3.3.2. Linearity
Peak areas versus concentration in milligram per milliliter were
plotted for sodium hyaluronate at the concentration range between
80.0 and 120.0% of target level. Sodium hyaluronate showed
linearity in the range of 0.32–0.48 mg/mL, respectively. Linear
regression equations and correlation coefficient (r
2
) are provided
below: Ysodium hyaluronate¼124908.2x−101,658 (r
2
¼0.999910).