Lesage S
J Assoc Off Anal Chem. 1980 Jan;63(1):143-5.
Cupric ions interfered with the carbon disulfide evolution assay method for dithiocarbamate residues in tomato juice and in aqueous solution. Amounts of residue determined were reduced when CuSO4 and a formulation of copper fungicide (Copper-Count-N) were present in the solutions analyzed.