2.6- Dichloro-4- phenoxyacetate esters

Dichloro-4-(l,l, 3,3-tetra-methylbutyl)phenoxyacetate esters, to protect alcohols, 114... 

Hydrolysis Catfish, Bluegill 2,4-Dichloro-phenoxyacetic acid esters... 

D Esters Butoxyethyl 2,4-Dichloro-phenoxyacetate Butyl 2,4-Dichloro-phenoxyacetate 2, 4-Dichloro-phenoxyacetic Acid Butoxyethyl Ester... 

CD oi Q a. o 15 o Ph Isopropyl ester of 2,4-D DCPA 2,4-D ester Dacthal isopropyl ester of 2,4-dichloro-phenoxyacetic acid tetrachloroterephthalic acid, dimethyl ester... 

Butyl2,4-Dichlorophenoxyacetate 2,4-Dichloro-phenoxyacetic Acid, Butoxyethyl Ester 2,4-Dichlorophenoxyacetic Acid, Isopropyl Ester Isopropyl... 

Devine et al. [188] adjust the water sample (IL) to pH2 with hydrochloric add and extract it with benzene (100, M and 50mL). The extract is dried over sodium sulphate, concentrated to O.lmL and methylated by the addition of diazomethane in ethyl ether (ImL). After lOmin, the volume is reduced to about O.lmL, acetone is added and an aliquot is analysed by gas chromatography on one of three columns (1) 5% SE-30 on 60-W mesh Chromosorb W at 175°C, (2) 2% QF-1 on 90-100 mesh Anakron ABS at 175°C or (3) 20% Carbowax 20m on 60-80 mesh Chromosorb W at 220 C. In each instance nitrogen is the carrier gas and detection is by electron capture. The minimum detectable amount of pesticide in water was 2 parts per 10 for MCPA (4-chloro-2-methyl-phenoxyacetic add) and 0.01-0.05 parts per 10 for 2,4-D (2,4-dichloro- henoxyacetic add) and its esters, 2,4,5-T (2,4,5-trichlorophenoxyacetic add), Dicamba, Trifluralin (2-methoxy-3,6-dichlorobeim>ic add), and Fenoprop. Recoveries were 50-60% for MCPA and Dicamba and 80-95% for the other compounds. 

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