@article{Liu2025, 
author = {Jun Liu and Haotian Cai and Jie Pi and Liye Zhao},
title = {Development of the portable device for the determination of nitrate-nitrogen contents in soil},
year = {2025},
journal = {International Journal of Agricultural and Biological Engineering},
volume = {18},
number = {4},
pages = {216-228},
keywords = {Nitrate-nitrogen, soil, electrochemical sensor, detection},
url = {https://www.sciopen.com/article/10.25165/j.ijabe.20251805.8820},
doi = {10.25165/j.ijabe.20251805.8820},
abstract = {Soil nitrate-nitrogen is a crucial source of plant nutrition, making the rapid, accurate, and cost-effective determination of its content highly significant for agricultural production and environmental protection. To address the limitations of traditional methods for soil nitrate-nitrogen determination, particularly the time-consuming and lab-based sample pretreatment and analysis procedures hindering on-site applications, we developed a portable soil nitrate-nitrogen determination device based on screen-printed electrodes modified with cadmium sulfide nanorods as the core components. This device incorporates mainstream embedded system technology and employs a peak-finding algorithm utilizing low-pass filtering and second-order derivatives to automatically analyze electrochemical data, enabling swift measurement of soil nitrate-nitrogen content. Performance and application tests demonstrated that this device exhibits several key features: a detection range of 0.1-3.0 mmol/L, a low detection limit of 0.03 mmol/L, repeatability error below 11.7%, and measurement error below 10% compared to UV spectrophotometry. The device is characterized by its rapidity, simplicity, affordability, efficiency, and adaptability, enabling swift and user-friendly on-site determination of nitrate-nitrogen content in various types and sources of soil samples, offering a practical alternative to traditional lab-based analysis.}
}