The biohack.me forums were originally run on Vanilla and ran from January 2011 to July 2024. They are preserved here as a read-only archive. If you had an account on the forums and are in the archive and wish to have either your posts anonymized or removed entirely, email us and let us know.
While we are no longer running Vanilla, Patreon badges are still being awarded, and shoutout forum posts are being created, because this is done directly in the database via an automated task.
testing for dangerous heavy metal and other unwanted things.
Would this be suitable for testing Borosilicate for lead and is there anything else I should be testing for?
https://shop.resene.co.nz/resene-lead-paint-test-kit-small
This is the glass I am looking at getting to test with https://www.amazon.com/Pack-Glass-Tubing-Borosilicate-Mixed/dp/B017ALRJJQ/ref=sr_1_7?ie=UTF8&qid=1537852566&sr=8-7&keywords=borosilicate+tubes#customerReviews
Comments
-
Well, im doing some tests now. I'll tell you how I'm doing it and maybe someone will have a suggestion. I'm using a sodium sulfide solution. Its @ 0.5 percent. Im starting with an immersion test.. Just drop the glass in and see how it goes. But I'm not 100 percent that this is good enough for glass, so I'm also going to soak another set of vials in a 10 percent acetic acid solution for a few weeks and then add the sodium sulfide solution. In theory, the acetic will extract some of the lead out of the glass. I'm not sure if this method will work. Fortunately ive got some leaded glass as a positive control.
-
@Cassox What was the molar concentration of the solution?
-
Something like 6.4mM
-
@cassox would something closer to 0.1 M be better to test with?
https://www.flinnsci.com/sodium-sulfide-solution-0.1-m-500-ml/s0252/
-
Perhaps? Maybe i calculated the molar concentrate incorrectly?
Im using the mean value reported in NISTIR 6398: Spot Test Kits For Detecting Lead In Household Paint: A Laboratory Evaluation.
The values were reported in percent concentration rather then mole. The mean was 0.51g per 100ml. I got a molar weight of 78.0452 g per mol. From that i got 65.34675 mM.
