In addition to certified BTEX in unleaded gasoline, Restek now offers a Certified Aromatics in Composite Gasoline. These solutions are prepared from unleaded gasoline composites. After preparation and packaging, the concentration of each aromatic compound is certified by GC/MS analysis. Complete data packs are available that include all gravimetric, QC, and calibration data.

*Concentration differs lot-to-lot. See on-line Certificate of Analysis for certified concentrations.