Laboratory Tested. Purity Verified. Using gas chromatography and mass spectrometry (GC-MS), Sally's Organics test the purity of all of oils and hydrosols. They also perform antimicrobial testing of all bulk ingredients, as well as taking samples of the products after bottling for another round of antimicrobial testing. At every step of this process, they are using USDA Certified Organic ingredients and standards to ensure you are getting a botanically active, pure, and potent product.