[Spectrophotometric determination of vanadium(V) through the formation of a tungstovanadophosphate-TMBPS charge transfer complex].
A new spectrophotometric method was developed for the determination of vanadium(V). The method was based on the formation of tungstovanadophosphate-3,3',5,5'-tetramethylbenzidine-N-propanesulfonic (TMBPS) charge transfer complex. The spectrophotometric measurements were directly carried out at 450 nm and the apparent molar absorptivity was 2.74 x 10(4) L.mol-1cm-1. The linear range of the determination was 0.02-1 microgram.mL-1. The sensitivity was enhancement with a flotation-extraction preconcentration method and the apparent molar absorptivity was 3.10 x 10(5) L.mol-1cm-1.
Di
Jun-wei
JW
Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, China.
Tu
Yi-feng
YF
Wu
Ying
Y
Liu
De-qi
DQ
D017738:Alkanesulfonic Acids / Q000737:chemistry; D001560:Benzidines / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D004583:Electrons; D004784:Environmental Monitoring; D010710:Phosphates / Q000737:chemistry; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods*; D017973:Tungsten Compounds / Q000737:chemistry; D014638:Vanadates / Q000737:chemistry; D014639:Vanadium / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis
D017738:Alkanesulfonic Acids; D001560:Benzidines; D002614:Chelating Agents; D010710:Phosphates; D017973:Tungsten Compounds; D014874:Water Pollutants, Chemical; D014639:Vanadium; C068559:propylsulfonic acid; C021758:3,3',5,5'-tetramethylbenzidine; D014638:Vanadates