Related Experiment Video
Updated: Feb 13, 2026

Gold Nanoparticle Synthesis
Published on: July 10, 2021
Gold nanoparticle-based method for detection of calcium carbide in artificially ripened mangoes (Magnifera indica)
Ankita Jagannath Lakade1, Kothandapani Sundar1,2, Prathapkumar Halady Shetty1
1a Department of Food Science and Technology , Pondicherry Central University , Puducherry , India.
Abstract:
A new approach was developed for a simple and easy colorimetric detection assay to detect the use of calcium carbide in artificial ripening of fruits. Residues of arsenic on the fruit surface were used as an indicator for this. Use of calcium carbide in artificial ripening has been banned in many countries including India. In the present study, we have used a gold nanoparticle (AuNP)-based colorimetric detection method for determination of artificial ripening of fruits. ICP-MS analysis showed the presence of higher amounts of arsenic on fruits ripened using calcium carbide. Lauryl sulphate (LS)-capped AuNP aggregates in the presence of arsenic, replacing the LS, resulting in a colour change from red to purple. Hence, the developed method can be used for easy and rapid detection of use of calcium carbide in artificial ripening of fruits.
More Related Videos
Related Concept Videos
Effects of EDTA on End-Point Detection Methods
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
Natural and Artificial Concepts
Precipitation Titration: Endpoint Detection Methods
In the Volhard method, a standard excess of AgNO3 is first added to the...
Skeleton and Calcium Homeostasis
Strong Acid and Base Solutions
Roles of Electrolytes: Calcium and Phosphate
The calcium concentration in blood plasma is primarily...

