Standard Residential IAQ Kit

Formaldehyde and solvents are the two indoor-air questions people actually have — and they need two completely different collection chemistries. No consumer product covers both.

One badge binds aldehydes chemically for analysis by HPLC; the other adsorbs solvents onto charcoal for analysis by GC-MS. They deploy together in the same room over the same period and come back as a single report covering both.

Use the included guide to choose the room. Open both badge pouches and write down the exact start time for each. Place them side by side (a few inches apart) at breathing height (3–5 ft), in the middle of the room, away from vents, windows, purifiers and direct sun.

Leave both undisturbed for 8 to 12 hours while living normally (the VOC badge governs the window). Seal both back into their pouches, record both end times, and post them together the same day. Return within 14 days of use.

The two badges use different chemistry by design. The aldehyde badge traps formaldehyde and acetaldehyde as stable DNPH derivatives, analysed by high-performance liquid chromatography — each carbonyl reported separately. The solvent badge adsorbs vapour onto activated charcoal, analysed by gas chromatography with mass spectrometry — each of 25 compounds named and quantified.

Both go out at the same moment in the same room, so the two results describe the same air over the same period — which is what makes a combined report meaningful rather than two unrelated numbers.