Table 2. Limits of Detection (LODs) Calculated for Ethanol, Acetic Acid, and Acetone for Ionization by Au⁺, Ag⁺, and Cu⁺ Ions.

	LOD (nmol/L)
	ethanol	acetic acid	acetone
[Au + H2O + VOC]+	0.9	1.4	0.1
[Ag + H2O + VOC]+	0.9	0.2	0.5
[Ag + VOC]+	0.4	0.1	0.5
[Cu + H2O + VOC]+	0.7	0.3	0.1