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

Inactive Publication Date: 2012-04-18
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] These methods have their own advantages and disadvantages, the gravimetric method is more accurate, but the operation is time-consuming
As a standard in the chemical industry, the volumetric method is a method with a wide range of applications, but it

Method used

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  • Method for determining strontium calcium barium in strontium carbonate
  • Method for determining strontium calcium barium in strontium carbonate
  • Method for determining strontium calcium barium in strontium carbonate

Examples

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Comparison scheme
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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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Abstract

The invention relates to a method for determining strontium calcium barium in strontium carbonate. The method comprises the following steps: (1) preparing an ammonia-ammonium chloride buffer solution; (2) preparing and calibrating a 0.02mol / L EDTA standard solution; (3) preparing a 0.1% PAN indicator solution; (4) preparing a 0.02mol / L copper standard solution; (5) preparing an acetate-sodiumacetate buffer solution; (6) preparing and calibrating a potassium permanganate standard liquid; (7) preparing and calibrating a 0.01 mol / L sodium hyposulfite standard solution according to a routine method; (8) dissolving a sample, carrying out a dry filtering and collecting a filtrate; (9) carrying out capacity analysis of a. analysis and content calculation on strontium, b. analysis and content calculation on calcium, and c. analysis and content calculation on barium. The determination method of the invention is simply operated, has an obvious titration end, reduces time for determining strontium calcium barium in strontium carbonate and increases determination accuracy.

Description

technical field [0001] The invention relates to the technical field of inorganic materials, in particular to a method for determining strontium calcium barium in strontium carbonate. Background technique [0002] Strontium carbonate is an important strontium salt, which is widely used in the fields of magnetic materials, medicine and chemical preparations, pigments, coatings, ceramics, electrolytic zinc, pyrotechnics and various types of displays. The quality inspection of strontium carbonate products in various enterprises is mainly based on the analysis of chemical industry standards. Industrial strontium carbonate generally contains the three elements of strontium, calcium and barium at the same time. Both strontium, calcium and barium are alkaline earth metal elements with similar properties. There is mutual interference in the determination, and it is not easy to separate. The analysis method is not yet perfect. Common analytical methods for these three elements includ...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 王舒娅王树轩祁米香杨占寿邹兴武
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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