title: Bis(6-methyl-2-pyridyl)glyoxal dihydrazone as a spectrophotometric reagent for the rapid determination of copper in alkalis, milk and brine.
mesh_terms: D000468:Alkalies / Q000032:analysis*; D000818:Animals; D001322:Autoanalysis; D003300:Copper / Q000032:analysis*; D006834:Hydrazines; D006835:Hydrazones; D007202:Indicators and Reagents; D008722:Methods; D008892:Milk / Q000032:analysis*; D012492:Salts / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet; D014131:Trace Elements / Q000032:analysis
chemical_list: D000468:Alkalies; D006834:Hydrazines; D006835:Hydrazones; D007202:Indicators and Reagents; D012492:Salts; D014131:Trace Elements; D003300:Copper