@article { author = {}, title = {EXTRACTIVE-SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM(V) AS AN ION-ASSOCIATION COMPLEX WITH 4-(2-PYRIDYLAZ0)-RESORCINOALN D TETRABUTYLAMMONIUM PERCHLORATE}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {11}, number = {1}, pages = {-}, year = {2000}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {A simple and sensitive extractive- spectrophotometric method for thedeterrnination of trace amounts of vanadium(V) is reported. The method is based on the quantitative extraction of the anion complex of V(V) with 4-(2-pyridy1azo)-resorcinol with tetrabutylammonium perchlorate into chloroform, followed by spectrophotometric measurements at 554 nm. Beer's law is obeyed over the concentration range of 5-350ng m l at 554 nm with a molar absorptivity of 1 . 3 1m ol cm . The relative standard deviation is 1.6% for a 100 ng ml vanadium solution. The interfering effect of various cations and anions was studied. The method was applied to thedeterrnination of vanadium is some synthetic samples}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31299.html}, eprint = {https://jsciences.ut.ac.ir/article_31299_19859099428b23e4f960bf17e38ba5ed.pdf} }