125. discriminative metabolomics The process of comparing the metabolites present in multiple samples collected under different conditions (e.g., disease states and drug treatment – among others) conducted to identify which metabolites are associated with the different conditions under which the samples are collected.
126. diversion of LC flow Typically used to direct mobile eluent-containing contaminants at a time point before the elution of the analyte of interest away from the LC–MS source. Usually a make-up mobile phase is directed to the LC–MS source while the eluent is diverted away in order to maintain instrument stability (e.g., avoid drying the curtain plate).
127. doping analysis Laboratory procedures aimed at ascertaining the use of banned performance-enhancing substances and methods in sport by the analysis of biological fluids.
