Sulfadimethoxine-d6 is an isotopically labeled compound of sulfonamide antibiotics. It is typically utilized as an analytical standard in chromatographic determinations. Purpose： Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support. Sulfadoxine-d6 may be used as an analytical standard for the determination of various sulfonamides in: Wastewater samples by ultra-performance liquid chromatography-triple quadrupole-linear ion trap mass spectrometer (UPLC-QqLit-MS). Fish samples as well as soil, sludge and manure samples[3] by LC with tandem mass spectrometry (MS/MS).