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Trial Number 0

Trial Purpose:

To evaluate CleanCore Aqueous Ozone solution (ozonated water) (at time = 0, 2 & 4 hrs) and a comparative cleaner on removal efficiency from ceramic and chrome substrates

Date Run:

11/22/2016

Experiment Procedure:

Three pre-weighed coupons per cleaner were coated with 1 g of Bathroom soil, at 68°F(room temperature), using a hand held swab. The contaminated coupons were air dried for 24 hours at 68°F (room temperature) and weighed again to determine the amount of soil added after the 24 hour period.

The CleanCore Aqueous Ozone kiosk machine was turned on and run to generate ozonated water. Ozonated water was collected into the CleanCore Spray Bottle.

Properties of tap water and the ozonated water (directly from the spray hose and the CleanCore Spray Bottle) were measured and recorded throughout the procedure, as necessary, including temperature, ORP values (mV), dissolved ozone levels (ppm), and pH.
Instrumentation used for measurements:
on-machine: dissolved ozone meter - ATi Q45H (ozone in ppm and temp in °F); ORP meter - Black Stone BL982411 ORP Controller (ORP in mV)
handheld instruments: Hanna HI 98121 meter (ORP & temp in °C); Chemetrics Meter with vacu-vials (dissolved ozone in ppm)

At the appropriate time interval, based on the age of the ozonated solution in the CleanCore Spray Bottle (t= 0 hr, t=2 hr, t=4 hr), three coupons of each substrate were placed in the SLW unit and a KC Wypal reinforced paper towel was attached to the cleaning sled and treated with one spray of cleaning solution from the CleanCore Spray Bottle. Each coupon was sprayed once with the same cleaning solution. The cleaning unit was run for 20 cycles (equivalent of 30 seconds of cleaning). Coupons were dried overnight and final weights were recorded. Efficiencies were calculated and recorded.

Three coupons of each substrate were also cleaned with a comparative cleaner (Lysol Power Bathroom Cleaner) instead of the ozonated solution, following the same process on the SLW machine and for drying and final weights.

Trial Results:

Ozonated H2O t=0 hrs t=2 hrs t=4 hrs
Temperature 23.7 °C 22.8 °C 19.8 °C
Ozone Levels (in ppm & ORP mV)      
handheld meter (ozonated soln from spray bottle) (ORP) 254 mV 224 mV 223 mV
meter on machine (during filling of spray bottle) ORP - 930 mV    
meter on machine 1.044 - 1.230 ppm  
vacu-vials (ozonated soln from fill hose) 0.85 ppm    
vacu-vials (ozonated soln from spray bottle) 0.21 ppm 0.05 ppm 0.01ppm
temp of water when made 73.8 °F - 74.0 °F    
pH of water when made 6.5    
tap water - ORP (handheld meter) 205 mV 211 mV 205 mV
tap water - temp (handheld meter) 24.0 °C 22.5 °C 21.0 °C
ozone in tap water (vacu-vials) 0.04 ppm    
Cleaner Substrate Coupon  Clean Wt  Dirty Wt Final Wt  % Removed % Average
Ozone t=0 hrs              
  Ceramic 13 81.2077 81.4510 81.2424 85.74 81.78
    24 82.7321 82.9770 82.7833 79.09  
    7 78.9031 79.1538 78.9520 80.49  
Ozone t = 2hrs              
    3 80.4009 80.6167 80.4408 81.51 73.16
    24 84.5556 84.8128 84.6362 68.66  
    4 85.9874 86.3007 86.0836 69.29  
Ozone t=4 hrs              
    12 81.2480 81.4485 81.3438 52.22 53.86
    20 81.6970 81.8790 81.7626 63.96  
    21 75.9327 76.1664 76.0603 45.40  
Lysol Power              
    16 76.3611 76.5441 76.4258 64.64 62.03
    88 78.4470 78.6981 78.5462 60.49  
    44 77.9398 78.1924 78.0384 60.97  
Ozone t=0 hrs              
  Chrome 23 21.6569 21.8973 21.7319 68.80 75.64
    24 21.7427 21.9867 21.7921 79.75  
    9 21.6567 21.9027 21.7099 78.37  
Ozone t = 2hrs              
    16 21.6806 22.0338 21.9261 30.49 44.58
    9 21.6328 22.0473 21.8225 54.23  
    13 21.7088 22.0446 21.8800 49.02  
Ozone t=4 hrs              
    19 21.6759 22.0332 21.9186 32.07 30.39
    22 27.2304 27.5551 27.4588 29.66  
    18 21.6080 21.8622 21.7874 29.43  
Lysol Power              
    6 21.6412 21.9569 21.8367 38.07 44.47
    3 21.4829 21.8186 21.6200 59.16  
    14 21.7242 22.0357 21.9230 36.18  
Ceramic Substrate        
CompanyName: Product Name Conc. % Efficiency Effective
      (% Efficiency≥ 80%)  
CleanCore Aqueous Ozone 100% T= 0 hrs: 81.78% Yes, at T= 0 hrs
      T= 2 hrs: 73.16 %  
      T = 4 hrs: 53.86%  
Lysol Power Bathroom 100% 62.03% No

Observations (if any: Visual at T=0: ceramic coupons looked appreciably cleaner compared to those cleaned with Lysol Power Bathroom Cleaner

Chrome Substrate        
CompanyName: Product Name Conc. % Efficiency Effective
      (% Efficiency≥ 80%)  
CleanCore Aqueous Ozone 100% T= 0 hrs: 75.64 No
      T= 2 hrs: 44.58  
      T = 4 hrs: 30.39  
Lysol Power Bathroom 100% 62.03% No

Observations (if any: Visual at T=0: ceramic coupons looked appreciably cleaner compared to those cleaned with Lysol Power Bathroom Cleaner

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

For ceramic substrate with bathroom soil, the CleanCore Aqueous Ozone Solution had a removal efficiency of 81.78% at T=0, as compared to the 62.03% for the Lysol Power Bathroom Cleaner. For chrome substrate with bathroom soil, the CleanCore Aqueous Ozone Solution had a removal efficiency of 75.64% at T=0, as compared to the 44.7% for the Lysol Power Bathroom Cleaner. Neither cleaner achieved the 80% benchmark.

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