Direct Spectrophotometric Determination of Vanadium(V)Using a Recently Synthesized Hydroxytriazene Derivative

摘要

A new hydroxytriazene(3-hydroxy-3-p-chlorophenyl-1-p-nitrophenyl-triazene)has been prepared.The reagent has been used for spectrophoto-metric determination of vanadium(V).Vanadium forms a 1:1 yellowish green complex with this reagent.The complex shows maximum absorbance at 410 run(lambda_(max))in the pH range of 7-9.Beer's law for determination of vanadium is obeyed in the concentration range of 0.51-3.06 mug mL~(-1).Molar absorptivity and Sandell's sensitivity were found as 7463 L mol~(-1)cm~(-1)and 6.83 ng cm~(-2),respectively.Standard deviation(sigma)using ten determinations was found to be 0.009 mug mL~(-1)for 2.55 mug mL~(-1)of vanadium.