Used as Internal Standard for method validation in Bioanalytical Studies as comparison for formulation while filings in USFDA, UKMHRA, WHO.
Ideally in bioanalysis, a Deuterated Internal Standard will have the same extraction recovery, ionization response in ESI mass spectrometry and the same chromatographic retention time. An important characteristic of a deuterated internal standard is that it should co-elute with the compound to be quantified. Also it should also contain enough mass increase to show a signal outside the natural mass distribution of the analyte. With this fact in mind, the design of a suitable deuterated internal standard can become a real challenge simply because the analyte of interest contains two chlorine atoms, for instance, and will need a +6 or +7 mass increase to show a signal not interfering with the analyte.
Your Bioanalysis will be greatly improved by the use of deuterated Internal Standard. The chromatography time will be reduced and your assay will be more robust, as it will increase the throughput and lower your rejection rates.
