Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting azithromycin capsule related impurities

A technology of azithromycin and detection method, applied in the field of analytical chemistry, can solve the problems such as the increase of the organic phase ratio, the fluctuation of the column pressure and the enlargement

Pending Publication Date: 2020-04-17
HUBEI HONGYUAN PHARMA +1
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detection method for azithromycin-related impurities recorded in the European Pharmacopoeia (EP9.0) uses a gradient operation. During the test, the proportion of the organic phase gradually increases, and the column pressure fluctuates gradually when it is mixed with the buffer salt concentration. Drift is easy to occur. Since there are many impurities in azithromycin, the peak time drift will cause errors in the judgment of impurities.
Therefore, there is an urgent need for a detection method that can solve the problem that the column pressure fluctuation gradually increases during the analysis and test operation, and can avoid the error in the judgment of impurities caused by the drift of the peak time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for detecting azithromycin capsule related impurities
  • Method for detecting azithromycin capsule related impurities
  • Method for detecting azithromycin capsule related impurities

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0112] The instrument and chromatographic conditions adopted are as follows:

[0113] High performance liquid chromatography: Waters 2695+2998;

[0114] Chromatographic column: Waters XTerra MS C18 column (4.6mm×250mm, 5μm);

[0115] Mobile phase A: methanol-acetonitrile (1:3);

[0116] Mobile phase B: 1.74g / L (0.01mol / L) anhydrous dipotassium hydrogen phosphate solution (use phosphoric acid with a volume ratio of 10%, or potassium hydroxide solution with a mass volume ratio of 10%, to adjust the pH to 8.9);

[0117] Perform gradient elution as shown in Table 3 of the mobile phase;

[0118] Table 3 Example 2 gradient elution table

[0119]

[0120] Detection wavelength: 210nm;

[0121] Column temperature: 60°C;

[0122] Flow rate: 1.0ml / min;

[0123] Injection volume: 50μL;

[0124] Diluent: ammonium dihydrogen phosphate solution (weigh 1.73g of ammonium dihydrogen phosphate, add water to dissolve and dilute to 1000ml, use ammonia test solution to adjust the pH value...

Embodiment 3

[0134] The instrument and chromatographic conditions adopted are as follows:

[0135] High performance liquid chromatography: Shimadzu LC-16PDA;

[0136] Chromatographic column: Waters XTerra MS C18 column (4.6mm×250mm, 5μm)

[0137] Mobile phase A: methanol-acetonitrile (1:3);

[0138] Mobile phase B: 1.74g / L (0.01mol / L) anhydrous dipotassium hydrogen phosphate solution (use phosphoric acid with a volume ratio of 10%, or potassium hydroxide solution with a mass volume ratio of 10%, to adjust the pH to 8.9);

[0139] The mobile phase carries out gradient elution as shown in Table 5;

[0140] Table 5 Example 3 gradient elution table

[0141]

[0142] Detection wavelength: 210nm;

[0143] Column temperature: 60°C;

[0144] Flow rate: 1.0ml / min;

[0145] Injection volume: 50μL;

[0146] Diluent: ammonium dihydrogen phosphate solution (weigh 1.73g of ammonium dihydrogen phosphate, add water to dissolve and dilute to 1000ml, use ammonia test solution to adjust the pH valu...

Embodiment 4

[0156] The instrument and chromatographic conditions adopted are as follows:

[0157] High performance liquid chromatography: Shimadzu LC-16PDA;

[0158] Chromatographic column: Waters XTerra MS C18 column (4.6mm×250mm, 5μm);

[0159] Mobile phase A: methanol-acetonitrile (1:3);

[0160] Mobile phase B: 0.005mol / L anhydrous dipotassium hydrogen phosphate solution (use phosphoric acid with a volume ratio of 10%, or potassium hydroxide solution with a mass volume ratio of 10%, to adjust the pH to 8.9);

[0161] The mobile phase carries out gradient elution as shown in Table 7;

[0162] Table 7 Example 4 gradient elution table

[0163]

[0164]

[0165] Detection wavelength: 210nm;

[0166] Column temperature: 60°C;

[0167] Flow rate: 1.0ml / min;

[0168] Injection volume: 50μL;

[0169] Diluent: ammonium dihydrogen phosphate solution (weigh 1.73g of ammonium dihydrogen phosphate, add water to dissolve and dilute to 1000ml, use ammonia test solution to adjust the pH ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for detecting azithromycin capsule related impurities . A mobile phase for separating the azithromycin related impurities is as follows: a mobile phase A, namely a 0.003 mol / L dipotassium phosphate buffer salt solution; a mobile phase B, namely methanol-acetonitrile (250: 750), and elution detection is carried out by adopting a linear gradient elution method. According to the invention, the azithromycin related impurities can be completely separated, fluctuation of column pressure during detection of the azithromycin capsule related impurities is reduced, the service life of a chromatographic column is prolonged, and impurity judgment errors caused by drifting of peak appearance time are avoided.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and in particular relates to an optimized detection method for azithromycin-related impurities. Background technique [0002] The chemical name of Azithromycin is (2R, 3S, 4R, 5R, 8R, 10R, 11R, 12S, 13S, 14R)-13-[(2,6-dideoxy-3-C-methyl-3-O -methyl-α-L-nucleo-hexapyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl -11-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xyl-hexapyranosyl]oxy]-1-oxa-6-azacyclopentadecane -15-ketone is a macrolide antibacterial drug. Compared with erythromycin, it is stable to acid, and it is not damaged by gastric acid when taken orally. It has a long half-life, high concentration in tissues and cells at the infection site, and is Gram-negative. The antibacterial effect is expanded, especially the effect on influenza bacillus is strengthened, the antibacterial spectrum is wider, and the antibacterial effect is stronger. [0003] Azithromycin (Azithromyci...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N30/02G01N30/06G01N30/86
CPCG01N30/02G01N30/06G01N30/8631
Inventor 王正雄张阳玲朱丽君徐金喜肖伟平何亚娟
Owner HUBEI HONGYUAN PHARMA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com