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Trial Number 5

Trial Purpose:

To evaluate effectiveness of the provided cleaners in regards to removing synthetic blood from stainless steel.

Date Run:

03/04/2020

Experiment Procedure:

Three pre-weighed stainless-steel coupons per cleaner were coated with synthetic blood using a swab and allowed to air dry (68 F) for 24 hours. Dirty weights were recorded before immersing coupons into the six cleaners provided by the company at the recommended temperature for three minutes. Coupons were rinsed three times in a de-ionized water bath for one minute and dried for 24 hours before recording the final weights.

Trial Results:

Table of Gravimetric Results

Cleaner Temperature (°F) Initial wt of cont. Final wt of cont. %Cont Removed % Average
CMA 140 0.0082 0.0001 98.78 89.44
0.0558 0.0085 84.77
0.0532 0.0081 84.77
CMB 140 0.0420 0.0080 80.95 91.93
0.0530 0.0001 99.81
0.0282 0.0014 95.04
CMC 140 0.0144 0.0006 95.83 97.77
0.0358 0.0004 98.88
0.0498 0.0007 98.59
CMD 68 (Room Temperature) 0.0871 0.0015 98.28 99.24
0.0562 0.0001 99.82
0.1044 0.0004 99.62
CME 68 (Room Temperature) 0.0868 0.0000 100.00 98.93
0.0621 0.0017 97.26
0.1700 0.0008 99.53

 Coupons that were cleaned using the CMD cleaner:

Success Rating:

A cleanliness study, addressing only various analytical techniques.

Conclusion:

All cleaners were effective in removing synthetic blood from stainless steel coupons. The cleaner, CMD, was most effective with an overall average removal of 99%. The results were confirmed with visual observations.

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