Determination of thiourea using a carbon paste electrode decorated with copper oxide nanoparticles

Carbon Paste Electrodes

“…By analog to the closing notes on unmodified carbon pastes, the current status and position of chemically and biologically modified variants can be illustrated via a collection of more or less accidentally selected articles published in the last 2 years [182][183][184][185][186][187][188][189][190][191][192][193][194][195][196][197][198][199][200], taking into account also the advances highlighted in the newest review [90].…”

“…Thus, among the modifiers of choice, (i) various nanomaterials are of continuing interest [184,191,196], including nanotubes [190,197] applicable as an alternate component(s) or adduct(s) with distinct catalytic properties. Similarly acting are then (ii) solgel and sonogel-based modifiers [90,194], or (iii) mesoporous structures [184,198] that all are able of altering, in a singnificant way, the surface characteristics of the resultant CMCPE(s).…”

“…Regarding the analytes in focus, one can mention the determination of frequently monitored toxic heavy metals [183,184,188,189], some less-frequent and electrochemically challenging ions, such as Cs + [185], Lu 3+ [195], and S 2− [190], permanent attention is paid to organic pollutants [182,194,196], pharmaceuticals [193,198], food additives [187], and principal substances among BICs [186,191,197].…”

“…This can be documented by three actual examples from the selection of newest contributions presented here [182][183][184][185][186][187][188][189][190][191][192][193][194][195][196][197][198][199][200], when common CPEs had surpassed in their performance even carbon nanotube paste electrodes (CNTPEs) or a CILE and could thus be proposed as the electrodes of choice for determination of caffeine [192], myristicin [199], and nicotine [200]. Also, this indicates that the carbon paste -regardless if one uses highly sophisticated chemically and biologically modified systems or remains faithful to classical formulations -still represents one of the most popular materials used for preparation of electrode and sensors in modern electrochemistry and electroanalysis, as well as in some other areas of instrumental measurements.…”

Cocrystallization through the use of a salt: The case of thiourea with a new propanediammonium oxalate salt

“…Several methods have been reported for the determination of trace amounts of thiourea by Raman spectroscopy [15], spectrophotometry [16], titrimetry using iodine [17], high performance liquid chromatography (HPLC) [18] electrochemical methods etc. [19][20][21][22][23][24][25].…”