Collaborative study of the gas chromatographic determination of six thiocarbamate herbicides in formulations
Barney, J.E.
Journal - Association of Official Analytical Chemists 57(1): 53-59
1974
ISSN/ISBN: 0004-5756 PMID: 4814327 Document Number: 77789
Eptam, Ordram, Ro-Neet, Sutan, Tillam, and Vernam thiocarbamate herbicides are determined in emulsifiable and granular formulations by gas chromatography on an OV-1, SE-30, or OV-17 column with a flame ionization detector. Another thiocarbamate is used as an internal standard. The method was tested collaboratively by 19 laboratories, 18 of which tested the method on all 6 thiocarbamates. The coefficient of variation for 12 formulations was 3.10%. A significant amount of systematic error was detected, particularly in the analysis of emulsifiable formulations. The method has been adopted as official first action, and it is recommended that additional studies be conducted.