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Journal articles
Understanding the vanadium−asphaltene nanoaggregate link with silver triflate complexation and GPC ICP-MS analysis
Abstract : The effect of silver triflate (AgOTf) on the interaction between vanadium and asphaltene nanoaggregates was investigated by gel permeation chromatography inductively coupled plasma high-resolution mass spectrometry (GPC ICP-HR-MS). The results showed that disaggregation of some vanadium compounds linked to asphaltene nanoaggregates occurred when silver triflate was added. Ag+ can partially move some porphyrins from the high-molecular-weight (HMW) region to the low-molecular-weight (LMW) region. It was inferred that the interaction between Ag+ and the porphyrins surroundings led to a decrease in the size of the nanoaggregates (HMW region) and an increase in the “free” V porphyrin compounds (MMW and LMW regions). Asphaltenes from a similar origin, presenting the same vanadium GPC ICP-MS profile, gave different GPC ICP-MS profiles after AgOTf addition, which could be linked to the difference in geochemistry of the samples.
https://hal-univ-pau.archives-ouvertes.fr/hal-03021936
Contributor : Hal Iprem <>
Submitted on : Tuesday, November 24, 2020 - 3:31:15 PM
Last modification on : Monday, December 14, 2020 - 3:41:29 PM
Contributor : Hal Iprem <>
Submitted on : Tuesday, November 24, 2020 - 3:31:15 PM
Last modification on : Monday, December 14, 2020 - 3:41:29 PM