# A Smartphone-Enabled Imaging Device for Chromotropic Acid-Based Measurement of Nitrate in Soil Samples

> Research article (Sensors, 2023) · cited 10× · AI/ML

**Wikidata**: [openalex:W4386098544](https://www.wikidata.org/wiki/openalex:W4386098544)  
**Source**: https://4ort.xyz/entity/a-smartphone-enabled-imaging-device-for-chromotropic-acid-based-measurement-of-nitrate-in-soil-samples