Sensors play a major role in agricultural and food applications. Soil analysis such as soil salinity and selective ion detection benefit greatly from electrochemical sensor development. Other applications include taste and odor detection, pH and nutrient content, neurotoxin detection for insecticides (e.g. organophosphate neurotoxins). Biosensors assist in the detection of chemical contaminants and pathogens in food and often serve as “electronic tongues”, detecting molecules such as glucose and catechol. Modifications such as enzyme grafting on the working electrode can allow for increased sensitivity and higher selectivity.
Metrohm offers an array of electrode materials to provide a platform for, or modifications to, screen printed and interdigitated electrodes for molecule sensing at a microvolume scale.
Metrohm DropSens offers an array of screen printed and interdigitated electrodes. Not only can you custom design a new electrode, but modifications can also be made to existing electrodes. See below for some examples of common electrodes and modifications for agricultural and food applications.
|Common Electrodes||Common Modifications|
|110GPH: Graphene modified screen-printed electrode
250AT: Screen-printed gold electrode
220BT: Screen-printed gold electrod
110CNT-GNP: Multi-Walled Carbon Nanotubes-Gold Nanoparticles modified screen-printed electrode
110SWCNT: Single-Walled Carbon Nanotubes modified screen-printed electrode
“Amperometric fructose sensor based on ferrocyanide modified screen-printed carbon electrode”
“Development of a cytochrome c-based screen-printed biosensor for the determination of the antioxidant capacity of orange juices”
“Beer discrimination using a portable electronic tongue based on screen-printed electrodes.”
“Enzymatic Sensor Using Mediator-Screen-Printed Carbon Electrodes”
“Preparation, characterization of Fe3O4 at TiO2 magnetic nanoparticles and their application for immunoassay of biomarker of exposure to…”
“The advantages of disposable screen-printed biosensors in a bioelectronic tongue for the analysis of grapes”