“…Lubricant base oils; 166 Asphaltene fractions; 193,194,[231][232][233][234] Bitumen; 235 S-containing compounds; 28,182,232,[236][237][238][239] polychlorinated naphthalenes (PCNs); 225 polycyclic aromatic hydrocarbons (PAHs); 28,78,226,233,240 Cycloalkanes; 78,241,242 Steroids compounds; 243 N-, O-containing compounds 28,206,232,244,245 More suitable for non-polar samples than ESI but less than APPI. Thermal degradation and fragmentation are problems.…”