Spectrofluorimetric determination of cyanide and thiocyanate based on a modified König reaction in a flow-injection system

Autor:	Akira Tanaka, Toshio Deguchi, Kazuhiro Deguchi
Rok vydání:	1992
Předmět:	Detection limit Thiocyanate Cyanide Analytical chemistry Biochemistry Fluorescence Fluorescence spectroscopy Analytical Chemistry chemistry.chemical_compound Wavelength chemistry Excited state Environmental Chemistry Spectroscopy Excitation
Zdroj:	Analytica Chimica Acta. 261:281-286
ISSN:	0003-2670
DOI:	10.1016/0003-2670(92)80203-j
Popis:	Cyanide and thiocyanate were determined spectrofluorimetrically by the isonicotinic acid-barbituric acid (modified Konig) 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5f99544dc7e722e230e15e5014cec436 https://doi.org/10.1016/0003-2670(92)80203-j Zobrazit plný text záznamu