TY - GEN
T1 - Analysis of Maya crude oil
AU - Herod, Alan A.
AU - Morgan, Trevor J.
AU - Alvarez, Patricia
AU - George, Anthe
AU - Millan, Marcos
AU - Kandiyoti, Rafael
PY - 2009
Y1 - 2009
N2 - Maya crude oil was separated into maltenes (heptane solubles) and asphaltenes (toluene solubles) and the asphaltene fraction was further separated into NMP-soluble and -insoluble fractions. These fractions were examined by SEC in NMP/chloroform eluent and by UV-fluorescence spectroscopy. LD-MS was used to estimate ion mass ranges after fractionation using TLC before exposure to the laser, to separate small and large ions. This allows the application of variable laser power to the small and large molecules separately; this method avoids exposure of small molecules to high laser power, since ionized cluster ions may form from small molecules and mask the large ions, in the absence of separation. The LD-MS results indicated that the most intense peak of the maltene fraction was below m/z 1000, but the peak masses for the asphaltene fractions increased up to m/z 2000, with high mass limits of around m/z 10,000, in reasonable agreement with SEC results.
AB - Maya crude oil was separated into maltenes (heptane solubles) and asphaltenes (toluene solubles) and the asphaltene fraction was further separated into NMP-soluble and -insoluble fractions. These fractions were examined by SEC in NMP/chloroform eluent and by UV-fluorescence spectroscopy. LD-MS was used to estimate ion mass ranges after fractionation using TLC before exposure to the laser, to separate small and large ions. This allows the application of variable laser power to the small and large molecules separately; this method avoids exposure of small molecules to high laser power, since ionized cluster ions may form from small molecules and mask the large ions, in the absence of separation. The LD-MS results indicated that the most intense peak of the maltene fraction was below m/z 1000, but the peak masses for the asphaltene fractions increased up to m/z 2000, with high mass limits of around m/z 10,000, in reasonable agreement with SEC results.
UR - https://www.scopus.com/pages/publications/78649508602
M3 - Conference contribution
AN - SCOPUS:78649508602
SN - 9780841224414
T3 - ACS National Meeting Book of Abstracts
BT - American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
ER -