VOCs are emitted from a complex variety of anthropogenic and natural sources to the Earth’s atmosphere. There is growing evidence that both aerosol and non-aerosol consumer products, including personal care products (PCPs) and household cleaning products (HCPs), contribute an increasing proportion to anthropogenic VOC emissions. Meanwhile, historical sources of VOCs such as road transport continue to decline. An increasing fraction of VOC emissions come from the domestic use of solvents, which can be found in a range of consumer products. However, emission rates are often poorly characterized and depend significantly on the individual behavior of the chemical. An ability to selectively quantify VOC real-time concentrations and emissions in both ambient and indoor air is of importance, to understand and characterize the sources and sinks of individual VOCs.