[labnetwork] Argon in a BCl3 cylinder

[Rinehart, Sean]

Hello all,

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.

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.

Thank you,

Sean Rinehart
Assistant Director, Cleanroom Operations
Yale University
203 432 4303

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