A Chelating Reagent, 2, 3, 4-Trihydroxy Acetophenone Phenylhydrazone(THAPPH) used for Selective and Sensitive Kinetic Spectrophotometric Determination of Thorium(IV) from Ores

作者：Chalapathi P V; Prathima B; Rao Subba Y; Reddy Janardhan K; Ramesh G N; Reddy Venkata Ramona D; Varadareddy A^*

来源：Research Journal of Chemistry and Environment, 2011, 15(2): 579-585.

• Hydrazone
• kinetic spectrophotometry
• thorium(IV) and thorium ore

A complexing agent, 2,3,4-trihydroxyaceto-phenonephenylhydrozone (THAPPH) was prepared and developed a selective and sensitive kinetic direct spectrophotometric method for the determination of thorium(IV) at nano levels. The method sensitivity is calculated in terms of molar absorptivity (3.246x10(5) L mol(-1) cm(-1)) and Sandell's sensitivity (0.0007153 mu g cm(-2)), which explains that the method is more sensitive. The developed method is more precise and accuracy, which is found by standard deviation (0.0018), relative standard deviation (0.55%), absolute error(0.008) and confidence limit(+/- 0.0019). The metal and ligand forms 1:1 (M:L)complex and its stability constant is calculated by Asumu's and Edmonds and Birnbaum's method. This developed method was applied for the determination of thorium(IV) from thorite ore and checked the validity of the method by comparing the obtained results with AAS method.

• 出版日期2011-6