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Method for measuring content of iminodisuccinate in fertilizer

A technology of iminodisuccinate and fertilizer, which is applied in the direction of measuring devices, preparation of test samples, color/spectral characteristic measurement, etc., can solve problems such as instability, pigment fading detection, urea decomposition, etc., and achieve convenient operation and use , less interference factors, good reproducibility

Inactive Publication Date: 2018-12-14
SHANDONG YUANLIAN CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention aims at the problems of urea decomposition, metal ion turbid precipitation and pigment fading caused by the above-mentioned detection process under alkaline conditions, which cause detection instability and the like, and provides a unified acidic system detection method to detect the content of IDS in fertilizers , specifically a method for determining the content of iminodisuccinate in fertilizers

Method used

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  • Method for measuring content of iminodisuccinate in fertilizer
  • Method for measuring content of iminodisuccinate in fertilizer
  • Method for measuring content of iminodisuccinate in fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: detect the content of IDS in IDS urea:

[0038] 1.1 According to relevant information, the IDS contained in the sample to be tested is 5.0‰ (mass ratio, converted to pure IDS-Na4, M=337).

[0039] 1.2 Reagents and materials:

[0040] 1.2.1 Acidic pH adjustment solution: 40mL acetic acid, dilute to 1L;

[0041] 1.2.2 Metal ion standard solution: 0.04mol / L copper sulfate.

[0042] 1.2.3 Blank urea: Compared with 1.1, it does not contain IDS, and the other components are the same.

[0043] 1.3 Preparation of reference solution: In a 50mL beaker, add 10mL of pure water, 10g of 1.2.3 blank urea, and 10mL of 1.2.1 acidic pH adjustment solution. After the urea is completely dissolved, transfer it quantitatively to a 50mL volumetric flask. Add 2mL of 1.2.2 metal ion standard solution to the above-mentioned volumetric flask, and constant volume to obtain a reference solution.

[0044] 1.4 Prepare the solution to be tested:

[0045] Take 10 50mL beakers, add 10mL...

Embodiment 2

[0064] Embodiment 2: detect the content of IDS.2Na.Ca in the compound fertilizer

[0065] 2.1 According to relevant information, the IDS.2Na.Ca contained in the sample to be tested is 9.8‰ (mass ratio, converted to pure IDS.2Na.Ca, M=331).

[0066] 2.2 Reagents and materials:

[0067] 2.2.1 Acidic pH adjustment solution: 40mL acetic acid, dilute to 1L;

[0068] 2.2.2 Metal ion standard solution: 0.04mol / L copper sulfate.

[0069] 2.2.3 Blank compound fertilizer: Compared with 2.1, it does not contain IDS, and the other ingredients are the same.

[0070] 2.3 Preparation of reference solution: In a 50mL beaker, add 10mL of pure water, 5g of 2.2.3 blank compound fertilizer, and 15mL of 2.2.1 acidic pH adjustment solution. After the compound fertilizer is completely dissolved, transfer it quantitatively to a 50mL volumetric flask. Add 2mL of 2.2.2 metal ion standard solution to the above-mentioned volumetric flask, and make it constant to obtain a reference solution.

[0071] ...

Embodiment 3

[0092] Example 3: IDS-containing tartrazine urea labeling and filing.

[0093] 3.1 According to relevant information, the IDS contained in the sample to be tested is 5.0‰ (mass ratio, converted to pure IDS-Na4, M=337), and the contained pigment is 50ppm tartrazine (mass ratio).

[0094] 3.2 Reagents and materials:

[0095] 3.2.1 Acidic pH adjustment solution: 40mL acetic acid, dilute to 1L.

[0096] 3.2.2 Metal ion standard solution: 0.04mol / L copper sulfate.

[0097] 3.2.3 Blank urea: Compared with 1.1, it does not contain IDS, and other ingredients are the same, containing 50ppm tartrazine.

[0098] 3.3 Preparation of reference solution: In a 50mL beaker, add 10mL of pure water, 10g of 3.2.3 blank urea, and 10mL of 3.2.1 acidic pH adjustment solution. After all the urea is dissolved, transfer it quantitatively to a 50mL volumetric flask. Add 2mL of 3.2.2 metal ion standard solution to the above-mentioned volumetric flask, and constant volume to obtain a reference solution...

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Abstract

The invention discloses a method for measuring the content of iminodisuccinate (IDS) in a fertilizer, and belongs to the fields of chemical analysis, product detection, standard filing and the like. The method comprises the following steps of firstly, preparing a reference liquid and a liquid to be measured, and performing detecting to obtain the maximum absorption wavelength; and drawing a working curve, and solving the content of the IDS in a to-be-detected sample according to the working curve. A spectrophotometer is taken as a main device and metal ions are taken as an indicator. When theconcentration of the metal ions is fixed, the absorbance of a chelate is increased along with the increase of the IDS fertilizer; at the inflection point position of the absorbance, the metal ions andthe IDS contained in the fertilizer can exactly generate a 1: 1 chelate; and the content of the IDS in the fertilizer is converted according to the amount of the used metal ions. The detection methodis clear in principle, high in repeatability of detection results, less in interference factors, and brings convenience to various manufacturers and third-party mechanisms for detection and application; and in addition, the method can be extended to detect the content of other chelating synergistic agents (such as EDTA, DTPA and the like) in the fertilizer.

Description

technical field [0001] The invention belongs to the technical field of product content detection, and in particular relates to a method for measuring the content of iminodisuccinate in fertilizers. Background technique [0002] Generally described chelating synergist refers to a plurality of active groups (carboxyl, amino, amido etc.) etc.), promote the absorption and utilization of plants, and play the role of reducing weight, increasing production and increasing efficiency. [0003] However, the chelating synergist is expensive (as high as IDS 30,000 / ton, while urea is only 1,600 yuan / ton), and when it is not applied according to the scientific measurement ratio, there is serious waste, and environmental pollution (such as EDTA is not Degraded, if used in large quantities, will be enriched in the soil, causing environmental pollution), etc. Before applying scientifically, the content of chelating synergist in the chelating synergist fertilizer should be detected first, w...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/28
CPCG01N1/28G01N21/31G01N2001/2893
Inventor 常领山张杰纯朱洪波冯莉华吴朝军刘克印李海平王晓娟
Owner SHANDONG YUANLIAN CHEM CO LTD
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