Fig. 4: Vitek-MS spectra comparison between COVISHIELD™ and polysorbate 80 from three different manufacturers. | npj Vaccines

Fig. 4: Vitek-MS spectra comparison between COVISHIELD™ and polysorbate 80 from three different manufacturers.

From: Identifying falsified COVID-19 vaccines by analysing vaccine vial label and excipient profiles using MALDI-ToF mass spectrometry

Fig. 4: Vitek-MS spectra comparison between COVISHIELD™ and polysorbate 80 from three different manufacturers.

a Spectra over the 500-2,500 m/z mass range showing different profiles of polysorbate 80 with the most dominant evenly spaced peaks between 600 and 2200 m/z. b PCA scores plot showing the distinct grouping of COVISHIELD™ and polysorbate 80 from three different manufacturers. Samples were run with four technical replicates for each and only two representative spectra are shown.

Back to article page