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Method for detecting dicyandiamide content of cyanamide solution by HPLC (High Performance Liquid Chromatography)

A technology of dicyandiamide and cyanamide, applied in the field of detecting the content of dicyandiamide in cyanamide solution by using HPLC method, can solve the problems of long time consumption, time-consuming, large human error, etc., reduce analysis time, and the method is simple and easy OK, high-accuracy effect

Active Publication Date: 2019-12-27
固安君德同创生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although chemical analysis and potentiometric titration are relatively simple, they take a long time and have large human errors. Mass spectrometers are expensive and are rarely equipped in general laboratories.
In addition, it has been reported in the literature that the detection method of dicyandiamide is to concentrate, extract the sample and then use high-performance liquid chromatography to detect. This method is time-consuming and expensive.

Method used

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  • Method for detecting dicyandiamide content of cyanamide solution by HPLC (High Performance Liquid Chromatography)
  • Method for detecting dicyandiamide content of cyanamide solution by HPLC (High Performance Liquid Chromatography)
  • Method for detecting dicyandiamide content of cyanamide solution by HPLC (High Performance Liquid Chromatography)

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] There is currently a batch of 100 kg of cyanamide solutions with 30% cyanamide content and <5% dicyandiamide content, and the concentration of dicyandiamide in it needs to be tested.

[0032] The high performance liquid chromatographic conditions adopted are: the chromatographic column is Dionex IonPac TM CS16 cation exchange column with a column length of 250 mm and a column inner diameter of 5 μm; the detector is a variable wavelength ultraviolet absorption detector with a detection wavelength of 205 nm; the column temperature is 35°C; the mobile phase is 18 mmol methanesulfonic acid aqueous solution; The flow rate was 1.0 mL / min; the injection volume was 10 μL.

[0033] A kind of method utilizing HPLC method to detect the content of dicyandiamide in cyanamide solution, adopt high-performance liquid chromatograph to detect, external standard method quantitative analysis, specifically comprise the following steps of carrying out successively:

[0034] (1) Prepare dic...

Embodiment 2

[0055] There is currently a batch of 100 kg of cyanamide solutions with 30% cyanamide content and <5% dicyandiamide content, and the concentration of dicyandiamide in it needs to be tested.

[0056] The high performance liquid chromatographic conditions adopted are: the chromatographic column is Dionex IonPac TM CS16 cation exchange column with a column length of 250 mm and a column inner diameter of 5 μm; the detector is a variable wavelength ultraviolet absorption detector with a detection wavelength of 205 nm; the column temperature is 35°C; the mobile phase is 18 mmol methanesulfonic acid aqueous solution; The flow rate was 1.0 mL / min; the injection volume was 10 μL.

[0057] A kind of method utilizing HPLC method to detect the content of dicyandiamide in cyanamide solution, adopt high-performance liquid chromatograph to detect, external standard method quantitative analysis, specifically comprise the following steps of carrying out successively:

[0058] (1) Prepare dic...

Embodiment 3

[0079] There is currently a batch of 100 kg of cyanamide solutions with 30% cyanamide content and <5% dicyandiamide content, and the concentration of dicyandiamide in it needs to be tested.

[0080] The high performance liquid chromatographic conditions adopted are: the chromatographic column is Dionex IonPac TM CS16 cation exchange column with a column length of 250 mm and a column inner diameter of 5 μm; the detector is a variable wavelength ultraviolet absorption detector with a detection wavelength of 205 nm; the column temperature is 35°C; the mobile phase is 18 mmol methanesulfonic acid aqueous solution; The flow rate was 1.0 mL / min; the injection volume was 10 μL.

[0081] A kind of method utilizing HPLC method to detect the content of dicyandiamide in cyanamide solution, adopt high-performance liquid chromatograph to detect, external standard method quantitative analysis, specifically comprise the following steps of carrying out successively:

[0082] (1) Prepare dic...

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Abstract

The invention discloses a method for detecting the dicyandiamide content of a cyanamide solution by HPLC (High Performance Liquid Chromatography). The method comprises the following steps in sequence:(1) preparing a standard solution; (2) detecting the standard solution, and drawing a standard curve; and (3) determining a sample solution, and calculating the sample content. The method is high inprecision, high in accuracy and high in repeatability, can realize direct detection of a sample, greatly reduces the analysis time, and is simple, feasible, convenient and reliable.

Description

technical field [0001] The invention belongs to the technical field of analysis, and relates to a quantitative analysis method for dicyandiamide in a cyanamide solution, in particular to a method for detecting the content of dicyandiamide in a cyanamide solution by using an HPLC method. Background technique [0002] Cyanamide (Cyanamide, CN 2 h 2 ) usually exists in the form of aqueous solution, pure cyanamide is a crystal, rhomboid, colorless, deliquescent, melting point is 46 ℃. Cyanamide has high solubility in water and is weakly alkaline, and it is completely miscible with water at 43°C. Cyanamide is very polar, and contains cyano and amino groups, which are active groups, and are prone to reactions such as addition, substitution, and condensation. When it encounters alkali, it decomposes to form dicyandiamide and polymers, and when it encounters acid, it decomposes into urea. Decompose at 180°C. [0003] Dicyandiamide, also known as dicyandiamide (Dicyandiamide, Cya...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/884
Inventor 杨立彬沈承琪刘伟国
Owner 固安君德同创生物工程有限公司
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