title: Use of pyridine-2-aldehyde-2'-pyridylhydrazone for trace analysis of copper in foodstuffs.
mesh_terms: D003300:Copper / Q000032:analysis*; D005504:Food Analysis; D006835:Hydrazones; D007202:Indicators and Reagents; D011725:Pyridines
chemical_list: D006835:Hydrazones; D007202:Indicators and Reagents; D011725:Pyridines; D003300:Copper