[Identification of eleven urea herbicides by thin-layer and gas-liquid chromatography. I. Application to natural waters (author's transl)].
By the combined use of two-dimensional thin-layer chromatography and gas chromatography (with an electron capture detector), the authors succeeded in separating and identifying eleven urea herbicides at levels of up to 4 ppb. The method has been applied to natural surface waters.
Chromatography, Gas↗