# Smartphone based optical biosensor for the detection of urea in saliva

> Research article (Sensors and Actuators B Chemical, 2018) · cited 167× · AI/ML

**Wikidata**: [openalex:W2801674256](https://www.wikidata.org/wiki/openalex:W2801674256)  
**Source**: https://4ort.xyz/entity/smartphone-based-optical-biosensor-for-the-detection-of-urea-in-saliva