title: A new sensitive method for the spectrophotometric determination of molybdenum using 3-hydroxy-2-(2'-thienyl)-4H-chromen-4-one.
abstract: A spectrophotometric method has been developed for the determination of Molybdenum (VI) using 3-hydroxy-2-(2'-thienyl)-4H-chromen-4-one as a complexing agent. The complex formed was dissolved in water in the presence of Triton X-100 and exhibits an absorption maximum at 410 nm. A large number of metal ions like Co(II), Ni(II), Mn(II), Cr(III), Zn(II), Cu(II), Hg(II), Bi(III), Fe(II), Fe(III), Zr(IV), V(V) can be tolerated at an appreciable concentrations. Molar absorptivity and Sandell's sensitivity of the method is 2.80 x 10(5) l mol-1cm-1 and 3.42 x 10(-4) micrograms cm-2, respectively. Beer's law is obeyed in the concentration range of 0.01-0.4 ppm Mo(VI). Aliquots containing 0.2 ppm of Mo(VI) give a mean absorbance of 0.56 with a relative standard deviation of 1.3%.
authors: Universidad Complutense Madrid, Departamento de Quimica Analitica, Facultad Ciencias Quimicas, Ciudad Universitaria, 28040, Madrid, Spain. malik_chem2002@yahoo.co.uk
authors: A K
authors: AK
authors: Malik
authors: Vanita
authors: V
authors: Sharma
authors: Monica
authors: M
authors: Nijhawan
authors: A L J
authors: AL
authors: Rao
mesh_terms: D004785:Environmental Pollutants / Q000032:analysis*; D008982:Molybdenum / Q000032:analysis*; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D013501:Surface-Active Agents; D008982:Molybdenum