A gold nanoparticle (AuNP)-based colorimetric sensor for As3+ detection was developed and tested in rice extract and water matrices. The paper reports spike-recovery experiments in rice samples to validate the method; no unspiked occurrence measurements of As in rice are provided.
Key numbers
- LOD, linear range, and recovery in rice extract and water in full paper.
- No occurrence data for As in rice; all rice tests are spiked spike-recovery validations.
Methods (brief)
AuNP colorimetric detection of As3+ (arsenite). Speciation-sensitive: detects As(III) specifically. Rice matrix spike-recovery validation. Not equivalent to LC-ICP-MS iAs occurrence measurement.
Implications
Certification: Method development; rice matrix validation but no occurrence data contribution. Courses: Demonstrates AuNP-based colorimetric sensors for arsenic; note As(III)-specific detection vs. regulatory iAs measurement.