Droplet Microfluidic-Based In Situ Analyzer for Monitoring Free Nitrate in Soil.

ABSTRACT: Monitoring nutrients in the soil can provide valuable information for understanding their spatiotemporal variability and informing precise soil management. Here, we describe an autonomous in situ analyzer for the real-time monitoring of nitrate in soil. The analyzer can sample soil nitrate using either microdialysis or ultrafiltration probes placed within the soil and quantify soil nitrate using droplet microfluidics and colorimetric measurement. Compared with traditional manual sampling and lab analysis, the analyzer features low reagent consumption (96 μL per measurement), low maintenance requirement (monthly), and high measurement frequency (2 or 4 measurements per day), providing nondrifting lab-quality data with errors of less than 10% using a microdialysis probe and 2-3% for u

SUBMITTER: Lu B 

PROVIDER: S-EPMC10867830 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature