title: Dual detection approach to a more accurate measure of relative purity in high-throughput characterization of compound collections.
abstract: The accurate determination of compound purity is crucial for characterizing library purity, monitoring the stability of storage compounds, and obtaining meaningful high-throughput screening results. However, current high-throughput techniques for the determination of compound purity are inadequate. We evaluated on-line chromatography detectors, including UV(TWC), UV(214), and ELSD detectors, in a series of studies of 233 compound mixtures prepared with known compositions. Results indicate that both UV(TWC) and UV(214) overestimate the minor component in a mixture whereas ELSD underestimates the minor component. An average of UV(TWC) and ELSD purities gives a more accurate measure of the relative purity for a wide range of compounds in various purity ranges. This technique was applied to 959 compounds from our compound collection to more accurately determine their relative purity.
authors.affiliation: St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.
authors.forename: Andrew
authors.initials: A
authors.lastname: Lemoff
authors.forename: Bing
authors.initials: B
authors.lastname: Yan
mesh_terms: D001681:Biological Assay / Q000379:methods*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D020650:Combinatorial Chemistry Techniques / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011786:Quality Control; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
chemical_list: D004364:Pharmaceutical Preparations