Method for determining concentration of phosphite by cyclic voltammetry
A technology of cyclic voltammetry and phosphite, applied in the direction of electrochemical variables of materials, can solve problems such as long time, and achieve the effect of simple experimental conditions
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[0023] The method for determining the concentration of phosphite by cyclic voltammetry:
[0024] (1) Configure sulfuric acid solutions (5g / L, 10g / L, 15g / L, 20g / L, 25g / L, 30g / L) containing different concentrations of sodium phosphite as standard solutions, and the concentration of sulfuric acid is 0.5mol / L ;
[0025] (2) Utilize the electrochemical workstation to measure the prepared standard solution, the measurement conditions are: the working electrode is a Pt electrode, the auxiliary electrode is a platinum wire, the reference electrode is a saturated calomel electrode, the scanning speed is 500mV / s, and the scanning voltage range is -0.2V~1.2V, scan forward, draw the relationship between the logarithm of the oxidation peak of the phosphite electrode and the logarithm of its concentration (ln I~ln C), establish the working curve, and obtain the linear fitting formula ln I=1.72438+ 0.58806 ln C;
[0026] (3) Dissolve the sample to be tested or its diluted sample in sulfuri...
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