Ultraviolet spectrophotometric determination of the purity of technical pyrazon

摘要

AbstractA method for the analysis of technical samples of the herbicide pyrazon is described. A double‐beam recording spectrophotometer with digital data recording accessory was used in the analysis of the multicomponent mixtures. The absorbances were measured in the u.v. region between 346 and 282 nm. Two alternative u.v. spectrophotometric methods are presented which allow the determination of all three components in technical products of pyrazon without any preliminary separatio