Overview

Scientists at the Birla Institute of Technology and Science (BITS) Pilani, Hyderabad, have developed a portable gadget that swiftly detects pesticide residues on fruits, vegetables, and water. This innovation eliminates the need for the traditional, time-consuming process of converting produce into juice for testing.

Affordable IoT-Enabled Pesticide Testing

The compact microfluidic device identifies organophosphorus (OP) pesticide residues through the water used to wash the produce. It ensures rapid, on-the-spot testing, making it especially valuable in resource-limited settings. The system accurately detects eight commonly used OP pesticides in India, including malathion, chlorpyrifos, and dimethoate, with detection thresholds far below the FAO’s CODEX standards.

Lead researcher KS Deepak explained that just 5 ml of washing water is enough for analysis, leaving the produce unharmed. The water is mixed with a reagent provided by the device, and a colour change indicates the type of pesticide residue detected. Additionally, a screen displays the residue’s concentration level.

This cost-effective, non-invasive solution promises to transform food safety monitoring. The device includes a microchip made of polydimethylsiloxane (PDMS) with spiral micromixers, housed in a 3D-printed shell. It leverages IoT technology for instant data transfer, enabling remote experts to monitor results in real time.

With detection limits well below international standards, the device offers reliable safety assessments. While conventional methods cost approximately ₹1,500 per test, this innovative solution reduces the cost to just ₹10 per unit. Researchers are commercializing the product through their startup, Sensome Innovation.

Source: The Times of India