Abstract
The complexation of molybdenum(VI) with Pyrocatechol Violet (PCV) in the absence or presence of a cationic surfactant, cetyltrimethylammonium (CTMA), was studied. Conditions for the preconcentration of molybdenum(VI) as its PCV complex on adsorbents of different nature were found. Concentration factors were at least 67 at a liquid phase volume of 20 mL and for an adsorbent sample of 0.3 g. Chromaticity characteristics of complexes were determined in the solution and on the adsorbent. It was shown that the PCV complex of molybdenum(VI) in the presence of CTMA can be used in the analysis of low-molybdenum samples. A test scale for the semiquantitative determination of molybdenum was obtained.
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