To evaluate resubmitted product for calcium removal
Date Run:
09/08/2005
Experiment Procedure:
Several marble chips of similar size and shape were weighed to determine the baseline weight of each piece. The selected chips were then immersed in the supplied product at full strength and allowed to sit overnight. After soaking at room temperature for 18 hours, the marble chips were removed from the products and rinsed in a tap water spray at 120 F for 30 seconds remove loose material from the chips. Then the chips were dried for 15 minutes using a Master Appliance Heat gun at 300 F. When the chips cooled to room temperature, final weights were recorded to determine weight loss, if any. Observations were made and photographs were taken after the initial immersion of the chips into solutions (5 minutes), at 60 minutes and then following the overnight immersion.
Trial Results:
From visual observations the supplied solution appeared to effect the marble chips. During the soak, the supplied solution started to bubble. This bubbling was only slightly more vigorous after 60 minutes of soaking. The solutions did not overflow the beaker overnight. The photos of the beakers show the status at 5 minutes, 1 hour and 18 hours. In addition to the beakers, there are photographs showing the baseline marble chips, the 18 hour soaks for DFC 5. DFC 5 resulted in more than 5% loss in weight after soaking. The table lists the initial weight, final weight and weight change for each marble chip soaked.
Product
Initial wt
Final wt
% Wt loss
DFC 5
9.3674
8.8369
5.66
18.3851
18.0034
2.08
23.9956
23.1971
3.33
26.6094
25.3621
4.69
Success Rating:
A follow up test, usually based on company input.
Conclusion:
The weight loss was signified the dissolving of calcium from the marble chips.
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