Burns, D. Thorburn published the artcileSpectrophotometric or spectrofluorimetric determination of cobalt in steels by extraction as bis[1-(2-pyridylmethylene)-2-(2-pyridyl)hydrazine]cobalt(III) dimethoxyanthracenesulfonate, Synthetic Route of 2215-33-0, the publication is Analytica Chimica Acta (1983), 151(1), 245-9, database is CAplus.
The steel sample was dissolved and Co was reacted with 1-(2-pyridylmethylene)-2-(2-pyridyl)hydrazine (PAPY) and dimethoxyanthracenesulfonate (DMAS) at pH 3 to form an ion-pair complex. The latter was extracted into 1:9 Me2CO-1,2-dichloroethane. The absorbance and fluorescence of the organic phase was measured at 496 nm and 450 nm (λexc = 396 nm), resp. Beer’s law was obeyed for 0-5 μg Co/10 mL. The relative standard deviation was 1.3 and 1.5% for the spectrophotometric and fluorometric, resp., determination of 4 μg Co. The molar absorptivity of the Co(PAPY)2DMAS ion-pair complex was 3.23 × 104. The detection limit was 0.003 and 0.004 μg Co/mL for the spectrophotometric and fluorometric determination, resp. The effect of diverse ions was studied.
Analytica Chimica Acta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Synthetic Route of 2215-33-0.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem