11/11 Second Visit :)

Yeah:) This time I actually found the room without getting lost :)
So Katie and I analyzed the UV spectrum results that we got from last time's experiment. Last time we tried with concentrations 20,10,and 2 mg/ml, and we found that only the one of 2mg/ml concentration had weird peak and absorption. Thus, we concluded that there must be a lowest concentration that the Spectrum can actually detect.
Thus, in order to find that lowest concentration, we did the same procedure from last time (expect this time with concentration 10,8,5,3,and 2) This time I was more engaged :) because I am getting more and more comfortable with using the tools!
We put those into the UV spectrum again, then sadly we realized that 10 is the limit. (8,5,3,and 2 all showed off results)
While it is good that we found out limit, it is sad that the limit is such a big number (compare to concentration that we will get from real life sample)
That is, it is possible that we sample something that contains the substance but it is just too small for us to detect.
Katie and I think for next time we may just double check with our data again, and soon we will get water sample for the swage to start analyzing!