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 $142.00 Acidity $44.50 Moisture $33.25 High Boiling Residue & Solids $33.25 Chloride $33.25 Non-Condensable Gases $33.25 Other Refrigerants $55.50