Spectrophotometry -Kinetic Determination of Thioketones

Determination of thiourea in fruit juice by a kinetic spectrophotometric method

“…These are based on direct reflectance spectrometric measurements [23][24][25], Raman spectroscopy [26], mass spectrometry [27], FTIR [28,29], voltammetry [16], potentiometry [30], amperometry [31], titrimetry with iodine [32], potassium dichromate [33] and Masson and Race reagent [34], gas chromatography after benzoylation [35], highperformance liquid chromatography [36], flow injections methods [37][38][39] and kinetic methods [40,41]. Catalytic kinetic spectrophotometric method is a suitable technique for determination of trace levels of thiourea because of its high sensitivity and selectivity and ease of instrumentation.…”

Kinetic aspects of analytical chemistry

“…Yatsimirskii and co-workers (71) measured ascorbic acid by means of its activation of the oxidation of iodide by C103" in the presence of vanadium(V). A procedure for thioketones, described by Richmond et al (72), involves the catalytic acceleration of the iodine-azide reaction. Microgram amounts of rubeanic acid and its derivatives were determined by their effect on the iodine-azide reaction (73).…”

Ultraviolet and light absorption spectrometry

“…NaOH) [395; 6.2 X 103] Redn. to NH, with Ti2(S04)3, meas, gaseous NH3 [201] 2,4-Xylenol [455] Dissolved 02 Water…”