Abstract
The crossed-beam thermal-lens detector is applied to capillary liquid chromatography for the separatin of picomole amounts of 2,4-dinitrophenylhydrazones. A relatively inexpensive instrument is described, which utilizes a 3-mW helium—cadmium pump laser and a low-power helium—neon probe laser. Detection limits of 120 fmol of acetone (injected) are obtained.
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