Our chlorine test papers are based on the potassium iodide starch reaction. As such, many oxidizing species will cause the paper to turn purple. The iodide that is impregnated in the paper is oxidized to [...]
It is not advisable to use our chlorine test papers to measure chlorine concentrations made with non-regular bleach. Non-regular bleach will turn the test paper blue/purple, however, the bleach formula contains additives that influence the [...]
We have tested the blue litmus with multiple pH buffers. The blue paper is blue at pH 8. At pH 7, the sample is maybe just a little red. The real change to red seems [...]
All of our Peroxide test strips are suitable for detection of hydroperoxides and ether peroxides. Polymeric peroxides, which can form in diethylether, are not detected. Organic peroxides, such as di-terc-butyl peroxide, di-cumyl peroxide or terc-butyl [...]
If you are using the 345 chlorine books to measure chlorine levels, you should use the same chart as the 145 chlorine test papers.
The colors for the 10, 50, 100, 200 ppm chlorine will be the same progressively more purple color. Above 200 ppm the purple will intensify further to the point that it will appear almost black. [...]
Yes! It's called QAC QR5. Dip the test paper into the solution for 1 second, and wait 5-10 seconds before comparing to the color chart.
Yes, the cloths are reversible. As long as the cloth reverts back to the original goldenrod yellow color, it will continue to change when exposed to ammonia vapors. We aren’t certain of how many times [...]
Sulfites (Sulfur Dioxide) in wine are present in two forms – free and bound. The Sulfite test strips only detect free sulfite. The buffer agents on the test pad convert the free sulfur dioxide to [...]
It is not a good idea to dilute the sample with water. While this helps to avoid the color stain, dilution of the hydrogen ion concentration will change the pH. A better suggestion for measuring [...]