title: [A comparative study of methods of determining the concentration of cobalt in food products. 1. Extraction-photometric methods].
mesh_terms: D003035:Cobalt / Q000032:analysis* / Q000302:isolation & purification; D005433:Flour; D005504:Food Analysis; D005638:Fruit; D008433:Mathematics; D008722:Methods; D009284:Naphthols; D009603:Nitroso Compounds; D010783:Photometry; D014908:Triticum
chemical_list: D009284:Naphthols; D009603:Nitroso Compounds; D003035:Cobalt
vernacular_title: O sravnitel'nom izuchenii metodov opredeleniia soderzhaniia kobal'ta v pishchevykh produktakh. I. Ekstraktsionno-fotometricheskie metody.