A method for determining chloride ion content in industrial lanthanum oxide by potentiometric titration
A technology of chloride ion content and potentiometric titration, which is applied in the direction of chemical analysis by titration, chemical method analysis, measuring devices, etc., can solve the problems of not considering the stability of chloride ions, complex operation of the test process, and long detection cycle. Achieve the effects of high measurement accuracy, improved detection accuracy, and less dosage
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Embodiment 1
[0055](1) Drying: Burn the industrial lanthanum oxide sample at 800°C for 2 hours to constant weight, place it in a drying dish, and cool it to room temperature to obtain dry lanthanum oxide;
[0056] (2) Sample wetting: Mix the dry lanthanum oxide evenly, take 1.0000g of it and place it in a beaker using the shrinkage method to obtain the industrial lanthanum oxide to be tested. The mass of the industrial lanthanum oxide to be tested is recorded as m ; 3mL ethanol solution (volume concentration is 99.5%) added dropwise to fully wet the industrial lanthanum oxide to be tested, cover with a watch glass, and cool to room temperature;
[0057] (3) Sample dissolution: slowly add 5 mL of nitric acid solution (concentration: 35 wt%) into the beaker, shake the beaker to fully react the industrial lanthanum oxide to be tested with the nitric acid solution until it dissolves completely, then add 2 mL of nitric acid solution (concentration: 35 wt%) wt%), cooled to room temperature to ob...
Embodiment 2
[0089] (1) Drying: Burn the industrial lanthanum oxide sample at 1000°C for 1 hour to constant weight, place it in a drying dish, and cool it to room temperature to obtain dry lanthanum oxide;
[0090] (2) Sample wetting: Mix the dry lanthanum oxide evenly, take 2.0000g and place it in a beaker by the shrinkage method to obtain the industrial lanthanum oxide to be tested. The mass of the industrial lanthanum oxide to be tested is recorded as m ; Add 5mL of ethanol solution (volume concentration is 99.5%) to make the industrial lanthanum oxide to be tested fully wetted, cover with a watch glass, and cool to room temperature;
[0091] (3) Sample dissolution: slowly add 10 mL of nitric acid solution (concentration: 35 wt%) into the beaker, shake the beaker to fully react the industrial lanthanum oxide to be tested with the nitric acid solution until it dissolves completely, then add 5 mL of nitric acid solution (concentration: 35 wt%) wt%), cooled to room temperature to obtain a ...
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