Determination of recombinant human epidermal growth factor(rhEGF)content in rhEGF eye drops by ELISA
Objective:To establish a method for the determination of rhEGF content in rhEGF(recombinant human epidermal growth factor)eye drops and perform method validation.Methods:The content of rhEGF in eye drops was determined using a commercial kit Quantikine by enzyme-linked immuno sorbent assay(ELISA).Results:The linear range of the standard curve was 20-200 pg/mL.The relative standard deviation(RSD)of intermediate precision was 14.98%(n=9).The average recoveries of low,medium,and high concentrations of samples were 94.08%,100.46%and 104.89%with RSD 11.03%,9.85%,8.75%(n=3),respectively.The RSD for 10 replicates was 5.58%.Conclusion:The ELISA method established in this study has a good specificity,precision,accuracy and stability,and is suitable for the determination of the content of rhEGF in rhEGF eye drops.