A simple square wave voltammetric method for the determination of aclonifen herbicide


İNAM R. , Cakmak Z.

ANALYTICAL METHODS, cilt.5, ss.3314-3320, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 5 Konu: 13
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1039/c3ay40333e
  • Dergi Adı: ANALYTICAL METHODS
  • Sayfa Sayıları: ss.3314-3320

Özet

A cyclic voltammogram of aclonifen was obtained on a glassy carbon electrode at pH 4.0 during the potential scan from 0.00 mV to 1400 mV vs. Ag/AgCl (3 mol L-1 NaCl). From repetitive cyclic voltammograms, one anodic peak at + 1175 mV and one cathodic peak on the reverse scan at + 350 mV were recorded. The sensitive square wave anodic peak at + 1220 mV was linearly related to aclonifen concentration ranging from 0.245 to 3.70 mu g mL(-1). The limit of detection (LOD) and the limit of quantification (LOQ) were 0.073 mu g mL(-1) and 0.245 mu g mL(-1), respectively. The percent recoveries of aclonifen calculated from soil and water samples spiked with 1.0 mu g mL(-1) level were 98.80% and 102.40% with the relative standard deviations of 1.82 and 3.61%, respectively. The method was also applied to the herbicide formulation Challenge (R) 600 and the average content of 595.3 +/- 9.73 g L-1 (n = 7, % 95 confidence interval) was consistent with the 600 g L-1 aclonifen level quoted by the manufacturer. The considerably high recoveries and low standard deviations provide evidence for the high accuracy and precision of the recommended method.