Higher temps:
Testing was run on set of control solutions 0 – 50 – 100 – 200 – 400 ppm Hyamine 1622 (Fluka) warmed up to temperatures in the range 35 – 60oC.
| T (oC) | QAC strips reading in control solutions 0 – 50 – 100 – 200 – 400 ppm |
|---|---|
| 35 | reading OK in the whole concentration range |
| 40 | reading OK in the whole concentration range |
| 45 | 0 – 50 – 100 ppm OK, 200 and 400 ppm reading cca half color square higher |
| 50 | 50 – 100 ppm reading cca half color square higher, 200 – 400 ppm reading 1 color square higher |
| 55 | reading 1 color square higher in the whole range |
| 60 | reading 1 color square higher in the whole range |
Lower temps:
Testing was run on a set of control solutions at 100, 200, 300, and 400 ppm QAC using Oasis 146 stock.
The samples were split, so that one set was kept at room temp (76F) and one set was placed into the refrigerator (38F). Both the paper strips (SKU: 106) and the plastic backed test pads (SKU: QAC-400) were tested. The test papers showed no visual difference at any of the concentrations. The plastic backed strips did not show any visual difference, with the exception of the 100 ppm standard. The refrigerated standard read slightly lower (maybe ¼-½ a color unit, read as 50-75 ppm). The test was repeated several times and these results were confirmed.