¹³C and ¹⁵N internal standards enable the accurate determination of the analyte of interest and provide the advantage of:

·         Co-elution with analyte

·         Correction for sample-to-sample matrix variation

·         No loss of deuterium on the instrument or in solution

·         No detectable unlabelled material

·         Many offered in ready to use certified solutions.

Please note that many of these products can be considered Controlled Substances and may require licensing with the appropriate authorities prior to shipment. Please contact us for further information regarding licensing and shipment.