I worked on these problems for a long time, since I am from the American USDA faction that believes L-lactic acid (LA) and CO2 plus moisture are the most critical elements. The "cheesy foot" pursuit of workers at Wageningen U. illustrated problems, as they omitted L-Lactic acid, apparently on purpose.  All human skin emits LA (at different rates depending on the area sampled) and CO2 (ditto, which we measured with a Mine-Safety Apparatus instrument).  I think Ae. albopictus may be a good test animal to look at human emanation odors with "the essential LA and CO2 as catalysts".  I argued over the testing of single component C4-C10 fatty acids without "these catalysts/ primers" to no avail. Also we never had laboratory-reared Ae. albopictus mosquitoes back in the day (1970-1990), because they had not yet been spread all over the world in used Japanese auto tires.  Good luck and good science with these pursuits.