GC/MS is a destructive method of testing that yields information on the chemical composition of the analyte. ATS’ chemical analysis lab uses this method to isolate, identify, and measure compounds of interest if present in sample materials. ATS provides results at the parts-per-billion (ppb) level when performing this test — a far greater sensitivity than required by regulations on Azo dyes. We can achieve these low detection limits because of the sensitivity of ATS’ analytical equipment and our chemists’ experience in regularly performing the method to relevant standards.