text: Sigma-Aldrich Co. LLC Aug 21, 2014
  Part of Psychoactive Substance Certified Reference Materials line, 9 stable isotope-labeled internal standards of 2C amines are available, including deuterium and 13C labeling. Solutions are suitable for use in isotope dilution methods or other quantitative applications in clinical toxicology, urine drug testing, forensic analysis, or workplace drug screening. Cerilliant Certified Spiking Solutions® are manufactured and certified to ISO Guide 34, ISO/IEC 17025, ISO 15194, and ISO 13485.