Abstract: A bibliography is presented. All titles are in English. (? references).

Abstract: A bibliography is presented. All titles are in English. (? references).

Abstract: The sample solution is injected into a stream of 0.1 M NaOH, and this solution is mixed sequentially with 0.5 M H3PO4, 0.2% chloramine T solution and, in a 1-m coil heated at 60°C, with a solution containing 1% of isonicotinic acid, 2% of barbituric acid and 1.2% of NaOH. The resulting solution is cooled at 0°C before measurement of the fluorescence at 620 nm (excitation at 605 nm). The range of rectilinear calibration is 0 to 50 µM for CN- and 0 to 40 µM for SCN-; the detection limit is 30 nM. The coefficient of variation is 0.95% (n = 10) for 1 µM-CN-, and sample throughput is 30 h-1. Cyanide and thiocyanate were determined spectrofluorimetrically by the isonicotinic acid-barbituric acid (modified Koenig) reaction method. The resulting solution was excited at 605 nm and the fluorescence was measured at 620 nm. The intermediate was also fluorescent; the excitation and emission wavelengths were 527 nm and 556 nm. The flow injection procedure has a linear calibration range of 0-50 µM cyanide (or 40 µM thiocyanate), detection limits of 30 nM for both anions and a sample throughput of 30 h-1. The relative standard deviation is 0.95% for ten determinations of 1 µM cyanide.