SEARCH Articles Figures Tables Base-catalyzed hydrogen isotope preparation Biotransformations in the Preparation of Compounds Labeled with Carbon and Hydrogen Isotopes Carbon isotopes preparation Hydrogen isotopes preparation Isotope ratio mass spectrometry sample preparation Isotopes sample preparation Nitrogen isotope analysis sample preparation Oxygen isotopes preparation Preparation isotopes Preparation isotopes Preparation of Tritium-Labeled Compounds by Isotope Exchange Reactions Sample preparation for isotopic analysis Samples isotopic, preparation Sulfur isotopes preparation The preparation of various isotopes