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Method for rapidly detecting content of Fe ions in calcium carbonate

A technology of ion content and calcium carbonate, applied in the field of analysis and detection, can solve the problems of high cost and dependence on equipment, and achieve the effect of low cost, few interference factors and strong universality

Inactive Publication Date: 2021-04-27
浙江中财管道科技股份有限公司
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Problems solved by technology

[0004] The present invention provides a method for rapidly detecting the content of Fe ions in calcium carbonate with low cost and visualized results in order to overcome the problems that the traditional determination method of Fe ion content in calcium carbonate relies on equipment and high cost

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  • Method for rapidly detecting content of Fe ions in calcium carbonate
  • Method for rapidly detecting content of Fe ions in calcium carbonate
  • Method for rapidly detecting content of Fe ions in calcium carbonate

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Embodiment 1

[0040] (1) Take 5g of dibenzoylmethane (DBM, Dibenzoyl Methane), prepare a saturated solution with analytical pure absolute ethanol, leave it for 2 hours to obtain a saturated solution of dibenzoylmethane in ethanol, and set it aside;

[0041] (2) Prepare 1+2 concentration nitric acid reagent 100ml: the volume ratio of concentrated nitric acid and distilled water is 1:2;

[0042] (3) Purchase iron standard solutions with different concentrations: 2 μg / ml, 3 μg / ml, 4 μg / ml, 5 μg / ml, 6 μg / ml;

[0043] (4) Weigh 1g (accurate to 0.0002g) calcium carbonate sample with an analytical balance and put it into a 250ml Erlenmeyer flask, (live calcium is first moistened with 5ml absolute ethanol), add 5ml 1+2 concentration nitric acid reagent solution to decompose, After the decomposition is complete, use a 100ml volumetric flask to make up the volume (you can choose whether to filter or not according to the needs before the volume up, if you need to filter, transfer all the filtrate and ...

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Abstract

The invention belongs to the technical field of analysis and detection and relates to a method for quickly detecting the content of Fe ions in calcium carbonate. The method comprises the following steps of: (1) accurately weighing a calcium carbonate sample to be detected, adding a nitric acid solution to decompose the sample, adding water, and fixing the volume by using a volumetric flask to obtain a sample solution; (2) preparing iron standard solutions with different concentrations to obtain reference samples; and (3) adding an ethanol saturated solution of dibenzoylmethane into the sample solution and the iron standard solutions, comparing the colors of the sample solution and each reference sample, semi-quantitatively judging the Fe ion concentration in the sample solution according to the colors, and converting the Fe ion concentration into the Fe ion content in the calcium carbonate sample to be detected. According to the method, specific instruments and equipment are not needed, the cost is low; the universality of the method is high; the operation is simple and efficient; interference factors are few; a result is visual; and rapid semi-quantitative detection of the content of the Fe ions in the calcium carbonate can be achieved.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a method for rapidly detecting Fe ion content in calcium carbonate. Background technique [0002] Calcium carbonate is widely used in my country's industrial production, and its quality detection is related to the performance of the final product. At present, in the national standard analysis method of Fe ion content in calcium carbonate, a spectrophotometer is used for detection and analysis, and the detection cost is relatively high. It is difficult for manufacturers without equipment to detect and quantify. [0003] Chinese patent literature discloses "a method for high-precision detection of phosphorus and iron content in iron phosphate", and its application publication number is CN 103528973A. This invention can detect both Fe and P using an instrument (spectrophotometer). The detection method of this kind of element content is relatively simple to operate, a...

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Application Information

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IPC IPC(8): G01N21/78G01N1/38
CPCG01N21/78G01N1/38
Inventor 周兰英丁良玉王百提张礼涛
Owner 浙江中财管道科技股份有限公司
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