Method for determining strontium calcium barium in strontium carbonate
A measurement method, the technology of strontium carbonate, is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the problems of many influencing factors, cumbersome operation, and time-consuming operation. , to achieve accurate results, shorten the operation steps, and reduce the measurement time
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Embodiment 1
[0054] Embodiment 1 A kind of assay method of strontium calcium barium in strontium carbonate comprises the following steps:
[0055] (1) Prepare ammonia-ammonium chloride buffer solution: add 40.5 grams of ammonium chloride to 1L, 1mol / L ammonia water to make the pH value 9.4±0.1 to obtain ammonia-ammonium chloride buffer solution.
[0056] (2) Prepare and calibrate 0.02mol / L EDTA standard solution: dissolve 7.4g EDTA in water at 60-100°C, dilute to 1L with water after cooling, and shake well to obtain EDTA solution; absorb 20mL and prepare 0.02mol / L zinc standard solution is placed in the Erlenmeyer flask, add 10mL of ammonia-ammonium chloride buffer with a pH value of 10 prepared by conventional methods, 4-5 drops of 0.2% mass concentration as chrome black T indicator, and use EDTA The solution was titrated until the solution turned green as the end point, and a 0.02mol / L EDTA standard solution was obtained.
[0057] (3) Preparation of 0.1% PAN indicator solution: 0.1 g o...
Embodiment 2
[0091] Embodiment 2 A kind of assay method of strontium calcium barium in strontium carbonate, comprises the following steps:
[0092] (1) Prepare ammonia-ammonium chloride buffer solution with embodiment 1.
[0093] (2) Prepare and demarcate 0.02mol / L EDTA standard solution with embodiment 1.
[0094] (3) Preparation of 0.1% PAN indicator solution is the same as in Example 1.
[0095] (4) prepare 0.02mol / L copper standard solution with embodiment 1.
[0096] (5) Preparation of acetic acid-sodium acetate buffer solution is the same as in Example 1.
[0097] (6) Preparation and calibration of potassium permanganate standard solution are the same as in Example 1.
[0098] (7) Prepare and calibrate 0.01mol / L sodium thiosulfate standard solution according to conventional methods;
[0099] (8) Sample dissolution is the same as in Example 1.
[0100] (9) Capacity analysis:
[0101] ① The analysis and content calculation of strontium are the same as in Example 1.
[0102] ②Cal...
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