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Isoprenoid glycerol dialkyl glycerol tetraethers (iGDGTs) are biomarkers of archaea, but improvement is needed for more precise analysis of intact polar lipid (IPL)-iGDGTs. Here, we present a multiple reaction monitoring (MRM) method for IPL-iGDGTs using reversed phase liquid chromatography (RP-LC) and triple quadrupole mass spectrometry equipped with electrospray ionization (RP-LC–ESI-MRM). The MRM...
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