A simple and novel system for colorimetric detection of cobalt ions

Abstract

A simple and novel method for the colorimetric detection of Co(2+) was developed based on controlling the oxidation level of methylene blue (MB). After a complex was formed between MB, 2-aminothiophenol (ATP) and copper nitrate (MB-ATP-Cu(2+)), the sensing of Co(2+) showed high selectivity. The mechanism of sensing has also been discussed.

Thiourea dioxide as a unique eco-friendly coreactant for luminol chemiluminescence in the sensitive detection of luminol, thiourea dioxide and cobalt ions

“…In comparison with other reported CL Co 2+ detection methods, our method is very sensitive and simple. [35][36][37][38][39][40][41] The detection of metal ions by conventional luminol CL methods experiences easy interference from other metal ions. It is thus desirable to develop a method for selective detection.…”

Dehydroacetic acid derived Schiff base as selective and sensitive colorimetric chemosensor for the detection of Cu(II) ions in aqueous medium

“…The fabrication and implementation of colorimetric chemosensors for the detection of such ionic species is a better option than the sophisticated and complicated conventional instrumentations [4,5]. The conventional instrumentation techniques available for detection of the metallic species involve time-consuming pre-sample treatment, complex experimentation and sophisticated handling, which limits their routine application.…”

A Highly Selective and Sensitive Fluorescent Turn-Off Probe for Cu2+ Based on a Guanidine Derivative

“…Numerous methods to detect metal ions have been developed, such as atomic absorption spectrometry [ 20 ], inductively coupled plasma atomic emission spectroscopy [ 21 ], visual detection [ 22 , 23 ], chemiluminescence detection [ 24 ] and electrochemical techniques [ 25 , 26 ]. However, these methods have disadvantages, such as expensive instrumentation, complicated sample preparation and tedious operating procedures, resulting in the need for other sensitive, simple detection methods for copper ions.…”