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- W1973443405 abstract "Abstract Levoglucosan is a unique marker for biomass burning that can be transported in the atmosphere and preserved in archives such as ice cores. A new method to determine the concentrations of levoglucosan in Tibetan ice-core samples using high-performance liquid chromatography with electrospray ionization mass spectrometry (HPLC-ESI/MS) was developed. Levoglucosan was separated from coeluting water-soluble organic compounds using a C 18 column with a gradient program from 50% to 90% methanol in ultrapure water. An external standard calibration curve ( R 2 = 0.9958) was established by plotting the ion m/z 163 [M+H] + peak area versus the amount of analyte. The repeatability ranges between 11% and 2% at a concentration around 10 and 150 ng mL −1 . The limit of detection was 10 ng mL −1 and the limit of quantification was 40 ng mL −1 . Levoglucosan concentrations ranged from 10 to 718 ng mL −1 in the Muztagh Ata ice core and from 10 to 93 ng mL −1 in the Tanggula ice core. These concentrations, up to 1000 times higher than those measured in samples from Antarctic and Greenland, showed the higher vulnerability of the Tibetan Plateau glaciers to biomass burning events." @default.
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- W1973443405 date "2013-01-01" @default.
- W1973443405 modified "2023-10-04" @default.
- W1973443405 title "Levoglucosan concentrations in ice-core samples from the Tibetan Plateau determined by reverse-phase high-performance liquid chromatography–mass spectrometry" @default.
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- W1973443405 doi "https://doi.org/10.3189/2013jog12j157" @default.
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