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

A dynamic vapor adsorption analysis method for amorphous content of formoterol fumarate

A formoterol fumarate, adsorption analysis technology, applied in the field of dynamic vapor adsorption analysis of the amorphous content of formoterol fumarate, can solve problems such as the method for determining the amorphous content that has not been reported

Active Publication Date: 2021-07-27
SHANGHAI SINE YELLOW RIVER PHARMA CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the systematic research on the amorphous generation process in the process of formoterol fumarate dihydrate, and there is no report on the determination method of its amorphous content.

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
  • A dynamic vapor adsorption analysis method for amorphous content of formoterol fumarate
  • A dynamic vapor adsorption analysis method for amorphous content of formoterol fumarate
  • A dynamic vapor adsorption analysis method for amorphous content of formoterol fumarate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation and characterization of ball-milled samples

[0040] Take an appropriate amount of formoterol fumarate in a ball mill, and after ball milling for 1 hour, the samples are characterized by XRPD, TGA and FTIR respectively.

[0041] figure 1 It is an XRPD spectrum, showing that the sample is a mixture of amorphous and crystalline forms after ball milling;

[0042] figure 2 and image 3 It is the TGA comparison spectrum before and after ball milling. The result shows that the weight loss of the sample before 150 CO is 2.26% after ball milling for 1 hour, which is lower than the mass loss before ball milling (3.92%); The disappearance of hydrates.

[0043] Figure 4 and Figure 5 It is the FTIR comparison spectrum before and after ball milling. The result shows that after 1 hour of ball milling, the absorption peak of crystal water becomes weaker, and the process of ball milling is accompanied by the disappearance of crystal water.

Embodiment 2

[0045] Preparation and Characterization of Amorphous Formoterol Fumarate

[0046] Weigh 0.30±0.01g of FORC (formoterol fumarate dihydrate), dissolve it in 150mL of methanol, shake it, and ultrasonicate for 3 minutes to dissolve completely, and obtain a clear liquid. Amorphous samples were prepared by spray drying. After the sample was prepared, the sample was collected after the temperature dropped to room temperature.

[0047] The XRPD patterns of FORA (formoterol fumarate amorphous) and FORC are respectively as follows Figure 6 shown. Obvious broad diffraction peaks were observed in the XRPD pattern of FOR A, and no type characteristic peaks were found. The XRPD pattern of FORC has the characteristic absorption peak of FORC, which is consistent with the literature report.

[0048] Figure 7 It is the FTIR spectrum of the sample after spray drying, and the result shows that after spray drying, the water of crystallization disappears completely, which proves that amorpho...

Embodiment 3

[0050] Establishment and validation of a method for the detection of amorphous content of formoterol fumarate

[0051] Development of a method for the determination of the amorphous content of formoterol fumarate using a dynamic vapor sorbent (DVS).

[0052] The control steps of the dynamic vapor adsorption instrument include:

[0053] S1: Equilibrium steam for 4 hours at 25°C and 0% RH;

[0054] S2: At a rate of 10% RH, the gradient is increased from 0% RH to 90% RH, and mass balance is maintained for 15 minutes under each gradient relative humidity (the condition for maintaining mass balance is that the mass change of the sample is <0.01%);

[0055] S3: Decrease from 90% RH gradient to 0% RH at a rate of 10% RH, and maintain mass balance for 15 minutes under each gradient relative humidity (the condition for maintaining mass balance is that the sample mass change < 0.01%);

[0056] S4: The instrument automatically calculates the weight increment W.

[0057] Prepare samples ...

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

No PUM Login to View More

Abstract

The invention provides a dynamic vapor adsorption analysis method for the amorphous content of formoterol fumarate, which comprises the following steps: Step 1: using a dynamic vapor adsorption instrument to measure amorphous formoterol fumarate and fumaric acid respectively Dynamic vapor adsorption curve of formoterol dihydrate crystalline form; step 2: mix formoterol fumarate amorphous form and formoterol fumarate dihydrate crystalline form according to different mass ratios, and measure the dynamic vapor Adsorption curve; Step 3: Calculate the amorphous content C of formoterol fumarate according to the weight gain W of the mixed sample in Step 2 after crystallization in steam. The above dynamic vapor adsorption analysis method can be used to accurately, effectively and quantitatively detect the content of amorphous form of formoterol fumarate, thereby providing good quality assurance for formoterol fumarate dry powder inhaler.

Description

technical field [0001] The invention belongs to the technical field of drug analysis, in particular to a dynamic vapor adsorption analysis method for the amorphous content of formoterol fumarate. Background technique [0002] Formoterol Fumarate is a long-acting β-receptor agonist, the main principle is to directly excite bronchial β2-receptors to achieve anti-asthma effect. Indications for the treatment and prevention of reversible airway obstruction. In maintenance therapy, it is also suitable as an add-on to anti-inflammatory drug therapy. The preparation of formoterol fumarate dry powder inhalation can achieve the effect of directly delivering the drug powder to the lung through the device, thereby providing bioavailability and efficacy. In dry powder inhalers, formoterol fumarate usually exists in the form of dihydrate. [0003] Jet milling is a common process for preparing dry powder of inhalable formoterol fumarate dihydrate. The principle is to use the self-grind...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/02G01N1/28
CPCG01N1/286G01N5/02
Inventor 卢望丁谭中华王然罗国军杜狄峥
Owner SHANGHAI SINE YELLOW RIVER PHARMA CO LTD
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