Fixed Pathlength Cell Analysis
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#. Similarly, you will run your samples again using a fixed pathlength
   cell to determine which method is better at analyzing your samples
#. Using a plastic syringe, you will inject your sample into the cell
   (it may overflow slightly)
#. Following the sample procedure above, you will run each of your
   samples, flushing the fixed cell with methylene chloride in between
   runs. 

   .. tip::
      Starting with the least concentrated sample and working up to the most
      concentrated sample will greatly increase the accuracy of the data for
      fixed salt plates.

#. Once all of your scans has finished you can analyze your data similar
   to the steps provided above when using the salt plates.