Premixed Pesticide and Multi-Compound CRMs Chemical pesticides have become an integral part of the agricultural toolbox, offering protection to crops from destructive pests. However, an unfortunate side effect of their use is the potential leaching of these, oftentimes, harmful chemicals into the environment leading to their eventual presence in the human food chain. As a result, pesticide residue analysis has become a critical testing process for many different types of laboratories. Unfortunately, pesticide residue testing is a long, expensive and complicated process, covering hundreds of different compounds. As the leader in GC, GC/MS, HPLC, and LC/MS pesticide CRMs, SPEX CertiPrep is happy to assist you with all of your pesticide CRM needs.