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Spectro-photometric method for determination of 2,4-dichlorophenoxy-acetic acid



Spectro-photometric method for determination of 2,4-dichlorophenoxy-acetic acid



Bot Gaz 108(3): 446-449



Spectrophotometric detn. of 2,4-dichlorophenoxyacetic acid in aqueous and ether solns. can be made on solns. containing 0.5-300 [gamma]/ml. The extinction coeff., k, for the acid in water is 9 at 2835 A and 40.6 at 2300 A, and is 9 for the acid in di-1 Io" ethyl ether at 2845 A, if in the formula k =[long dash]logic 7 , c is CX Ax expressed in mg./ml. and x in cm. The use of a blank permits measurement on solns. containing other compounds which absorb in the u.-v. Aqueous solns. of the acid may be concentrated by adjusting the reaction to pH 3-4 and extracting with several portions of diethyl ether.

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Accession: 025508465

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DOI: 10.2307/2472722


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