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
Removal
Cleaner
Initial wt
Final wt
% Removed
Clean Core Ozone soln, t- 0 hr
0.0651
0.0018
97.24
Glass
0.0571
0.0030
94.75
0.0767
0.0081
89.44
Clean Core Ozone soln, t- 2 hr
0.0624
0.0048
92.31
Glass
0.0625
0.0068
89.12
0.0596
0.0024
95.97
Clean Core Ozone soln, t- 4 hr
0.0649
0.0103
84.13
Glass
0.0535
0.0166
68.97
0.0514
0.0050
90.27
Windex
0.1629
0.0102
93.74
Glass
0.1629
0.0082
94.97
0.1225
0.0062
94.94
Clean Core Ozone soln, t- 0 hr
0.0607
0.0057
90.61
Chrome
0.0620
0.0023
96.29
0.0561
0.0050
91.09
Clean Core Ozone soln, t- 2 hr
0.0558
0.0065
88.35
Chrome
0.0485
0.0009
98.14
0.0513
0.0012
97.66
Clean Core Ozone soln, t- 4 hr
0.0531
0.0019
96.42
Chrome
0.0548
0.0008
98.54
0.0556
0.0012
97.84
Windex
0.1056
0.0207
80.40
Chrome
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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