Ouyang, Zhen-zhong published the artcileDetermination of trace scandium in fly ash by calcein fluorescence spectrophotometry, Category: pyrazoles-derivatives, the publication is Yejin Fenxi (2015), 35(6), 53-56, database is CAplus.
The fluorescence reaction between calcein and scandium(III) was studied. The results showed that trace scandium(III)ions could react with calcein to form complex in NH3·H2O-NH4Cl buffer solution at pH8.5in presence of surfactant Triton X-100, and the fluorescence intensity of this system was enhanced significantly. The excitation wavelength and emission wavelength was 495 nm and 520 nm, resp. The content of scandium (III)in range of 0.021-1.80μg/mL exhibited good linearity to its fluorescence intensity difference(ΔF). The equation of linear regression wasΔF=3.431+2.473ρ (μg/mL)with correlation coefficient of r=0.998 1. The detection limit was 0.021μg/mL. The interference tests indicated that most common ions did not interfere with the determination after scandium in fly ash sample was extracted and separated with 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP)-toluene. The proposed method was applied to determination of trace scandium in fly ash samples. The results were consistent with those obtained by inductively coupled plasma at. emission spectrometry (ICP-AES). The relative standard deviation(RSD, n=6)was 0.57%-1.0%. The recoveries were between 98% and 105%.
Yejin Fenxi published new progress about 4551-69-3. 4551-69-3 belongs to pyrazoles-derivatives, auxiliary class Benzenes, name is 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, and the molecular formula is C17H14N2O2, Category: pyrazoles-derivatives.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics