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Solujet Cooler 2105 E1398252141337
Published: June 2, 2014
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Q. How can I use conductivity to measure the concentration of a Solujet solution in order to control the concentration in a medical device cleaning bath?

A. In cleaning machines that have sumps or baths that are used repeatedly for cleaning where there will be dragout of solution on the parts being cleaned, evaporation of water, make-up water being added, and possibly dilution with rinse water, the cleaner concentration will constantly be changing as the solution is altered by any of these mechanisms.

One way to control this is to monitor the conductivity of the solution which will allow you to determine the concentration of Solujet™ Low-Foaming Phosphate-Free Liquid present which in turn will allow you to determine how much Solujet cleaner to add to bring the solution back up to full cleaning strength.

For example the conductivity of a Solujet solution at 22 deg C for weight/weight percent  is as follows: 0.125% = 0.64 mS; 0.25% = 1.26 mS; 0.5% = 2.45 mS; 1% = 4.85 mS; 2% = 9.2 mS; and 4% = 17.9 mS. You can contact Alconox Inc. at cleaning@ alconox.com to get a copy of an excel spreadsheet with this data in it along with a graph for interpreting results.

Generally speaking, this control via conductivity measurement can apply to any of our detergents used in cleaning baths.

To test Solujet detergent or any Alconox, Inc. detergent for free, please complete the questionnaire at Get Sample. For additional technical information on cleaning validation, please Download our Medical Device Cleaning Validation References PDF.  And if you have a question for our experts about critical cleaning, please visit Ask Alconox.

 

For fastest reply, please email cleaning@alconox.com

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