Supercharge Your Innovation With Domain-Expert AI Agents!

Rapid determination method for content of calcium in limestone flour

A rapid determination of calcium content technology, applied in the preparation of test samples, material analysis by observing the impact on chemical indicators, analysis by making materials undergo chemical reactions, etc., can solve the problem of long time-consuming determination and achieve The effect of accurate determination of calcium content and shortened time

Inactive Publication Date: 2013-02-13
SHANDONG AGRICULTURAL UNIVERSITY
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the process of feed production, the determination methods of calcium content in stone powder are mostly carried out according to GB / 6436-2002. Whether it is the potassium permanganate method as an arbitration method or the disodium ethylenediaminetetraacetic acid complexometric titration method, the sample before The processing process is more than 3h, and the measurement takes a long time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rapid determination method for content of calcium in limestone flour
  • Rapid determination method for content of calcium in limestone flour
  • Rapid determination method for content of calcium in limestone flour

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The determination of calcium content in stone powder is carried out as follows:

[0016] (1) Accurately weigh the stone powder sample (m, 0.2~0.5g), add 10 mL of 1:1 hydrochloric acid aqueous solution (V / V), stir well to completely dissolve the stone powder, and let it stand at room temperature for 5 minutes. Transfer this solution completely into a 100mL volumetric flask, dilute it to the 100mL mark with distilled water, and shake it up to become a sample decomposition solution.

[0017] (2) Accurately pipette 10mL of the sample decomposition solution into a 200mL beaker, add 100mL of distilled water, 2 drops of methyl red indicator (1.0gL, 0.1g of methyl red dissolved in 100mL of 95% ethanol), add 1:1 Ammonia solution (V / V) until the solution turns orange, then add 2 more drops to make the solution pink, boil carefully, and slowly heat 10mL of ammonium oxalate solution (42.0gL, 4.2g ammonium oxalate dissolved in 100mL water), while adding While stirring, boil for 5~10min,...

Embodiment 2

[0023] 1. Collect 11 stone powder samples, and measure the calcium content in them by the method described in the examples and the potassium permanganate method in GB / 6436-2002, and compare the differences between the two.

[0024] 2. Test results

[0025] The measurement results show that the calcium content in the stone powder determined by the method of the present invention is less time-consuming than the GB / 6436-2002 potassium permanganate method (Table 1), and the method of the present invention is comparable to the GB / 6436-2002 potassium permanganate method. Compared with the method, the difference of the measurement results is small, and the variation range of 11 samples is 0.03~5.33% (Table 2). The method of the invention reduces the time-consuming measurement significantly, and the result is accurate.

[0026] Table 1 Comparison of the time consumption of the two methods to determine the calcium content in stone powder (h)

[0027]

[0028] Table 2 Comparison of two methods...

Embodiment 3

[0031] 1. Collect 10 pieces of stone powder samples, and measure the calcium content in them by the method described in the examples and the potassium permanganate method in GB / 6436-2002, and compare the differences between the two.

[0032] 2. Test results

[0033] The measurement results show that the calcium content in the stone powder measured by the method of the present invention has a small difference compared with the GB / 6436-2002 method, and the variation range of 10 samples is 0.45~6.52% (Table 3).

[0034] Table 3 Comparison of two methods for determining calcium content in stone powder (%)

[0035]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a rapid determination method for the content of calcium in limestone flour. The rapid determination method comprises the following steps of: dissolving a limestone flour sample with a solution of hydrochloric acid to make the calcium in the limestone flour sample present under an ionic condition in the solution; quantitatively precipitating the calcium in the solution by using ammonium oxalate; and indirectly determining the content of the calcium by titrating a potassium permanganate solution. As a method for rapidly determining the content of the calcium in the limestone flour, the rapid determination method is suitable for accurate determination of the content of the calcium in limestone flour raw materials when livestock and poultry feeds are prepared, and the time required by acquiring results is greatly shortened.

Description

(1) Technical field [0001] The invention relates to a method for rapidly determining the calcium content in stone powder through hydrochloric acid dissolution, and belongs to the technical field of feed. (2) Background technology [0002] Because of its easy availability and low price, stone powder is a commonly used raw material for supplementing calcium in the preparation of livestock and poultry feed. In production, the quality of stone powder (especially the content of calcium) is also different due to different production areas and processing techniques. Therefore, it needs to be measured during the feed compounding process to accurately understand its calcium content in order to accurately add the feed. . At present, in the process of feed production, most of the methods for determining calcium content in stone powder are based on GB / 6436-2002, whether it is the potassium permanganate method as the arbitration method or the disodium ethylenediaminetetraacetic acid complexo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N1/38
Inventor 林海焦洪超赵梅宋志刚
Owner SHANDONG AGRICULTURAL UNIVERSITY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com