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Date: | Wed, 30 May 2007 07:41:39 -0700 |
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Ioan: I have used a solution of sodium rhodizonate. It's made up at 0.2%
BW in a slightly acid(pH 2-3)buffer solution. You can soak the swab in
this and apply to the test sample.
If lead is present it will form a reddish color. This is a qualitative,
not a quantitative test.
Regards
Michael Barmuta
Staff Engineer
Fluke Corp.
Everett WA
425-446-6076
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: Wednesday, May 30, 2007 7:07 AM
To: [log in to unmask]
Subject: [TN] Lead test kits
Dear everybody,
I am looking for those handy quick lead testing kits, cotton swab that
turns red or purple if the lead is there. I find a large variety and a
whole lotta suppliers, with prices between 19 and 25$.
I find it very expensive to spend about 20$ for 8 cotton swabs, so maybe
the chemists around here can advise on whether I can do something
in-house, like buying the chemical substance (sodium sulfide?) only.
Thanks,
Ioan
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