Analysis of dithiocarbamates and thiuram disulphides used in agriculture. I.—Collaborative study of macro‐methods available for the evaluation of technical and formulated products

Abstract

Abstract The paper details results found in a recent collaborative study of methods of analysis for the dithiocarbamates and thiuram disulphides. In order to ensure maximum accuracy, reproducibility, and simplicity of apparatus and operation, preference is given to macro‐volumetric methods for determining the products of acid hydrolysis, i.e., carbon disulphide and, where possible, the combined amine. Shortcomings of previously published methods are illustrated, and alternative procedures given which are now accepted as official methods for zineb, maneb and thiram in technical products and simple formulations. More complex formulations, including admixtures with copper and mercury salts, will be dealt with in a later paper.