Innovative Design of Sustainable On-Off Fluorescence-Mode Technique for Facile Measurement of Brexpiprazole, a New Antipsychotic Therapy in Different Matrices; Content Uniformity Evaluation; Comprehensive Sustainability Profiling.

Recently, a new antipsychotic treatment called brexpiprazole (BPZ) has been used to treat schizophrenia and other forms of psychosis. A straightforward, sensitive, precise, and environmentally friendly spectrofluorimetric technique was developed to measure it by forming an ion-pair association complex with Eosin Y. The dye's intrinsic fluorescence recorded at λ_em = 540 nm (λ_ex was 302 nm), is reduced when an ion-pair complex develops. The approach's settings for generating the brexpiprazole-eosin dye association complex were adjusted in the concepts of analysis. In the Britton-Robinson neutralizing solution (pH 4.0), the reaction was conducted. In the 100-1500 ng mL^- 1 range, the dye's fluorescence emission intensity dropped linearly, and the correlation value was 0.9998. The values for the sensitivity (LOQ & LOD) limits were 83.4 and 27.5 ng mL^- 1. The ICH standards have been followed in the validation of the suggested approach. Moreover, content uniformity analysis was also successfully conducted with it. Finally, the established system's greenness was evaluated using several recent analytical tools: the Eco-Scale, the Analytical Greenness metric approach (AGREE), the National Environmental Method Index (NEMI), the Green Analytical Procedure Index (GAPI), and GSST (Green Solvents Selecting Tool). Also, the method's whiteness, as well as blueness, were evaluated using modern Red Green Blue 12 model (RGB12) and Blue Applicability Grade Index (BAGI) tools.