title: Replacement of mercury by copper as a Kjeldahl catalyst for the determination of the total nitrogen in cheese.
mesh_terms: D002384:Catalysis; D002611:Cheese / Q000032:analysis*; D003300:Copper; D008628:Mercury; D008832:Microchemistry / Q000379:methods; D009584:Nitrogen / Q000032:analysis*
chemical_list: D003300:Copper; D008628:Mercury; D009584:Nitrogen