A kind of method for measuring oxalic acid impurity content in vanadyl sulfate
A technology for the content of oxalic acid and impurities in vanadyl sulfate, which is applied in the direction of chemical analysis by titration, can solve the problems of large errors in measurement results and the inability to accurately measure the content of oxalic acid impurities, and achieve low cost and avoid errors.
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Embodiment 1
[0019] A method for measuring oxalic acid impurity content in vanadyl sulfate, comprising the following steps:
[0020] 0.046g of 99.9% pure V 2 O 5 Dissolved in 98wt% sulfuric acid solution to obtain V 2 O 5 Concentration (C 1 ) is the titration solution of 0.005mol / L;
[0021] Dissolve 3.26 g of vanadyl sulfate in deionized water to obtain a vanadyl sulfate solution with a concentration of V of 1 mol / L;
[0022] The vanadyl sulfate solution was titrated with the above-mentioned titration solution in a potentiometric titrator. The titration temperature was 60°C. During the titration, the vanadyl sulfate solution was stirred at a stirring speed of 100 r / min. When the potential in the potentiometric titrator occurred When it jumps and forms a titration curve, the titration end point is reached, the titration process is stopped, and the volume of titrant (V) consumed by the titration process is recorded at the same time. 1 ) is 0.005L, calculate the content (S) of oxalic a...
Embodiment 2
[0024] A method for measuring oxalic acid impurity content in vanadyl sulfate, comprising the following steps:
[0025] 0.069g of 99.9% pure V 2 O 5 Dissolved in 98wt% sulfuric acid solution to obtain V 2 O 5 Concentration (C 1 ) is the titration solution of 0.0075mol / L;
[0026] Dissolve 4.89 g of vanadyl sulfate in deionized water to obtain a vanadyl sulfate solution with a concentration of V of 1.5 mol / L;
[0027] The vanadyl sulfate solution was titrated with the above titration solution in a potentiometric titrator. The titration temperature was 80 °C. During the titration, the vanadyl sulfate solution was stirred at a stirring speed of 150 r / min. When the potential in the potentiometric titrator occurred When it jumps and forms a titration curve, the titration end point is reached, the titration process is stopped, and the volume of titrant (V) consumed by the titration process is recorded at the same time. 1 ) is 0.005L, calculate the content (S) of oxalic acid in...
Embodiment 3
[0029] A method for measuring oxalic acid impurity content in vanadyl sulfate, comprising the following steps:
[0030] 0.092g of 99.9% pure V 2 O 5 Dissolved in 98wt% sulfuric acid solution to obtain V 2 O 5 Concentration (C 1 ) is the titration solution of 0.01mol / L;
[0031] Get 6.52g of vanadyl sulfate and dissolve it in deionized water to obtain a vanadyl sulfate solution with a concentration of 2mol / L of V;
[0032] The vanadyl sulfate solution was titrated with the above-mentioned titration solution in a potentiometric titrator. The titration temperature was 100 °C. During the titration, the vanadyl sulfate solution was stirred at a stirring speed of 200 r / min. When the potential in the potentiometric titrator occurred When it jumps and forms a titration curve, the titration end point is reached, the titration process is stopped, and the volume of titrant (V) consumed by the titration process is recorded at the same time. 1 ) is 0.005L, calculate the content (S) o...
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