Modern glass door knob. Glass is Lead-free (yay!) Back plate is positive for 2,347 ppm Lead.

Given the lack of interaction with the back plate on this knob set, I think this is likely a good choice given the options out there (even though it is not 100% Lead-free).

Glass of knob
60-second reading

• Barium (Ba): 3,148 +/- 613 ppm
• No other metals were detected in the glass.

Metal base of knob
3-minute reading

• Lead (Pb): 2,347 +/- 670 ppm
• Antimony (Sb): 170 +/- 85 ppm
• Selenium (Se): 34,000 +/- 2,500 ppm

Tin (Sn): 3,990 +/- 320 ppm

• Zinc (Zn): 244,800 +/- 17,000 ppm
• Copper (Cu): 577,200 +/- 40,000 ppm
• Nickel (Ni): 1,457 +/- 161 ppm
• Iron (Fe): 2,263 +/- 232 ppm
• Bismuth (Bi): 1,487 +/- 255 ppm
• Chlorine (Cl): 4,668 +/- 1,649 ppm