title: Simultaneous determination of nickel, lead, zinc, and copper in citrus leaves and rice flour by liquid chromatography with hexamethylenedithiocarbamate extraction.
mesh_terms: D002853:Chromatography, Liquid; D002957:Citrus / Q000032:analysis*; D003300:Copper / Q000032:analysis; D005433:Flour / Q000032:analysis*; D007854:Lead / Q000032:analysis; D008670:Metals / Q000032:analysis*; D009532:Nickel / Q000032:analysis; D012275:Oryza / Q000032:analysis*; D013859:Thiocarbamates; D015032:Zinc / Q000032:analysis
chemical_list: D008670:Metals; D013859:Thiocarbamates; D007854:Lead; D003300:Copper; D009532:Nickel; C047222:hexamethylenedithiocarbamic acid; D015032:Zinc