Three chemical derivatization techniques for triazine herbicides were examined for the confirmation of these compounds in plant material. Methoxylation of chloro-s-triazines carried out in sodium methoxide-methanol quantitatively yielded the corresponding methoxy analogs. Thus, atrazine, simazine, and propazine were converted to atratone, simetone, and prometone, respectively. The methylation of triazines containing secondary amino substituents was readily accomplished with methyl iodide-sodium hydride in di-