Squalene in Shark Oil

The purpose of this experiment was to test the concentration of squalene from various oils. I would use these results to compare them to shark liver oil, which is high in squalene. This research is used to uncover an alternative to shark oil used in vaccines. Squalene is the main component in shark oil used in vaccines. It helps vaccines be more effective by boosting the immune system. This alternative can reduce the harvesting of sharks for their oil. To conduct this experiment, I used a spectrophotometer to measure the wavelengths of squalene in each oil. Then, once compared to the shark liver oil, I can use the results to determine what oils could be used to substitute shark oil if any. My problem is figuring out the concentration of squalene in each oil based on the graph. I've attached the graph that I am using to compare the oils.