The analysis of drugs and their metabolites in biological media are now expected to routinely achieve � 20% accuracy in the ng/mL concentration level. Therefore, the availability and the selection of quality ion-pairs designating the analytes and their isotopically labeled analogs (ILAs) are important considerations in achieving the accuracy of qua
Isotopically Labeled Analog as Internal Standard for Drug Quantitation � Methodology. Mass Spectra of Commonly Abused Drugs and Their Isotopically Labelled Analogs in Various Derivatization Forms. Cross-Contributions of Ion Intensity Between Analytes and Their Isotopically Labeled Analogs in Various Derivatization Forms. Index.