Objective: To establish a kinetic chromogenic assay for the determination of bacterial endotoxin in fondaparinux sodium injection. Methods: According to the requirements of the 2020 edition of the Pharmacopoeia of the People's Republic of China（General Chapter 1143 Bacterial Endotoxin Inspection Method）,the Pyros Kinetix® Flex（PKF） quantitative detection system for bacterial endotoxin was used,and the dynamic color method of Limulus reagent was used to establish a bacterial endotoxin standard curve．The dilution factor was determined through interference pre-experiment,the recovery rate of the endotoxin added to the test solution was determined, and the interference test to complete the quantitative detection test of the bacterial endotoxin content in the test product was performed．A standard curve was automatically drawn and produced through pyros® EQS software, the absolute content of endotoxin in the solution was calculated,and a report was generated and stored in the oracle database. Results: The linear range of the concentration of the standard curve was 0.001 to 0.125 EU· mL-1（r=-0.999 1）,and the regression equation of the standard curve was lgT=-0.265 8 lgC+2.818,which was average when the test product was diluted 5 000,10 000,15 000,16 500．There was no interference effect on the reaction,the recovery rate of bacterial endotoxin was in the range of 50% to 200%,and the endotoxin quantitative detection results of the 4 batches of test products all met the regulations. Conclusion: On the Pyros Kinetix® Flex （PKF） bacterial endotoxin quantitative detection system platform,a kinetic chromogenic assay can be established for the determination of bacterial endotoxin content in fondaparinux sodium injection．This method can quickly and quantitatively detect endotoxin content in samples.
WANG Ju-cai, WANG xue
. Determination of bacterial endotoxin in fondaparinux sodium injection by kinetic chromogenic assay[J]. Chinese Journal of Pharmaceutical Analysis, 2021
, 41(1)
: 180
-184
.
DOI: 10.16155/j.0254-1793.2021.01.22
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