Mecoprop 2-

Ether Cle va.ge, This is commonly observed as the initial step in the metaboHsm of the phenoxy herbicides 2,4-D (1), (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T), and mecoprop (17). A wide variety of bacteria have been isolated which are able to catalyze this reaction (eq. 

Mecoprop is also found frequently in surface freshwaters. MAFF have recognized this and taken action. Mecoprop is a mixture of two different chemical forms, only one of which has herbicidal activity. Historically, products contained a mixture of both forms, resulting in the need for high doses to achieve the desired effect. However, it is now possible to separate the herbicidally active form... 

It is interesting to note that many of the agricultural pesticides exceed 0.1 /tg D S but very few have been recorded as failing these operational standards. In 1993 there were no failures in environmental waters for isoproturon, chlorotoluron, mecoprop or MCPA. 

TARGET , dicamba,+ MCPA+ mecoprop, 125 Tate Lyle Group Pic, 213 Tatneft, 198... 

Nickel K, MJ-F Suter, H-PE Kohler (1997) Involvement of two 3-ketoglutarate-dependent dioxygenases in enantioselective degradation of R)- and (S)-mecoprop by Sphingomonas herbicidovorans MH. Appl Environ Microbiol 63 6674-6679. 

Tett VA, AJ Willetts, HM Lappin-Scott (1994) Enantioselective degradation of the herbicide mecoprop [2-methyl-4-chlorophenoxypropionic acid] by mixed and pure bacterial cultures. FEMS Microbiol Ecol 14 191-200. 

Zipper C, K Nickel, W Angst, H-PE Kohler (1996) Complete microbial degradation of both enantiomers of the chiral herbicide Mecoprop [(R,S)-2-(4-chloro-2-methylphenoxy)]propionic acid in an enantioselective manner by Sphingomonas herbicidovorans sp. nov. Appl Environ Microbiol 62 4318-4322. 

Restricted access phases are another approach to exploiting the differences in characteristics of analytes. Large analytes are excluded from an internal surface on which an adsorptive stationary phase is present. A herbicide analysis for Metsulfuron methyl, Bentazone, Bromoxynil, methylchlorophenoxy acid, and Mecoprop in the presence of humic acid was performed on restricted access reversed phase media.52 The cytostatic compound epirubicin and its metabolites were separated from plasma using a Pinkerton GFF II column.53 Gradient separations of polymers on reversed phase and on normal phase represent an alternative to gel permeation chromatography. Polyesters of noncrystalline materials were separated on a variety of such phases.54... 

Buser, H.-R., Muller, M. D. and Theobald, N. (1998). Occurrence of the pharmaceutical drug clofibric acid and the herbicide mecoprop in various Swiss lakes and in the North Sea, Environ. Sci. Technol., 32, 188-192. 

Many methods have been reported for the extraction of these compounds from soil. Khan [225] used acidified acetone followed by methylation with diazomethane for the simultaneous determination of 2,4-D, Dicamba and Mecoprop residues, as did Bache and Lisk [226] for Ioxynil. Abbott et al. [227] developed a method for MCPA, MCPB, 2,4-D Dichloroprop and 2,4,5-T in which dilute sulphuric acid and diethyl ether were used for extraction. Byast et al. [101] have shown that diethyl ether-chloroform-acetic acid is a suitable extractant for 2,4,5-T, 2,4-D, Dichloroprop and Dicamba [101] and saturated calcium hydroxide solution is efficient for Picloram [228] and 3,6-dichloropicolinic acid [229]. 

Smith and Fitzpatrick [252] have also described a thin layer method for the detection in water and soil of herbicide residues, including Atrazine, Barban, Diuron, Linuron, Monuron, Simazine, Trifluralin, Bromoxynil, Dalapon, Dicamba, MCPB, Mecoprop, Dicloram, 2,4-D, 2,4-DB, Dichloroprop, 2,4,5-T, and 2,3,6-trichlorobenzoic acid. 

Herbicides 2,4-D, MCPA, Mecoprop, 4-(2,4-DB), TCA, Amitrole, Dalapon, Monuron, Chlorpropham, Endothal, Pyrazon, and DNOC. 

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