Convenient and sensitive colorimetric detection of melamine in dairy products based on Cu(ii)-H₂O₂-3,3′,5,5′-tetramethylbenzidine system

Abstract

Convenient and sensitive colorimetric detection of melamine in dairy products based on a Cu(ii)-H2O2-3,3′,5,5′-tetramethylbenzidine system was reported.

An aptamer and flower-shaped AuPtRh nanoenzyme-based colorimetric biosensor for the detection of profenofos

“…The extractant was evaporated under the N 2 stream. 39 The residue was reconstituted with 10 mL of ultrapure water, and then the sample solution was filtered with filter papers (pore size 30, 10, 5 μm) for the detection.…”

Picomolar-Level Melamine Detection via ATP Regulated CeO2 Nanorods Tunable Peroxidase-Like Nanozyme-Activity-Based Colorimetric Sensor: Logic Gate Implementation and Real Sample Analysis

“…Advancing nanostructured-based sensing has routed interest toward real-time pointof-care (POC) sensing devices, while efforts in emulating the Boolean functions on the molecular scale [23], which are capable of performing logic gate operations to produce an output signal in the form of optical, electrical responses, have opened the possibility of design and realization of "stimuli-responsive nanoscale sensing devices" [24]. A variety of metal, metal oxide NPs, and metal ions [12,[25][26][27] have already been reported as colorimetric sensors for MEL. Though some hold high accuracy and sensitivity, it is vital to develop a simplified operational and highly sensitive platform to meet the established safety limits [28,29].…”