Abstract
Synthetic dyes are commonly used in food products like soft drinks, vegetable sauces, jellies, etc. Most artificial dyes can cause cancer, therefore it is very important to develop sensors to detect them in food samples. Voltammetric methods with carbon paste electrodes (CPEs) are promising for this purpose. However, modification of CPEs is necessary to detect the commercial dyes in food samples in the presence of interferents. In the current review, we have discussed the different previous research in which detection of dyes is performed in real samples with good detection limits. The current review will be helpful for readers who are interested in developing low-cost electrodes for the effective determination of dyes in commercial products like soft drinks and vegetable sauces.
Highlights
Dyes play an integral part in the present world
Textile industry: It has been observed that 7 × 105 tons of synthetic dyes are produced every year around the globe, out of which about 2 × 105 tons are lost after various processing processes as waste effluent into water bodies
It is concluded that the various types of dyes used in the food, cosmetic, plastic, textile, and pharmaceutical industries for imparting colors represent a large group of organic compounds that have an undesirable effect on the environment
Summary
Dyes play an integral part in the present world. They are responsible for imparting colors due to chromophoric (azo, azoxy, nitro, carbonyl, thiocarbonyl) and auxochromic groups. They are different from pigments as the former are organic compounds and become attached chemically to the substrate while the latter do not form any chemical bonds and can be organic or inorganic compounds [1,2]
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