IEH is an industry leader in food and feed contaminants and adulterants trace residue testing. IEH utilizes state-of-the-art instrumentation such as HPLC, UHPLC, LC/MSMS, GC-FID, GC/MS, GC/MSMS, ICP-AES and ICP/MS, for the determination of trace level contaminants in food, feed, grains and nutraceuticals. All methods follow US and international MRL (Maximum Residue Limits) regulations.