Semiconducting metal oxide-based
gas sensors have inadequate selectivity
as they are responsive toward a variety of gases. Here, we report
the implementation of gas sensing kinetic analysis of the sensor to
identify the tested volatile organic compounds (VOCs) (2-propanol,
formaldehyde, methanol, and toluene) precisely. A single chemiresistive
sensor was employed having tin oxide-based hollow spheres as the sensing
material, which were obtained by chemical synthesis. The gas sensing
measurements were conducted in a dynamic manner where the sensor displayed
excellent response with high sensitivity. Eley–Rideal model
was adopted to obtain the kinetic properties of the gas sensing phenomenon
through theoretical fitting of response transient curves and their
corresponding kinetic parameters. The calculated characteristic kinetic
properties were further examined to discriminate among different VOCs.
The approach of using gas sensing kinetic analysis for multiple gas
discrimination is an attractive solution to mitigate the problem of
cross-sensitivity for resistive gas sensors.
The focus of Indian agriculture so far has been on meeting the national demand, however it is going through a steady transformation phase to address the global requirement and is being driven by consumers and markets. According to APEDA Agriexchange portal, every year our country suffers more than 17000 Cr losses because consignments get rejected [I]. There is a growing concern for the food quality and scrutiny of the food supply chain [2] due to increased use of pesticides and its impact on health [3].As a result, awareness of the importance of safe food is rapidly increasing among the consumers worldwide. Global standards like Global GAP (Good Agriculture Practices) [4], Better Cotton Initiative, Table Responsible Soy) etc. have evolved with the collaborative efforts of growers, industry experts, researchers and retailers around the globe. These certifications contain standardized processes for producing fresh food resulting in good quality and environment sustainability. These mostly involve audit and documentation processes, in English, with Site Inspectors and Auditors visiting the field and recording their observations on paper. Hence the scalability is a challenge and the adoption is low. ICT can play an important role in bringing traceability, simplification and ensuring adaptation of the standard farming practices in India. IT tool has the capability of determining the physical location of the source of the product and also the sequence of events for traceability. The objective of this paper is to bring about a solution for Agriculture Process Standards Implementation that benefits holistically -quality, quantity of the produce and health and environmental needs. This paper brings about field experiences in implementation of GAP Certification in Amravati district (Maharashtra) for Orange Producer Group using mKRISHI-GAP system.
RTRS (Round
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