Method for rapidly determining citric soluble phosphorus in feed raw material calcium hydrogen phosphate

A technology of calcium hydrogen phosphate, feed raw materials, applied in the measurement of color/spectral characteristics, analysis by chemical reaction of materials, material analysis by observing the impact on chemical indicators, etc., can solve the problem of inability to meet and adapt quickly and easily and personnel safety requirements, threat detection personnel health, cumbersome operation process, etc., to achieve the effect of convenient and fast detection process, saving detection cost, and simple experimental operation process

Inactive Publication Date: 2019-01-11
ZHANGZHOU AONONG ANIMAL HUSBANDRY TECH +3
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  • Abstract
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AI Technical Summary

Problems solved by technology

The above-mentioned method adopts the quinoline gravimetric method to measure the citrate-soluble phosphorus content, although the method is mature, the method operation process is loaded down with trivial details, time-consuming long (at least 4h), detection cost is high, and the quinoline (C in the quinoline precipitant 9 h 7 N) and acetone (C 3 h 6 O) etc. are dangerous goods, which will threaten the health of testing personnel, because short-term exposure of the human body to quinoline vapor will cause corrosion of the nose, eyes and respiratory tract, and may also cause dizziness and nausea. Acetone is poisonous and belongs to Controlled chemicals, which can be absorbed by the human body through the respiratory tract, digestive tract and skin, and can cause poisoning if exposed to more
Therefore, the above-mentioned detection methods cannot meet and adapt to the requirements of quickness, simplicity and personnel safety in production and scientific research analysis.

Method used

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  • Method for rapidly determining citric soluble phosphorus in feed raw material calcium hydrogen phosphate
  • Method for rapidly determining citric soluble phosphorus in feed raw material calcium hydrogen phosphate
  • Method for rapidly determining citric soluble phosphorus in feed raw material calcium hydrogen phosphate

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Embodiment 1

[0028] A method for rapidly measuring citrate-soluble phosphorus in feed raw material calcium hydrogen phosphate, comprising the following steps:

[0029] 1. Preparation of reagents required for the experiment

[0030] 1.1 Neutral ammonium citrate solution: Dissolve 74.0g of citric acid in 300mL of water, add 69mL of ammonia water, adjust the pH value of the solution to 7.0 with ammonia water under the control of an acidity meter, and measure its relative density with a specific gravity meter to be 1.09 (20°C). Store the solution in a closed bottle for later use (if it is used for a long time, its acidity needs to be corrected before use).

[0031] 1.2 Vanadium ammonium molybdate developer: weigh 1.25g of ammonium metavanadate, add 200mL of water and heat to dissolve, add 250mL of nitric acid after cooling; another weigh 25g of ammonium molybdate, add 400mL of water to dissolve, mix the two solutions after cooling, Dilute to 1000mL with water and store in the dark (if precipi...

Embodiment 2

[0063] A method for rapidly determining citrate-soluble phosphorus in feed raw material calcium hydrogen phosphate, the instruments, equipment and environmental requirements used are as follows:

[0064] 1. Instruments and equipment

[0065] 1.1 Analytical balance (accurate to 0.0001g)

[0066] 1.2 UV-Vis Spectrophotometer (T6 New Century)

[0067] 1.3 Acidity meter: division value is 0.2, equipped with glass electrode and saturated calomel electrode

[0068] 1.4 hydrometer

[0069] 1.5 Electric constant temperature water bath (temperature can be controlled at 65±2°C)

[0070] 1.6 Pipette: 1, 2, 5, 10, 20mL

[0071] 1.7 volumetric flask: 50mL, 250mL

[0072] 1.8 medium speed quantitative filter paper

[0073] 1.9 Beaker: 100mL

[0074] 1.10 Measuring cylinder: 100mL

[0075] 2. Environmental requirements

[0076] 2.1 Temperature: 15-30°C

[0077] 2.2 Relative humidity: 45-80%

[0078] 3. Accuracy experiment

[0079] In order to verify the measurement results of the...

Embodiment 3

[0083] A method for rapidly measuring citrate-soluble phosphorus in feed raw material calcium hydrogen phosphate, comprising the following steps:

[0084] 1) After mixing the calcium hydrogen phosphate sample with 100mL neutral ammonium citrate solution, keep it warm at 63°C for 0.5h, then cool to room temperature, dilute with water and shake well to obtain the sample solution. For every 250mL sample solution Contain 0.3g calcium hydrogen phosphate sample; Filter afterwards, obtain the filtrate to be tested;

[0085] 2) Utilize phosphorus standard solution (potassium dihydrogen phosphate standard solution) to draw phosphorus standard working curve, the drawing process of phosphorus standard working curve is: take different volumes of phosphorus standard solution, add 8mL ammonium vanadium molybdate chromogenic reagent respectively, set with water Make up to 50mL, shake well, let stand for 10min, measure the absorbance of each phosphorus standard solution, take the phosphorus c...

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Abstract

The invention relates to a method for rapidly determining citric soluble phosphorus in a feed raw material, namely calcium hydrogen phosphate. The method comprises the following steps: (1) mixing a calcium hydrogen phosphate sample with a neutral ammonium citrate solution, maintaining the temperature at 63-67 for 0.5-1.5 hours, cooling to the room temperature, fixing the volume with water, uniformly shaking, and filtering, so as to obtain filtrate; and (2) carrying out determination by virtue of a colorimetric method, drawing a phosphorus standard working curve, acquiring the phosphorus content by virtue of the working curve, and calculating, so as to obtain the content of citric soluble phosphorus in the calcium hydrogen phosphate sample. Compared with the prior art, the method has the advantages that the safe and precise determination of citric soluble phosphorus in the feed raw material, namely calcium hydrogen phosphate can be realized within a short time, the operation is simple and convenient, the consumed time is short, the detection efficiency is high, a detection result is relatively stable, the repeatability is good, the errors are small, reference data can be provided for the purchasing and acceptance check of the feed raw material, and the quality safety of a feed is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of detection of chemical components in feed raw materials, and relates to a method for rapidly measuring citrate-soluble phosphorus in calcium hydrogen phosphate feed raw materials. Background technique [0002] Phosphorus is one of the most abundant constant elements in livestock and poultry bodies. It is not only an important part of the bones, teeth and nerve tissues of livestock and poultry, but also participates in the metabolism of carbohydrates, fats and nucleic acids in cells. Acid-base balance plays an important role. As a widely used raw material, calcium hydrogen phosphate is an important source of phosphorus supplementation in livestock and poultry feed, and the citrate-soluble phosphorus is an effective phosphorus that is insoluble in water in calcium hydrogen phosphate and can be effectively absorbed and utilized by livestock and poultry, that is, citrate-soluble phosphorus The content can ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/31
CPCG01N21/31G01N21/78
Inventor 张幻蔡艳玲张仙妹肖俊峰张芳平吴有林黄彪傅心锋仲伟迎李品宁
Owner ZHANGZHOU AONONG ANIMAL HUSBANDRY TECH
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