<cri_photo_page hplc_analysis5 | stock_photo:labs:nat_prod:activities:hplc_analysis:hplc_analysis5_s.jpg | stock_photo:labs:nat_prod:activities:hplc_analysis:hplc_analysis5_l.jpg | stock_photo:labs:nat_prod:activities:hplc_analysis:hplc_analysis5_o.jpg | 26 January 2009 | HPLC analysis >