M‐(p‐Nitrobenzyl) pyridine as a spray reagent for the thin‐layer chromatographic detection of dimethyl tetrachloroterphthalate herbicide |
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Authors: | M T H Ragab |
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Institution: | Research Station , Agriculture Canada , Kentville, Nova Scotia, B4N 1J5 |
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Abstract: | Abstract The developed thin‐layer chromatogram of DCPA (Dacthal) is sprayed with 4‐(p‐nitrobenzyl)pyridine chromogenic reagent followed by ammonium carbonate solution. The chromatogram is then heated in an oven at 130°C for 20 minutes. When cool, the chromatogram is sprayed with tetraethylenepentamine reagent. DCPA spots appear blue against a white background. The sensitivity of this test is about 1 μg. The procedure is useful to detect DCPA in water and in soil. |
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Keywords: | Herbicides pesticides Dacthal chlorthal DCPA 4‐(p‐nitrobenzyl)pyridine TLC |
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