TY - JOUR
T1 - Revisiting shape selectivity in liquid chromatography for polycyclic aromatic hydrocarbons (PAHs) – six-ring and seven-ring Cata-condensed PAH isomers of molecular mass 328 Da and 378 Da
AU - Ona Ruales, Jorge
AU - Sander, Lane C.
AU - Wilson, Walter B.
AU - Wise, Stephen A.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The relationship of reversed-phase liquid chromatography (RPLC) retention on a polymeric C18 stationary phase and the shape of polycyclic aromatic hydrocarbons (PAHs) was investigated for three-ring to seven-ring cata-condensed isomers. We report the first RPLC separation for six-ring and seven-ring cata-condensed PAH isomers. Correlations of LC retention and shape parameters (length-to-breath ratio, L/B and thickness, T) were investigated for 2 three-ring isomers (molecular mass 178 Da), 5 four-ring isomers (molecular mass 228 Da), 11 five-ring isomers (molecular mass 278 Da), 17 six-ring isomers (molecular mass 328 Da), and 20 seven-ring isomers (molecular mass 378 Da). Significant linear correlations were found for all isomer groups (r = 0.71 to 0.94). Nonplanarity of the PAH isomers was found to influence retention (i.e., nonplanar isomers eluting earlier than expected based on L/B) and linear correlations of retention vs. T for isomer groups containing nonplanar isomers were significant (r = 0.71 to 0.86). [Figure not available: see fulltext.].
AB - The relationship of reversed-phase liquid chromatography (RPLC) retention on a polymeric C18 stationary phase and the shape of polycyclic aromatic hydrocarbons (PAHs) was investigated for three-ring to seven-ring cata-condensed isomers. We report the first RPLC separation for six-ring and seven-ring cata-condensed PAH isomers. Correlations of LC retention and shape parameters (length-to-breath ratio, L/B and thickness, T) were investigated for 2 three-ring isomers (molecular mass 178 Da), 5 four-ring isomers (molecular mass 228 Da), 11 five-ring isomers (molecular mass 278 Da), 17 six-ring isomers (molecular mass 328 Da), and 20 seven-ring isomers (molecular mass 378 Da). Significant linear correlations were found for all isomer groups (r = 0.71 to 0.94). Nonplanarity of the PAH isomers was found to influence retention (i.e., nonplanar isomers eluting earlier than expected based on L/B) and linear correlations of retention vs. T for isomer groups containing nonplanar isomers were significant (r = 0.71 to 0.86). [Figure not available: see fulltext.].
KW - High molecular mass PAHs
KW - Length-to-breadth ratio (L/B)
KW - Nonplanarity
KW - Polycyclic aromatic hydrocarbons (PAHs)
KW - Reverse-phase liquid chromatography (RPLC)
KW - Shape selectivity
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U2 - 10.1007/s00216-017-0456-x
DO - 10.1007/s00216-017-0456-x
M3 - Article
AN - SCOPUS:85025118667
VL - 410
SP - 885
EP - 896
JO - Fresenius Zeitschrift fur Analytische Chemie
JF - Fresenius Zeitschrift fur Analytische Chemie
SN - 0016-1152
IS - 3
ER -