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Method for rapidly determining content of cyclopropylamine

A technology for rapid determination of cyclopropylamine, applied in chemical analysis by titration, etc., can solve the problems of expensive instruments, achieve high accuracy, stable detection data, and simple operation

Inactive Publication Date: 2019-01-01
DAFENG YUELONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, the instruments used in ion chromatography, gas chromatography and high performance liquid chromatography are relatively expensive.

Method used

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  • Method for rapidly determining content of cyclopropylamine
  • Method for rapidly determining content of cyclopropylamine
  • Method for rapidly determining content of cyclopropylamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Accurately weigh 2.5541g of sample A into a 250mL volumetric flask containing 50mL of water, add distilled water to dilute to the mark, shake well, pipette 10mL of the solution into a 250mL conical flask, and add 50mL of the solution to the conical flask Pure water and 2-3 drops of cresol red-bromocresol green mixed indicator, titrate with 0.1056mol / L hydrochloric acid standard solution until the solution is grass green as the end point. Consumption of hydrochloric acid standard solution 16.90mL, cyclopropylamine content of 99.57%.

[0028] The content of cyclopropylamine in sample A was determined in parallel six times, and the relative standard deviation was 0.32%.

[0029] Table 1 is the recovery rate of the cyclopropylamine content assay method in the sample A.

[0030] Measurement amount of sample (g)

Embodiment 2

[0032] Accurately weigh 2.4874g of sample B into a 250mL volumetric flask with 50mL of water inside, add distilled water to dilute to the mark, shake well, pipette 10mL of the solution into a 250mL conical flask, and add 50ml of the solution to the conical flask Pure water and 2-3 drops of cresol red-bromocresol green mixed indicator, titrate with 0.1056mol / L hydrochloric acid standard solution until the solution is grass green as the end point. Consumption of hydrochloric acid standard solution 15.50ml, the content is 93.77%.

[0033] The content of cyclopropylamine in sample B was determined in parallel six times, and the relative standard deviation was 0.26%.

[0034] Table 2 is the recovery rate of the cyclopropylamine content determination method in the sample B.

[0035] Measurement amount of sample (g)

[0036] The above two experiments show that the accuracy and precision of the method are relatively high.

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Abstract

The invention provides a method for rapidly determining the content of cyclopropylamine. The method comprises the following steps: accurately measuring 2.5 g of test sample, placing the measured testsample into a 250 mL volumetric flask with 50 ml of water, adding distilled water, diluting to a scale line, uniformly shaking, transferring 10 mL of the solution into a 250 mL conical bottle, adding50 mL of pure water and 2 to 3 droplets of cresol red-bromocresol green mixed indicator into the conical bottle, and titrating to the end point until the solution is grass green by using 0.1 mol / L hydrochloric acid standard solution; and then calculating the amount of the cyclopropylamine. The method is simple in operation, and capable of rapidly detecting the content of the cyclopropylamine; andthe detection data is relatively stable, and an analysis result is high in accuracy. By adopting the method, no expensive instrument is needed, and the detection cost is relatively low.

Description

technical field [0001] The invention belongs to a method for determining the content of cyclopropylamine, and more specifically relates to a method for rapidly determining the content of cyclopropylamine. Background technique [0002] At present, conventional methods for the determination of amine compounds include spectrophotometry, ion chromatography, gas chromatography, and high performance liquid chromatography. There are many interference factors in spectrophotometry, the reproducibility of the results is poor, and the operation is complicated. Gas chromatography detects that for cyclopropylamine with high moisture content, the content of cyclopropylamine calculated by the area normalization method is relatively high. The volatility of cyclopropylamine is very strong, and the error of the content of cyclopropylamine detected by gas chromatography external standard method is relatively large. Generally speaking, the instruments used in ion chromatography, gas chromatog...

Claims

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Application Information

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IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 杨小燕何福春江以桦李逸超李艳军
Owner DAFENG YUELONG CHEM
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