Simultaneous polarographic determination of parathion and paraoxon. Catalytic hydrolysis of parathion by palladium(II)

Abstract

The present work describes an electroanalytical study of the poiarographlc behavior (DPP) of the pesticides paratwon and paraoxon In the presence of Pd( I I). Thls metalilc Ion shows affinity for the thiophosphate group and catalyzes the hydrolysis of paratMon but not paraoxon. A method Is proposed for the simultaneous determination of both pestlcldes based on the fact that parathion can be determlned by measuring the p-nitrophenol formed after the addnlon of Pd(II), whereas paraoxon can be measured directly by Its reductton peak. I n

Amperometric Method for the Determination of Propanil in a Simulated Rice Field Environment

“…The field was well drained out before the herbicide was sprayed in order to expose weeds. After 3 d of pesticide introduction, the bed was watered up to a level of 2.0 cm, and water drained through soil was collected a t the bottom a t time intervals of 0.00 h, 0.50 h, 1.00 h, 2.00 h, 4.00 h, 6.00 h and 8.00 h.…”

Electrochemical Methods in Pesticides Control

“…[14] As with the triazines, some of these pesticides contain nitro groups that can be adsorbed onto the surface of mercury electrodes, and therefore a large number of studies report the use of AdSV for the quantification of this group of pesticides in samples containing very small amounts of these contaminants.…”

Highly Efficient Degradation of Thiophosphate Pesticides Catalyzed by Platinum and Palladium Aryl Oxime Metallacycles

“…It has been previously noticed that Pd II complexes could be promising catalysts in reaction (1). [14] Cycloplatinated compounds with coordinated oxime could be used to create even more specific and reactive catalysts.…”