<html><head></head><body><div>Dear Labnetwork,</div><div><br></div><div>I need to check if a vertical furnace in Taiwan is contaminated with Arsenic or not.</div><div>The furnace is described a P-Doped Poly configured, but a suspicion has been raised that the furnace may have previously been used for As-Doped Poly.</div><div><br></div><div>We decided the best method will be swab test and then analyse the swabs with XRF or ICPMS.</div><div>My opinion is that this is ultimately going to be more accurate than using a hand-held XRF gun.</div><div><br></div><div>Does anyone have any experience of testing a vertical furnace for such trace contaminants ?</div><div><br></div><div>What I need to know is where to take the swabs. We should probably be testing in places where contaminants are likely to accumulate during operation of the furnace.</div><div><br></div><div>NB The furnace is de-installed and warehoused.</div><div><br></div><div>If any members of your knowledgeable network can give me their opinions about this, that would be very helpful.</div><div><br></div><div>
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Yours sincerely,<br>
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Stephen Howe <br>
Company Owner<br>
SDI
Fabsurplus Group<br>
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