Geochemistry, Geophysics, Geosystems. American Geophysical Union Schouten, S, Hopmans, E, van der Meer, J & Mets, A 2009, ' An interlaboratory study of TEX86 and BIT analysis using high-performance liquid chromatography-mass spectrometry. ', Geochemistry, Geophysics, Geosystems . https://doi.org/10.1029/2008GC002221