The image appears to be a QC report from a column. That only says the column passed the manufacturer tests, and won't guarantee that it can be used for any analysis.

The column can probably be used. What determines if the column can be used is if it resolves the analyte, the aflatoxin, from the other compounds so that it can be quantitated, with a peak shape that allows accurate measurement. The only way to determine that is to develop a method for aflatoxin, and then verify the sample doesn't have interfering compounds. The solvent system will play a role in method development too. This is done with positive and negative controls, and spiking studies. How to do those studies is beyond the scope of a discussion here.

Hesna, please follow Jack's advice. The image file you included is a column QC test report which only has value to the column manufacturer and very little value to you. Your own HPLC application and method need to be developed first (research the topic on your own first to review actual applications and methods which are similar to your own to get started). Please contact someone at your school who is experienced in HPLC method development for assistance with your project/application.