M. Aguilar et al., Determination of cyanides in electroplating solutions as Ni(CN)(4)(2-) andanalysis by capillary electrophoresis, FRESEN J AN, 363(1), 1999, pp. 121-123
A CE method was developed for the determination of total (free and weakly b
ound) cyanide in electroplating solutions based on the use of a cationic su
rfactant (TTAB) and complexation with Ni(II)-NH3 solutions to Ni(CN)(4)(2-)
. Both direct complexation and cyanide distillation combined with complexat
ion were tested. Under optimized conditions, this method is time-saving com
pared to standard methods. Total cyanide determined by CE had detection lim
its (with respect to the initial sample concentration) of 0.5 mu g/mL for d
irect complexation and 50 ng/mL for distillation combined with complexation
. Total cyanide and cyanide not amenable by chlorination (CNAC) were determ
ined in real samples from spent electroplating baths.