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Old 01/02/2018, 10:40 PM   #2628
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Join Date: Oct 2004
Location: Norwalk, CT
Posts: 774
Hello all. Been lurking for a long time - thanks for all the contributions along the way to this thread. I'm getting going on my CaRX after a year or so gathering dust beneath my work space.

Reactor: MTC Procal
Masterflex: 7550-30 | 40mL/min
CO2: bubble counter | 12psi at 4 seconds/bubble
pH monitored by APEX in line via the feed to the effluent chamber

I wanted to monitor how the pH varies in the reactor prior to starting to make sure my setup is in order.

I've set the bubble counter to cycle at a pH of 7.3. With that setting, pH swings from 7.31 down to 7.13.

This pH swing seems rather large. Should I be making adjustments to tighten this range? I'm considering starting at 6.9 but I do have zeomag loaded also. Just want to make sure I don't make mush before I get things going in earnest.

Thx in advance for the assist!!

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