Uzoukwu, B. A. published the artcile1-Phenyl-3-methyl-4-trifluoroacetyl-5-pyrazolone (HPMTFP) as an extraction and spectrophotometric reagent for vanadium (V), Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is vanadium determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent vanadium determination.
A rapid and efficient method for the determination of a large quantity of V(V) in an aqueous medium using HPMTFP is described. The percentage extraction as a function of pH of aqueous medium is reported and quant. extraction of V(V) occurs in the pH range of 1.7-2.3. The properties of the color of the extracted complex species with respect to pH of solution, various solvents, time and presence of diverse ions are reported. Beer’s law is valid up to 100 ppm of V (V) (ε = 1.1 × 102 L mol-1 cm-1).
Journal of the National Science Council of Sri Lanka published new progress about vanadium determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent vanadium determination. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one.
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics