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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:
11/18/2016Experiment 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:
Operating Conditions: | |||
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 |
Removal
Cleaner | Initial wt | Final wt | % Removed |
Clean Core Ozone soln, t- 0 hr | 0.4972 | 0.0235 | 95.27 |
Ceramic | 0.5021 | 0.0169 | 96.63 |
0.5118 | 0.0122 | 97.62 | |
Clean Core Ozone soln, t- 2 hr | 0.5116 | 0.0837 | 83.64 |
Ceramic | 0.5058 | 0.0647 | 87.21 |
0.5162 | 0.0422 | 91.82 | |
Clean Core Ozone soln, t- 4 hr | 0.5151 | 0.0542 | 89.48 |
Ceramic | 0.4694 | 0.0555 | 88.18 |
0.4901 | 0.0837 | 82.92 | |
Formula 409 Multi-Surface Cleaner | 0.4927 | 0.0204 | 95.86 |
Ceramic | 0.4742 | 0.0316 | 93.34 |
0.5046 | 0.0182 | 96.39 | |
Clean Core Ozone soln, t- 0 hr | 0.4192 | 0.0271 | 93.54 |
Stainless Steel | 0.4435 | 0.023 | 94.81 |
0.5346 | 0.0391 | 92.69 | |
Clean Core Ozone soln, t- 2 hr | 0.4749 | 0.0183 | 96.15 |
Stainless Steel | 0.5285 | 0.0164 | 96.90 |
0.4346 | 0.0198 | 95.44 | |
Clean Core Ozone soln, t- 4 hr | 0.4643 | 0.0173 | 96.27 |
Stainless Steel | 0.4440 | 0.0096 | 97.84 |
0.5699 | 0.0167 | 97.07 | |
Formula 409 Multi-Surface Cleaner | 0.4418 | 0.0085 | 98.08 |
Stainless Steel | 0.4796 | 0.0064 | 98.67 |
0.5851 | 0.0079 | 98.65 | |
Clean Core Ozone soln, t- 0 hr | 0.4855 | 0.0314 | 93.53 |
Painted Steel | 0.4243 | 0.0140 | 96.70 |
0.4811 | 0.0253 | 94.74 | |
Clean Core Ozone soln, t- 2 hr | 0.4497 | 0.0032 | 99.29 |
Painted Steel | 0.5371 | -0.0037 | 100.69 |
0.4537 | 0.0097 | 97.86 | |
Clean Core Ozone soln, t- 4 hr | 0.5573 | 0.0366 | 93.43 |
Painted Steel | 0.4715 | 0.0138 | 97.07 |
0.4719 | 0.0332 | 92.96 | |
Formula 409 Multi-Surface Cleaner | 0.4912 | 0.0194 | 96.05 |
Painted Steel | 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
Stainless Steel Substrate
Formula 409 Visual: appreciable quantity of soil removed
Company Name: | 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.