The EPA requires recycled refrigerants to be tested according to the ARI 700 standard for Refrigerant Purity before they can be sold on the market. These samples are tested for a wide range of properties, including contamination from other refrigerants. Tests can also be purchased individually if a complete analysis is not required. ARI 700 Analysis $136.00 Acidity $42.40 Moisture $31.80 High Boiling Residue & Solids $31.80 Chloride $31.80 Non-Condensable Gases $31.80 Other Refrigerants $53.00