Extraction and spectrophotometric determination of molybdenum(VI) with Malachite Green and p-chloromandelic acid.

摘要: Abstract Molybdenum(VI) reacts with p -chloromandelic acid to form a complex extractable into chlorobenzene Malachite Green, from aqueous solution at pH 2.0–4.0 room temperature, and can then be determined indirectly by measuring the absorbance of Green in extract, 630 nm. The calibation graph is linear for molybdenum over range 0.26–10.0 × 10 −6 M (0.10–4.0 μg); apparent molar absorptivity 1.06 x 5 l.mole −1 .cm . method has been applied determination mild steels satisfactory results.