Spectrophotometric determination of lead in environmental objects with the new highly effective reagent HOCAC

Uranyl-Selective Electrode Based on a New Bifunctional Derivative Combining the Synergistic Properties of Phosphine Oxide and Ester of Phosphoric Acid

“…12,24 However, either reduction of Fe(III) to Fe(II) or Fe(III) masking by phosphate or ascorbic acid is normally used in industrial processes to avoid its interference. 1,4 In general, removal/masking of these interfering ions would be required for samples rich in these ions. On the other hand, interferences caused by fluoride and dihydrogen phosphate can be related to the stable complexes that these anions could form with the U(VI) metal center in the UO 2 L 2 -based membrane, as one can observe from the high values of the formation constants of the fluoro-and phosphate-uranium complexes.…”

Metals in Sediments

“…Savvin et al 153 have discussed a spectrophotometric method for the determination of lead in nonsaline sediments.…”

Tetradiazo(o-carboxy)phenylcalix[4]arene for Determination of Pb2+Ion

“…[5][6][7][8][9][10][11][12][13][14][15] The chromoionophore is constructed from two functionally different parts: (a) an ionophore part, which recognizes ions and performs functions peculiar to a particular ionophore; and (b) a chromophore part, which transduces chemical information produced by ionophore-ion interaction into an optical signal. Many interesting aspects of complexation of alkali and alkaline earth metal ions and transition metal ions were disclosed by studying the absorption behavior of chromophoric groups.…”