Reading #1) on the glass of the knob
60-second reading
- Lead (Pb): 13,700 +/- 1,000 ppm
- Bromine (Br): 24 +/- 2 ppm
- Copper (Cu): 42 +/- 10 ppm
- Zinc (Zn): 34 +/- 6 ppm
- Indium (In): 17 +/- 3 ppm
- Tin (Sb): 17 +/- 4 ppm
- Antimony (Sb): 1,460 +/- 21 ppm
- Barium (Ba): 51+/- 14 ppm
- W: 142 +/- 21 ppm
Reading #2) on the yellow brass of the knob
60-second reading
- Lead (Pb): 19,400 +/- 200 ppm
- Cadmium (Cd): 18 +/- 11 ppm
- Iron (Fe): 2,340 +/- 65 ppm
- Nickel (Ni): 1,176 +/- 51 ppm
- Copper (Cu): 576,600 +/- 700 ppm
- Zinc (Zn): 394,600 +/- 700 ppm
- Titanium (Ti): 333 +/- 140 ppm
- Nb: 982 +/- 36 ppm
- Indium (In): 41 +/- 13 ppm
- Tin (Sb): 4,102 +/- 56 ppm
- Antimony (Sb): 92 +/- 23 ppm
- Bismuth (Bi): 258 +/- 65 ppm
How old is this doorknob? I contact nostalgic as I have their products in my house. They insisted the new knobs do NOT contain any lead. But I don’t know if I trust them (especially since their website said they do)
This is relatively new. Whenever the post was published (within a year of that).
T
I have these door knobs in my old house but they’re in copper, have you tested those by chance? I tested them with a 3M lead swab and they came back clean but I’m very nervous.