Diuron, determination

In the 3rd PT campaign, for isoproturon and diuron determination in both RM15 and RM17 the ELISAs were used in the coating antigen format which is usually less sensitive compared to the enzyme-tracer format. 

A solvent free, fast and environmentally friendly near infrared-based methodology was developed for the determination and quality control of 11 pesticides in commercially available formulations. This methodology was based on the direct measurement of the diffuse reflectance spectra of solid samples inside glass vials and a multivariate calibration model to determine the active principle concentration in agrochemicals. The proposed PLS model was made using 11 known commercial and 22 doped samples (11 under and 11 over dosed) for calibration and 22 different formulations as the validation set. For Buprofezin, Chlorsulfuron, Cyromazine, Daminozide, Diuron and Iprodione determination, the information in the spectral range between 1618 and 2630 nm of the reflectance spectra was employed. On the other hand, for Bensulfuron, Fenoxycarb, Metalaxyl, Procymidone and Tricyclazole determination, the first order derivative spectra in the range between 1618 and 2630 nm was used. In both cases, a linear remove correction was applied. Mean accuracy errors between 0.5 and 3.1% were obtained for the validation set. 

J. V. Sancho, C. Hidalgo and P. Hernandez, Direct determination of bromacil and diuron residues in environmental water samples by coupled-column liquid cliromatog-raphy and large-volume injection , 7. Chromatogr. 761 322-326 (1997). 

Ferrer and Barcelo [394] used sobd-phase extraction coupled with LC-MS to determine diuron, irgalol, and chlorothalonil in seawater in amounts down to lng/l. 

Following the earlier work of Kirkland [125] on phenylurea herbicides, Sidwell and Ruzicka [126] applied liquid chromatography to the identification and determination of active ingredient contents of phenylurea herbicide formulations. Smith and Lord [118] have used liquid chromatography for the determination of Chlorotoluron residues in soil, but Diuron and Monuron interfered in their chromatographic system. 

Smith and Lord [118] have used liquid chromatography for the determination of Chlorotoluron residues in soil but report that Diuron and Monuron interfere in the chromatographic system used. 

Cotterill [119] compared two methods, high-performance liquid chromatography and gas chromatography for the determination of Diuron in soil. 

SPE LC/MS/MS methods have been developed for the determination of polar pesticides (as propanyl, thiobencarb, diuron, simazine, bentazone etc.) and of their degradation products in waters with LOQ aronnd 25 ng L (Figure 18.1) [73], for the determination of chloroacetamide herbicides (LOD=25ng L ) [74], of sulfonylureas, bentazone, and phenoxyacids in river and drainage waters (LOD of the order of few ng L" ) [9]. 

JJ Kikland. Trace analysis by programmed temperature gas chromatography. Simultaneous determination of monuron and diuron herbicide residues. Anal Chem 34 428-433, 1962. 

C Parouchais. Determination of diuron in wheat. J Assoc Off Anal Chem 56 831-833, 1972. 

CB Ely, RE Frans, TL Lavy, RE Talbet, JD Mattice. Determining diuron, simazine, and methiocarb residues in highbush blueberries (Vaccium corymbosuni). Hort Science 28 33-35, 1993. 

JF Lawrence, C Van Buuren, UATh Brinkman, RW Frei. Use of ethylation for the gas and liquid chromatographic determination of linuron, diuron and metoxuron and two of its degradation products application to soil analysis. J Agric Food Chem 28 630-632, 1980. 

HL Pease. Separation and colorimetric determination of monuron and diuron residues. J Agric Food Chem 10 279-281, 1962. 

G Kulshrestha. Single step extraction an clean-up for determination of diuron in soil. J Assoc Anal Chem 62 1191-1192, 1979. 

SE Katz. Determination of the substituted urea herbicides linuron, monuron, diuron, neburon and fenuron in surface waters. J Assoc Off Anal Chem 49 452-456, 1966. 

F. M. Langas, S. R. Rissato and M. S. Galhiane, Off-line SFE-MEKC determination of diuron in sugar cane and orange samples , J. High Resolut. Chromatogr. 21 519-522... 

Figure 13.14 LC-diode-array detection (DAD) chromatogram (at 220 nm) obtained after preconcentration of 50 ml of ground water sample spiked with various pollutants at levels of 3 p.g l-1 passed through (a) a PLRP-S cartridge and (b) an anti-isoproturon cartridge. Peak identification is as follows 1, chlortoluron 2, isoproturon plus diuron 3, linuron 4, diben-zuron , water matrix. Reprinted from Journal of Chromatography, A 777, I. Ferrer et al. Automated sample preparation with extraction columns by means of anti-isoproturon immunosorbents for the determination of phenylurea herbicides in water followed by liquid chromatography diode array detection and liquid chromatography-atmospheric pressure chemical ionization mass spectrometry , pp. 91-98, copyright 1997, with permission from Elsevier Science.

McNally et al. have applied supercritical fluid extraction chromatography to the determination of diuron and linuron in soil [442]. Schlaeppi et al. [443] have described an automated magnetic particle-based chemiluminescent immunoassay for the determination of trisulfuron in soil [462]. 

Bacigalupo, M.A. and G. Meroni. 2007. Quantitative determination of diuron in ground and surface water by time-resolved fluoroimmunoassay Seasonal variations of diuron, carbofuran, and paraquat in an agricultural area. J. Agric. Food Chem. 55 3823-3828. 

Ruepert and Ploeger [170] have described a procedure which allows the simultaneous determination of 22 pesticides (eg metamitron, simazine, diuron chlorpham) which is applicable to potable, ground and surface waters. The method relied on high performance... 

A similar finding was noted during the development of analytical methodology for the determination of urinary chlorinated anilines. It was found that much more 3,4-dichloroaniline could be extracted from the urine of rats fed diuron and linuron if an acid hydrolysis step was used prior to extraction (24). When using hydrolysis in an analytical procedure, the chemist must determine if the compound of interest is stable to the conditions used. 

Figure 1. Influence of surfactants on leaching depth of diuron as determined by 50% kill of oats in 2-inch soil columns...

Analytical method for the determination of atrazine, diuron and isoproturon... 

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