Fluoro-Spec briefing
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Two perovskite kits for a public lead-dust program: what actually differs?

Fluoro-Spec and the Lumetallix kit run on the same peer-reviewed chemistry, so this is not a question of one science being better than the other. For a program putting kits in residents' hands to find settled lead dust, the differences that matter are practical: how much solution comes in a kit, how much surface that kit can actually screen, the effective cost per test, and what program support comes with it. Every figure below is either the maker's own stated number or independently verifiable.

The method under both kits is the same, and it is peer-reviewed.
Both kits use a methylammonium bromide perovskite fluorescence reaction. That method is published and peer-reviewed: van Geen, Helmbrecht, Ritter et al., Analytica Chimica Acta 1307 (2024) 342618, evaluated against portable XRF and laboratory ICP-AES. The study tested the Lumetallix kit, and Eric Ritter of Fluoro-Spec is a co-author. The chemistry is sound in both products. The choice for a distribution program is about practical fit, not about the science. Read the paper.

The Fluoro-Spec kit

Plainly, with no sales language, here is what is in the kit and what it does.

The Fluoro-Spec 30 ml lead test spray bottle.
The 30 ml spray bottle, the unit a program hands out.
  • In the kit: a 30 ml spray bottle of test solution, a dropper bottle of test solution good for roughly 3,600 drip tests, a rechargeable 365 nm UV light, a reference and instruction card, and the pouch it ships in.
  • Test solution: isopropyl alcohol (CAS 67-63-0) at 97.25% or more, methylammonium bromide (CAS 6876-37-5) at 1.5%, and mandelic acid (CAS 90-64-2) at 1.25%.
  • Coverage: the spray bottle gives about 170 sprays, about 500 with the spray-extender ring, each spray covering roughly a palm-sized area. The dropper bottle adds about 3,600 single-drop tests for checking specific spots.
  • Reading it: a bright green glow under the 365 nm UV light means lead is present on that surface. No glow means none was detected there.
  • Who uses it: residents, with no certification or training required.

For putting kits in residents' hands, what should a program weigh?

The job in a public dust program is to find settled lead-based-paint dust across surfaces in occupied homes, by non-specialists. Read the comparison with that job in mind.

The Lumetallix reagent next to the Fluoro-Spec spray bottle, showing the size difference.
Left, the Lumetallix reagent. Center, the Fluoro-Spec 30 ml spray. The difference in solution per kit is the practical point, not a difference in chemistry.
  Fluoro-Spec Lumetallix (as the maker states)
Solution per kit 30 ml, one spray bottle 10 ml plus 9 ml, per the maker
Stated test count About 170 sprays from the 30 ml spray bottle, about 500 with the spray-extender ring, plus about 3,600 drip tests from the dropper bottle About 400, which the maker counts across a spray and a single-drop dropper combined
Fit for dust screening Spray covers about a palm-sized area in one pass, which is the motion screening a surface for settled dust needs The 400 count includes a single-drop dropper. A single drop tests a point, not an area, so it is suited to a known spot rather than screening a surface for dust
Effective cost per test Lower: more solution and more covered surface per kit at the kit price Higher overall per kit, per the program's own note
Program support Program-branded packaging, an education screener, refills and a gallon refill option, from a single maker (below) Not addressed here; the maker can speak to its own program support

The honest question for a dust-distribution program: which format covers more surface per kit, and more per dollar, for the job of finding settled lead dust across a home? The figures answer it without anyone needing to argue it.

What comes with the kit can matter as much as the kit

For a public program the support around the kit is part of the deliverable, not an extra. A single owner-operator can tailor this for one program and turn it around quickly, and can absorb more on cost for a public-health use than a larger company with more overhead.

Program-branded packaging

The packaging is built around the program, not the Fluoro-Spec brand: where to look for lead-based-paint dust, how to test, and the program's own contact and referral line. The example below was produced for another program, with that program's staff contact printed right on the bag. Your program's information and priorities go in that place. Examples can be sent for use in your bid documentation.

Front and back of a program-branded Fluoro-Spec bag produced for another program, with that program's contact printed on it.
A real example: the bag carries where-to-look guidance, how-to-test steps, and the other program's own staff contact, not Fluoro-Spec's.
An education screener that rides along

A short household-risk screener can ride along with each kit, on the packaging or as a QR code, so the giveaway carries a little prevention education with it. It is already built and live; it can be pointed at the program's own intake or follow-up path. Example of how it reads:

Example question
Was your home built before 1978?
Yes No Not sure
Followed by questions on windows, deteriorating paint, and young children, then a plain-language risk readout.

See the live screener

Refills, and a gallon refill scheme

Refill spray bottles are available at a lower cost than a full new kit, since the UV light is reused. There is also a one-gallon bottle with a pump. If a program collects returned kits, the bottles are refilled from the gallon and the lights are reused, and the effective cost per test drops substantially over a program's life. The same refilling supports interim-control monitoring, where a family keeping a hazard in check re-checks an area over time instead of waiting on a lab.

The one-gallon Fluoro-Spec lead test spray bottle with a pump, used to refill the small bottles.
The one-gallon refill bottle with pump. Refilling returned kits is how the per-test cost comes down over time.

Helpful references

If it would help before the funder deadline, a short call works too. The right configuration depends on how the program runs, and that is a quick conversation.

Eric Ritter, Fluoro-Spec Inc. · eric@fluorospect.com · 631-461-1838