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Investigations on adsorption potentiometry: Part 4. Derivative adsorption chronopotentiometry of the bismuth‐2‐(5′‐bromo‐2′‐pyridyeazo)‐5‐diethylaminophenol system
Author(s) -
Jin Wenrui,
Wang Junying
Publication year - 1994
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140061013
Subject(s) - adsorption , bismuth , chemistry , derivative (finance) , inorganic chemistry , analytical chemistry (journal) , chromatography , organic chemistry , financial economics , economics
Derivative adsorption chronopotentiometry of the bismuth complex with 2‐(5′‐bromo‐2′‐pyridylazo‐5‐ diethylaminophenol (5‐Br‐PADAP) has been described. The theory of derivative adsorption chronopotentiometry for the complex system and the method of determination of the composition, the conditional stability constant, as well as the number of electrons transferred by the electroactive complex adsorbed on the surface of the electrode have been discussed. In 0.025 mol/L NaOH, the linear range of the method is 2 × 10 −9 to 1.1 × 10 −7 mol/L for the preconcentration time of 120 seconds. This method has been used to determine the bismuth content in food.