*2.4. Effect of Stirring Speed in SAC*

For this part of the experiment, the coolant temperature and cooling time were kept constant, at −8 ◦C and 15 min, respectively. The parameter range for stirring speed is 120 rpm, 130 rpm, 140 rpm, 175 rpm and 210 rpm. Figure 5 shows the plotted graph using GC-MS data for FAME purity against stirring speed while Table 3 showed the observation of the effect of stirring speed in SAC. For the stirring speed parameter, at a constant −8 °C and cooling time of 15 min, a stirring speed of 210 rpm indicates the optimum value to yield the highest purity of FAME content, which is 99.606% purity.

**Table 3.** Observation for the effect of stirring speed in SAC.


#### **3. Discussion**
