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Trial Number 2

Trial Purpose:

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

Date Run:

11/16/2016

Experiment Procedure:

hree pre-weighed coupons per cleaner were coated with 1 g of Glass 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 (Windex) 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 21.2 °C 21.7 °C 21.8 °C
Ozone Levels (in ppm & ORP mV)      
handheld meter (from spray bottle) ORP 402 mV 248 mV 274 mV
meter on machine (during filling) ORP 930 mV    
meter on machine 1.141 - 1.236 ppm    
vacu-vials (soln from hose) 0.89ppm    
vacu-vials (soln from spray bottle) 0.23 ppm 0.10 ppm 0.0 ppm
temp of water when made 68.1 °F    
pH of water when made 6.5    
tap water - ORP (handheld meter) 214 mV 242 mV 242 mV
tap water - temp (handheld meter) 20.0 °C 21.54 °C 21.5 °C
ozone in tap water (vacu-vials) 0.02 ppm    
Cleaner Initial wt Final wt % Removed
Clean Core Ozone soln, t- 0 hr      
Glass      
  0.0651 0.0018 97.24
  0.0571 0.0030 94.75
  0.0767 0.0081 89.44
Clean Core Ozone soln, t- 2 hr      
Glass      
  0.0624 0.0048 92.31
  0.0625 0.0068 89.12
  0.0596 0.0024 95.97
Clean Core Ozone soln, t- 4 hr      
Glass      
  0.0649 0.0103 84.13
  0.0535 0.0166 68.97
  0.0514 0.0050 90.27
Windex      
Glass      
  0.1629 0.0102 93.74
  0.1629 0.0082 94.97
  0.1225 0.0062 94.94
Clean Core Ozone soln, t- 0 hr      
Chrome      
  0.0607 0.0057 90.61
  0.0620 0.0023 96.29
  0.0561 0.0050 91.09
Clean Core Ozone soln, t- 2 hr      
Chrome      
  0.0558 0.0065 88.35
  0.0485 0.0009 98.14
  0.0513 0.0012 97.66
Clean Core Ozone soln, t- 4 hr      
Chrome      
  0.0531 0.0019 96.42
  0.0548 0.0008 98.54
  0.0556 0.0012 97.84
Windex      
Chrome      
  0.1056 0.0207 80.40
  0.1064 0.0149 86.00
  0.1063 0.0234 77.99
Glass Substrate        
CompanyName: Product Name Conc. % Efficiency Effective
CleanCore Aqueous Ozone 100% T= 0 hrs: 93.81  
      T= 2 hrs: 92.47  
      T = 4 hrs: 81.12 Yes
Formula 409 Multi-Surface 100% 94.55 Yes

Observations (if any):

CleanCore Visual: more streaking/filminess noted on coupons cleaned with CleanCore Aqueous Ozone as compared to coupons cleaned with Windex

Windex Visual: more bright clean (sparkling) areas noted on coupons cleaned with Windex as compared to the coupons cleaned with CleanCore Aqueous Ozone

Chrome Substrate        
CompanyName: Product Name Conc. % Efficiency Effective
CleanCore Aqueous Ozone 100% T= 0 hrs: 92.66  
      T= 2 hrs: 94.72  
      T = 4 hrs: 97.6 Yes
Formula 409 Multi-Surface 100% 81.46 No

Observations (if any):

CleanCore visual: more filming and streaking noted on coupons cleaned with CleanCore Aqueous Ozone

Windex Visual: less streaking and filming noted on coupons cleaned with Windex as compared to coupons cleaned with CleanCore Aqueous Ozone

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 glass substrate with glass soil, the CleanCore Aqueous Ozone Solution had a removal efficiency of 93.81% at T=0, as compared to the 94.55% for the Windex Cleaner. Visually, more bright clean (sparkling) areas were noted on coupons cleaned with Windex as compared to the coupons cleaned with CleanCore Aqueous Ozone.

For chrome substrate with glass soil, the CleanCore Aqueous Ozone Solution had a removal efficiency of 92.66% at T=0, as compared to the 81.46% for the Windex Cleaner. Visually, less streaking and filming was noted on coupons cleaned with Windex as compared to coupons cleaned with CleanCore Aqueous Ozone.

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