Solution Concentration (mg/mL) Cefazolin and Salicylic acid Area Ratio (RSD%)a
Standard 1 36 0.691 (0.4%)
Standard 2 44 0.845 (0.3%)
Standard 3 52 0.992 (0.6%)
Standard 4 60 1.156 (0.2%)
Standard 5 67 1.308 (0.9%)
Sample A Unknown 0.989 (0.6%)
Sample B Unknown 0.977 (1.0%)
Sample C Unknown 0.973 (0.5%)
a Results calculated from three injections
Table 1: Area of standards and samples solutions of cefazolin obtained by HPLC.