the sensor was determined by the naked-eye detection of Hg2+ at different concentrations in aqueous media and by quantitatively analyzing the membrane dot color intensity using color de nition data of RGB triplet color space
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