A novel spectrophotometric method for batch and flow injection determination of cyanide in electroplating wastewater

Identification of Diastereomeric Cyano–Aqua Cobinamides with a Backbone‐Modified Vitamin B12 Derivative and with 1H NMR Spectroscopy

“…[16] This behavior seems disadvantageous for the unequivocal assignment of the isolated isomers. For applications such as cyanide detection, only diastereomeric mixtures of "incomplete" cyano-aqua corrinoids have been employed, [17][18][19][20] whereas initial kinetic studies suggest differences in cyanide coordination. [20] The identification and evaluation of well-defined isomers are important with regard to future improvements of corrin-based chemosensors.…”

Recent Advances in the Colorimetric Detection of Cyanide

“…In any of the different approaches either the selectivity, sensitivity or the tolerance towards water has been significantly improved. Never- [40] 6, [62] 7 [64] ). theless, none of these systems seems to be perfect yet and do not meet the three criteria of sensitivity, selectivity and straightforwardness discussed in the introduction.…”

“…A detection limit of 0.8 μM cyanide in water at pH 9.5 has been reported with compound 7. [64] We assume that a mixture of different isomers was applied in these experiments, since we observed in our studies the hydrolysis of the methylester functionalities of 7 under the reported conditions. [66] We communicated recently the optical detection of millimolar cyanide in water at pH 7.5 with commercial available vitamin B 12 .…”

“…[40,[61][62][63][64] Bachas et al incorporated aquocyanocobinamide 6 into fibre-optic chemical sensors (FOCS) and detected after generation of HCN under acidic conditions and diffusion through a membrane as low as 10 μM cyanide within 2 min and no interference of different anions (Scheme 5). [62] Aquocyano-cobester 7 (Scheme 5) [64] and solid-support bound aquocyano-Co(iii) corrinoids [65] are highly sensitive and selective probes for the spectrophotometric detection of cyanide. A detection limit of 0.8 μM cyanide in water at pH 9.5 has been reported with compound 7.…”

Ultra-sensitive determination of cyanide in surface water by gas chromatography–tandem mass spectrometry after derivatization with 2-(dimethylamino)ethanethiol

“…Spectrophotometry has been widely employed in the determination of cyanide through the use of many types of dye [15][16][17][18][19]. Electrochemical methods using sensors have been routinely used for cyanide analysis [20][21][22].…”