Why is it in the news?
- Researchers have developed a new, cost-effective formalin sensor designed to detect the presence of formaldehyde in adulterated fish.
· Formaldehyde is a colourless, pungent gas used in various industrial processes, including as a preservative in some foods, notably in fish in developing countries.
· Banned in many countries due to its carcinogenic nature.
Present Techniques for Detection
- Commercial formalin sensors for fish traditionally rely on either electrochemical or colorimetric principles.
- Electrochemical sensors are effective but often expensive, while colorimetric sensors are more budget-friendly.
- Both methods are invasive and face challenges in achieving precise and selective detection, especially at low levels.
Characteristics of the New Non-Invasive Formaldehyde Sensor
- Developed using tin oxide-reduced graphene oxide composite (rGO-SnO2).
- Reduced graphene oxide (rGO) is known for detecting toxic gases, while tin oxide (SnO2) is recognized for its ability to detect formaldehyde.
- The sensor employs a non-invasive technique for detecting formalin in adulterated fish.
- Exhibits prolonged stability, ensuring consistent performance.
- Has a low-level detection limit, enabling the identification of formaldehyde even at low concentrations.
- The development is relatively cost-effective, making it a practical solution for widespread use.
- Regarded as a breakthrough in the field of food adulteration, addressing issues associated with traditional detection methods.