Conclusion
Although this method gives similar limits of detection and recoveries to that of Pik and Hodgson, the reduced background and introduction of the less volatile ester gives it some advantage especially for soils with high organic matter content with their associated high background response.
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References
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McKONE, C.E. and COTTERILL, E.G.: Bull. environ. contamin. Toxic.,11, 233–237 (1974)
McKONE, C.E. and HANCE, R.J.: J. Chromatogr.,69, 204–206 (1972)
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Cotterill, E.G. Determination of 3,6-dichloropicolinic acid residues in soil by gas chromatography of the 1-butyl ester. Bull. Environ. Contam. Toxicol. 19, 471–474 (1978). https://doi.org/10.1007/BF01685828
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DOI: https://doi.org/10.1007/BF01685828