Stability of Metallic Ethylene Bisdithiocarbamates in Chopped Kale

Abstract

Chopped kale samples were fortified with maneb, zineb, or Dithane M-22, a maneb formulation. Samples were stored in a freezer or refrigerator and analyzed daily for 3 days. Using the carbon disulfide evolution procedure, the dithiocarbamate content in the samples was determined. Zineb was more stable than maneb or Dithane M-22 in both the frozen and refrigerated state. Immediately upon mixing, there was a loss of about 10% Dithane M-22 and 25% maneb. Freezing the samples prevented further losses.