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<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">Hi Sean,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">We had a similar problem with SiCl4 but in our case it was charged with nitrogen. On our system we were able to use the venturi on the gas panel to evacuate the N2 from the cylinder.
We ran several tests afterwards and we did not see any adverse effects in our process.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Feargal Nolan<o:p></o:p></p>
<p class="MsoNormal">Maintenance Manager<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="color:#6CABE7">Tyndall National Institute<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:#1F497D">Lee Maltings, Dyke Parade<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Cork, T12 R5CP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Ireland</span><span lang="EN-US" style="color:#1F497D"><br>
</span><b><span style="color:#6CABE7">t </span></b><span style="color:#1F497D">+353 21 234 6656</span><b><span style="color:#6CABE7"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="color:#6CABE7">m </span></b><span style="color:#1F497D">+353 87 635 7673</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> labnetwork-bounces@mtl.mit.edu [mailto:labnetwork-bounces@mtl.mit.edu]
<b>On Behalf Of </b>Rinehart, Sean<br>
<b>Sent:</b> 19 June 2019 18:15<br>
<b>To:</b> labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [labnetwork] Argon in a BCl3 cylinder<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hello all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Recently our facility’s BCl3 cylinder had been charged with argon, increasing the delivery pressure to 25 psi. The cause has been corrected, but now I’m evaluating whether or not the cylinder needs to be replaced, and
would appreciate some advice.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Since the root issue was fixed, the pressure has slowly dropped from 25 psi to 15 psi with use. Based on this, it seems like with more use the argon should completely deplete from the cylinder, but maybe someone can tell
me if that’s actually true, and if there’s a way to evaluate gas concentrations. Additionally, the plasma glow is whitish instead of pink, so there’s definitely BCl3 content in the delivered gas.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thank you,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Sean Rinehart<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Assistant Director, Cleanroom Operations<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Yale University<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">203 432 4303 <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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