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Trial Number 1

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, stainless steel, and painted steel substrates

Date Run:

11/18/2016

Experiment Procedure:

Three pre-weighed coupons per cleaner were coated with 0.5 g of DCC 17 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 (Formula 409 Multi-Surface Cleaner) instead of the ozonated solution, following the same process on the SLW machine and for drying and final weights.

Trial Results:

Results:      
Ozonated H2O t=0 hrs t=2 hrs t=4 hrs
Temperature 21.2 °C 22.6 °C 22.8 °C
Ozone Levels (in ppm & ORP mV)      
handheld meter (from spray bottle) ORP 365 mV 242 mV 233 mV
meter on machine (during filling) ORP 930 mV    
meter on machine 1.103 - 1.149 ppm    
vacu-vials (soln from hose) 0.76 ppm    
vacu-vials (soln from spray bottle) 0.19 ppm 0.03 ppm 0.02 ppm
temp of water when made 70.2 °F    
pH of water when made 6.5    
tap water - ORP (handheld meter) 262 mV 238 mV 242 mV
tap water - temp (handheld meter) 21.3 °C 22.4 °C 22.5 °C
ozone in tap water (vacu-vials) 0.04 ppm    
       
Cleaner Initial wt Final wt % Removed
Clean Core Ozone soln, t- 0 hr      
Ceramic      
  0.4972 0.0235 95.27
  0.5021 0.0169 96.63
  0.5118 0.0122 97.62
Clean Core Ozone soln, t- 2 hr      
Ceramic      
  0.5116 0.0837 83.64
  0.5058 0.0647 87.21
  0.5162 0.0422 91.82
Clean Core Ozone soln, t- 4 hr      
Ceramic      
  0.5151 0.0542 89.48
  0.4694 0.0555 88.18
  0.4901 0.0837 82.92
Formula 409 Multi-Surface Cleaner      
Ceramic      
  0.4927 0.0204 95.86
  0.4742 0.0316 93.34
  0.5046 0.0182 96.39
Clean Core Ozone soln, t- 0 hr      
Stainless Steel      
  0.4192 0.0271 93.54
  0.4435 0.023 94.81
  0.5346 0.0391 92.69
Clean Core Ozone soln, t- 2 hr      
Stainless Steel      
  0.4749 0.0183 96.15
  0.5285 0.0164 96.9
  0.4346 0.0198 95.44
Clean Core Ozone soln, t- 4 hr      
Stainless Steel      
  0.4643 0.0173 96.27
  0.444 0.0096 97.84
  0.5699 0.0167 97.07
Formula 409 Multi-Surface Cleaner      
Stainless Steel      
  0.4418 0.0085 98.08
  0.4796 0.0064 98.67
  0.5851 0.0079 98.65
Clean Core Ozone soln, t- 0 hr      
Painted Steel      
  0.4855 0.0314 93.53
  0.4243 0.014 96.7
  0.4811 0.0253 94.74
Clean Core Ozone soln, t- 2 hr      
Painted Steel      
  0.4497 0.0032 99.29
  0.5371 -0.0037 100.69
  0.4537 0.0097 97.86
Clean Core Ozone soln, t- 4 hr      
Painted Steel      
  0.5573 0.0366 93.43
  0.4715 0.0138 97.07
  0.4719 0.0332 92.96
Formula 409 Multi-Surface Cleaner      
Painted Steel      
  0.4912 0.0194 96.05
  0.4819 0.0303 93.71
  0.4476 0.0194 95.67
Ceramic Substrate        
CompanyName: Product Name Conc. % Efficiency Effective (% Efficiency ≥ 80%)
CleanCore Aqueous Ozone 100% T= 0 hrs: 96.51 %  
      T= 2 hrs: 87.56 %  
      T = 4 hrs: 86.86% Yes
Formula 409 Multi-Surface 100% 95.20% Yes

Observations (if any):

CleanCore Visual at T=0: appreciable quantity of soil removed

Formula 409 Visual: appreciable quantity of soil removed

Stainless Steel Substrate      
CompanyName: Product Name Conc. % Efficiency Effective
CleanCore Aqueous Ozone 100% T= 0 hrs: 93.68  
      T= 2 hrs: 96.16  
      T = 4 hrs: 97.06 Yes
Formula 409 Multi-Surface 100% 98.46 Yes

Observations (if any):

CleanCore Visual at T=0: more residual filming and streaking noted with coupons cleaned with CleanCore Aqueous Ozone as compared to those cleaned with Formula 409 Multi-Surface Cleaner

Formula 409 Visual: larger bright clean (shiny) surface area noted on coupons cleaned with Formula 409 Multi-Purpose Cleaner as compared to CleanCore Aqueous Ozone

Painted Steel Substrate        
CompanyName: Product Name Conc. % Efficiency Effective
CleanCore Aqueous Ozone 100% T= 0 hrs: 94.99  
      T= 2 hrs: 99.28  
      T = 4 hrs: 94.49 Yes
Formula 409 Multi-Surface 100% 995.14 Yes

Observations (if any): CleanCore Visual at T=0: m residual filming and streaking were comparable between coupons cleaned by the two cleaners

Success Rating:

A cleanliness study, addressing only various analytical techniques.

Conclusion:

For ceramic substrate with DCC 17 soil, the CleanCore Aqueous Ozone Solution had a removal efficiency of 96.51 % at T=0, as compared to the 95.20 % for the Formula 409 Multi-Surface Cleaner.

For stainless steel substrate with DCC 17 soil, the CleanCore Aqueous Ozone Solution had a removal efficiency of 93.68% at T=0, as compared to the 98.46 % for the Formula 409 Multi-Surface Cleaner. Visually, at T=0, more residual filming and streaking were noted with coupons cleaned with CleanCore Aqueous Ozone as compared to those cleaned with Formula 409 Multi-Surface Cleaner.

For painted steel substrate with DCC 17 soil, the CleanCore Aqueous Ozone Solution had a removal efficiency of 94.99% at T=0, as compared to the 95.14% for the Formula 409 Multi-Surface Cleaner. Visually, at T=0, residual filming and streaking were comparable between coupons cleaned by the two cleaners.

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