pH Measurement of Soil and Biochar
An Application Note on the pH Measurement of Soil and Biochar Using InLab DES Digital Sensors
Conventional pH sensors face a range of challenges when measuring pH in soil and biochar. Suspended particles in the sample slurry can clog the sensor, dry out the glass membrane, or scratch its surface, leading to inaccurate readings and sensor damage. This application note provides a comprehensive guide for accurate pH measurement of soil and biochar using a specialized sensor like InLab™ Expert Pro-DES™, while adhering to ASTM and TMECC guidelines.
The pH value of soil can determine a wide range of characteristics, and accurate pH measurements are used to verify the potential availability of essential nutrients as well as toxicity levels in soil and biochar. Biochar is a form of charcoal that remains after the pyrolysis of biomass which can improve soil nutrient availability, aeration, and water filtration. When the pH of soil or biochar is too low or too high, the availability of essential nutrients to plants is reduced, which can result in impaired plant growth and lower crop productivity. Microbial activity is also seen to decrease with high and low pH, which can lead to a build-up of toxic compounds.
This application note recommends METTLER TOLEDO advanced solutions, including the InLab Expert Pro-DES digital pH sensor and the NineFocus™ pH meter for accurately measuring the pH of soil and biochar. The application note also provides a detailed guide, outlining setup, calibration, maintenance, and best practices to enhance measurement accuracy and prolong the lifespan of sensors when measuring slurry-like solutions.
To learn more about achieving precise pH measurement of soil and biochar, download the application note now.
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