3-Hydroxy-2-[1′-phenyl-3′-(p-chlorophenyl)-4′-pyrazolyl]-4-oxo-4H-1-benzopyran as a spectrophotometric reagent for trace determination of tungsten(vi) (original) (raw)

Extractive Spectrophotometric Determination of Tungsten(VI) Using 3-Hydroxy-2-(2'-Thienyl)-4-OXO-4H-1- Benzopyran

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