| Abstract: | A rapid sensitive gas chromatographic procedure for the detection of glyphosate (N-phosphonomethyl glycine) in soils was developed. Glyphosate is the active ingredient of Roundup[^]R, the isopropylamine salt of glyphosate, a very broad spectrum herbicide. The procedure developed allows for analysis of 12 samples per day or 36 samples per 2 days. This is a considerable improvement over the procedures previously published in the literature. Also, this procedure has the advantage of not requiring any specialized equipment as the current procedure does and detection can be accomplished using either a flame ionization, flame photometric, or electron capture detector. Soil extraction efficiency approached 100% for a series of soils with a wide range of properties. The lower limit of detection was found to be less than 0.4 ppb using a 25 g sample. |
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