Some components of smoke are characteristic of your combustion source. Guaiacol and its derivatives are solutions of pyrolysis of lignin and are characteristic of Wooden smoke; other markers are syringol and derivates, as well as other methoxy phenols. Retene, a product of pyrolysis of conifer trees, is an indicator https://broadfar.com/oraco-global-trends-in-heat-not-burn-products/