Since 3,6-dichloropicolinic acid is simil8r to picloram, the method developed previously for picloram by McKone and Cotterill (1974) was examinedo This method~ like that of Pik and Hodgson, uses diazomethane for methylationo However~ the methyl ester of 3 87 acid is sufficiently volatile for losses fo occur during the final concentration stepo This report shows how tbe difficulty tan be overcom...