Lee, Kum-Tatt published the artcileUse of pyridine-2-aldehyde-2′-pyridylhydrazone for trace analysis of copper in foods, HPLC of Formula: 2215-33-0, the publication is Mikrochimica Acta (1976), 2(5-6), 505-13, database is CAplus.
Aqueous extracts of food were treated with a solution of pyridine-2-aldehyde-2′-pyridylhydrazone [2215-33-0] in 0.01M HCl (100 mg/100 ml) under slightly alk. conditions and the complex between Cu and the reagent was extracted with amyl alc. and the Cu content determined by colorimetry or by at. absorption. In tests with 0-10 mg Cu/20 g sugar and 0-20 μg/0.2 g defatted cocoa, 98-102% of the Cu was recovered by this method.
Mikrochimica 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, HPLC of Formula: 2215-33-0.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem