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Method for simultaneously measuring contents of multiple organic acids in feeder acidulant

A technology of acidifying agent and organic acid, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of detection method error, high toxicity of reagents, detection equipment, and inspection cost limitations, and achieve the effect of high accuracy

Active Publication Date: 2013-01-30
安徽泰格生物技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reagents used to measure formic acid content in this method are highly toxic, and whether the precipitation is complete or not and the loss in the process of precipitation filtration and washing cause relatively large errors in the detection method
The national standard of propionic acid usually uses gas chromatography to measure the content. This method is limited by the detection equipment and inspection cost, and it is difficult to use it in actual production and acceptance.

Method used

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  • Method for simultaneously measuring contents of multiple organic acids in feeder acidulant
  • Method for simultaneously measuring contents of multiple organic acids in feeder acidulant
  • Method for simultaneously measuring contents of multiple organic acids in feeder acidulant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Reagents and solutions

[0020] 1. Ammonium dihydrogen phosphate

[0021] 2. Phosphoric acid

[0022] 3. Standard product of formic acid: purity greater than or equal to 88.0%

[0023] 4. Lactic acid standard product: about 85% purity

[0024] 5. Standard product of citric acid: purity greater than or equal to 99.5%

[0025] 6. Standard product of fumaric acid: purity greater than or equal to 99.0%

[0026] 7. Propionic acid standard product: purity greater than or equal to 99.5%

[0027] 8. Phenolphthalein indicator solution: Take 1 g of phenolphthalein, add 100 mL of 95% ethanol to dissolve it, and obtain it.

[0028] 9. Sodium hydroxide titration solution (1mol / L): prepared and calibrated according to the method specified in Appendix XV F of Part Two of the Chinese Pharmacopoeia 2005 Edition.

[0029] 10. Sulfuric acid titration solution (0.5mol / L): prepared and calibrated according to the method specified in Appendix XV F of Part II of the Chinese Pharmacop...

Embodiment 2

[0102] 1. Reagents and solutions

[0103] 1. Ammonium dihydrogen phosphate

[0104] 2. Phosphoric acid

[0105] 3. Standard product of formic acid: purity greater than or equal to 88.0%

[0106] 4. Lactic acid standard product: about 85% purity

[0107] 5. Standard product of citric acid: purity greater than or equal to 99.5%

[0108] 6. Standard product of fumaric acid: purity greater than or equal to 99.0%

[0109] 7. Propionic acid standard product: purity greater than or equal to 99.5%

[0110] 8. Phenolphthalein indicator solution: Take 1 g of phenolphthalein, add 100 mL of 95% ethanol to dissolve it, and obtain it.

[0111] 9. Sodium hydroxide titration solution (1mol / L): prepared and calibrated according to the method specified in Appendix XV F of Part Two of the Chinese Pharmacopoeia 2005 Edition.

[0112] 10. Sulfuric acid titration solution (0.5mol / L): prepared and calibrated according to the method specified in Appendix XV F of Part II of the Chinese Pharmacop...

Embodiment 3

[0187] 1. Reagents and solutions

[0188] 1. Ammonium dihydrogen phosphate

[0189] 2. Phosphoric acid

[0190] 3. Standard product of formic acid: purity greater than or equal to 88.0%

[0191] 4. Lactic acid standard product: about 85% purity

[0192] 5. Standard product of citric acid: purity greater than or equal to 99.5%

[0193] 6. Standard product of fumaric acid: purity greater than or equal to 99.0%

[0194] 7. Propionic acid standard product: purity greater than or equal to 99.5%

[0195] 8. Phenolphthalein indicator solution: Take 1 g of phenolphthalein, add 100 mL of 95% ethanol to dissolve it, and obtain it.

[0196] 9. Sodium hydroxide titration solution (1mol / L): prepared and calibrated according to the method specified in Appendix XV F of Part Two of the Chinese Pharmacopoeia 2005 Edition.

[0197] 10. Sulfuric acid titration solution (0.5mol / L): prepared and calibrated according to the method specified in Appendix XV F of Part II of the Chinese Pharmacop...

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Abstract

The invention discloses a method for simultaneously measuring contents of multiple organic acids in feeder acidulant. The method comprises the following steps: (1) respectively preparing standard storage stock solutions of formic acid, lactic acid, citric acid, fumaric acid and propanoic acid, and preparing a mixed standard solution by mixing and volume determination; (2) diluting the feeder acidulant specimen to be measured for 500-2,000 times; (3) filtering the diluted specimen solution, injecting 5-20 microlitres of specimen solution into a liquid chromatograph, and recording a chromatomapat the wave length of 210 nm under the condition that the flowing speed of the flowing phase is 0.6-1.0 mL / min; taking the same amount of mixed standard solution to measure by the method, and calculating the contents of the organic acids in the specimen by the peak area through an outer calibration method. The invention can simultaneously obtain content analyzing results of the formic acid, the lactic acid, the citric acid, the fumaric acid and the propanoic acid by using the specimen once under the condition of same chromatogram, and has the advantages of simplicity, convenience and high accuracy.

Description

technical field [0001] The invention relates to a method for simultaneously measuring the contents of multiple organic acids in a feed acidifier. Background technique [0002] Acidifier is a kind of non-nutritive feed additive, which can increase the acidity of feed, inhibit the growth of harmful bacteria, improve the environment of animal digestive tract, and improve the growth performance of animals. Acidifiers mainly include single acidifiers and compound acidifiers, and single acidifiers are divided into organic acids and inorganic acids. The currently used inorganic acidifiers are mainly phosphoric acid; the organic acidifiers mainly include citric acid, fumaric acid (fumaric acid), lactic acid, propionic acid, malic acid, sorbic acid, formic acid, acetic acid and the like. Composite acidifiers are made by compounding two or more single acidifiers in a certain proportion. Due to the troubles of inspection equipment and technology, most users basically do not detect th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 芦光宏陈绍莉魏升平朱森阳
Owner 安徽泰格生物技术股份有限公司
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