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Method for detecting total free amine/ammonia in feed additive

A feed additive and detection method technology, applied in the field of detection of total free amine/ammonia in feed additives, can solve problems such as toxicity, economic loss of animal husbandry, cumbersome detection process, etc., and achieve low cost, good commercial prospects, and simple operation Effect

Inactive Publication Date: 2018-02-23
山东祥维斯生物科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And these amines all have stronger toxicity, if be added in the feed, will cause inestimable economic loss to animal husbandry, therefore, must detect the content of monomethylamine, dimethylamine and trimethylamine in the choline chloride product
The state stipulates that the content of total free amine / ammonia in choline chloride products must be less than 0.1%, but the existing detection process is relatively cumbersome

Method used

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  • Method for detecting total free amine/ammonia in feed additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1 proposes a kind of detection method of total free amine / ammonia in feed additive, comprises the steps:

[0060] (1) First add 3 drops of indicator to the absorption bottle, and then after the installation is completed according to the requirements of the azotometer, turn on the cooling water faucet, and then start the instrument to complete the blank distillation. The distillation conditions of the azotometer are: first add 60mL of boric acid with a mass fraction of 2%, then add 40mL of distilled water, then add 50mL of sodium hydroxide with a mass fraction of 40%, and then distill for 480s. The indicator is an ethanol solution of methyl red with a mass fraction of 0.1% and an ethanol solution of bromocresol green with a mass fraction of 0.5% mixed in equal volumes.

[0061](2) Titrate the absorption liquid in the absorption bottle with hydrochloric acid standard solution until the absorption liquid changes from blue-green to purple-red to obtain the volume...

Embodiment 2

[0065] Embodiment 2 proposes the detection method of total free amine / ammonia in a kind of feed additive, comprises the steps:

[0066] (1) First add 5 drops of indicator to the absorption bottle, and then after the installation is completed according to the requirements of the azotometer, turn on the cooling water tap, and then start the instrument to complete the blank distillation. The distillation conditions of the azotometer are: first add 40mL of boric acid with a mass fraction of 2%, then add 60mL of distilled water, then add 30mL of sodium hydroxide with a mass fraction of 40%, and then distill for 480s. The indicator is an ethanol solution of methyl red with a mass fraction of 0.1% and an ethanol solution of bromocresol green with a mass fraction of 0.5% mixed in equal volumes.

[0067] (2) Titrate the absorption liquid in the absorption bottle with hydrochloric acid standard solution until the absorption liquid changes from blue-green to purple-red to obtain the volu...

Embodiment 3

[0071] Embodiment 3 proposes the detection method of total free amine / ammonia in a kind of feed additive, comprises the steps:

[0072] (1) First add 4 drops of indicator to the absorption bottle, and then after the installation is completed according to the requirements of the azotometer, turn on the cooling water tap, and then start the instrument to complete the blank distillation. The distillation conditions of the azotometer are: first add 50mL of boric acid with a mass fraction of 2%, then add 50mL of distilled water, then add 40mL of sodium hydroxide with a mass fraction of 40%, and then distill for 480s. The indicator is an ethanol solution of methyl red with a mass fraction of 0.1% and an ethanol solution of bromocresol green with a mass fraction of 0.5% mixed in equal volumes.

[0073] (2) Titrate the absorption liquid in the absorption bottle with hydrochloric acid standard solution until the absorption liquid changes from blue-green to purple-red to obtain the volu...

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Abstract

The invention relates to a method for detecting the total free amine / ammonia in a feed additive. The method comprises adding an indicator into an absorption bottle, then carrying out installation according to the requirement of the nitrogen fixing instrument, opening a cooling faucet, starting an instrument to finish blank distillation, carrying out titration on an absorption liquid in the absorption bottle through a hydrochloric acid standard solution until the absorption liquid color is changed, acquiring the volume of the consumed hydrochloric acid, weighing 10-20g of a sample to be detected, putting the sample to be detected into a digestion tube, adding an indicator into the absorption bottle, carrying out distillation on the sample to be detected, carrying out titration on the absorption liquid in the absorption bottle through a hydrochloric acid standard solution until the absorption liquid color is changed and acquiring the volume of the consumed hydrochloric acid. The method is easy to operate, realizes a low cost, can accurately detect the total free amine / ammonia content of feed additives such as betaine, betaine hydrochloride and choline chloride and has a good commercial prospect.

Description

technical field [0001] The invention relates to a method for detecting total free amine / ammonia in feed additives. Background technique [0002] Choline is one of the essential vitamins in the growth and development of animals, and it is often added in the form of choline chloride in feed. Trimethylamine is one of the important raw materials for industrial production of choline chloride, which inevitably contains monomethylamine and dimethylamine impurities. Therefore, a certain concentration of amine must remain in the choline chloride product. And these amines all have stronger toxicity, if be added in the feed, will cause inestimable economic loss to animal husbandry, therefore, must detect the content of monomethylamine, dimethylamine and trimethylamine in the choline chloride product . The state stipulates that the content of total free amine / ammonia in choline chloride products must be less than 0.1%, but the existing detection process is relatively cumbersome. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 马琳曾美玉孟东霞
Owner 山东祥维斯生物科技股份有限公司
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