Methods for Detecting Picric Acid—A Review of Recent Progress

Nitroaromatic compounds in general and 2,4,6-trinitrophenol (picric acid) in particular have recently attracted significant research attention as environmental contaminants. This spurred a wave of development regarding the methods of detecting these compounds. This work focuses on picric acid as the most common and problematic of these contaminants. The key classes of materials sensitive to picric acid are indicated, and recent developments are discussed in detail. Particular attention is given to the detection and speciation capabilities of the discussed materials and methods utilising them, with various technical considerations noted as relevant.