An indolium ion-based colorimetric sensor for naked-eye detection of cyanide and ammonia: on-site detection technique for cyanide in natural sources and day-to-day monitoring of food spoilage.

Herein, we developed an easy-to-synthesize, simple colorimetric probe and demonstrated its potential for the detection of anions and amines. The probe was capable of detecting CN selectively among other anions and could detect the presence of all tested amines. It exhibited obvious colour and spectroscopic changes in the presence of the said analytes.

A highly selective solution and film based sensor for colorimetric sensing of arginine in aqueous and blood samples.

A benzothiazole-azo based sensor (BTAN) was developed for rapid and on-site detection of arginine. The sensor's selectivity in a semi-aqueous medium was thoroughly investigated, focusing on the colorimetric response to arginine in the presence of 11 different amino acids. Notably, the limit of detection (LOD) for arginine was determined to be 0.