This Reagecon Polycyclic Aromatic Hydrocarbon (PAH) Surrogate Standard (2 Compound Mix) is a ready to use product, that can be used to monitor the complete analytical process, from sample preparation to instrument performance. Typically, this mixture contains compounds similar in chemical composition to analytes of interest in environmental and batch QC samples that may be spiked with such a surrogate mix. Surrogate recoveries for environmental samples, can then be used to evaluate matrix interference and extraction efficiency. Such products can be used for a variety of gas and liquid chromatography methods that include GC, GC-MS, HPLC and LC-MS. This product can also be used to validate appropriate test methods or qualify an instrument in a regulated industry. The product is tested on a high performance GC-MS.