Kinetics and Mechanism of Oxidation of L-Histidine by Hexachloroiridate(IV) in Sodium Acetate-Acetic Acid Buffer Medium

2020 ◽  
Vol 9 (1) ◽  
2003 ◽  
Vol 150 (9) ◽  
pp. B445 ◽  
Author(s):  
Marc Vankeerberghen ◽  
Mohammed Abdulsalam ◽  
Howard Pickering ◽  
Johan Deconinck

1966 ◽  
Vol 49 (5) ◽  
pp. 895-898
Author(s):  
Loyal R Stone

Abstract Methods are presented in which diethylstilbestrol is extracted from feeds in the Goldfisch apparatus, transferred into alkaline sodium acetate solution to avoid emulsions, and measured colorimetrically in a sodium acetate-acetic acid buffer system. The procedure is rapid, and results agree closely with those obtained by the official method. Procedures are also presented for determination of diethylstilbestrol in molasses and fat mixtures.


1975 ◽  
Vol 21 (2) ◽  
pp. 255-257 ◽  
Author(s):  
Jack H Ladenson ◽  
C Elliott Bell

Abstract Measurement with combination pH electrodes of the pH of the dilute buffers used in a commercial kit (CEA-Roche) for assay of carcinoembryonic antigen resulted in pH values 0.1 to 0.3 unit lower than pH values measured on an electrode system with a capillary junction. If the pH values of these buffers were adjusted, based on such measurements, an error in the assay of 0.2 to 0.6 ng/ml in the 1.5-3.0 ng/ml range would result. We recommend that the pH of dialyzed samples and of the working ethylenediaminetetraacetate and ammonium acetate-acetic acid buffers be monitored with pH electrodes that have a capillary junction between sample and saturated KCl, as is true of most blood-pH instruments. We also recommend use of a 1 mol/liter rather than 2.5 mol/liter stock ammonium acetate-acetic acid buffer, because of the closer similarity of the pH of buffers at this molarity to those at 0.01 mol/liter.


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