To determine the recommended bleach concentration for your application, locate the EPA registration number on your product label. Visit the EPA's website, and enter the EPA Registration Number, then click Search. You should see the details about the [...]
Each printing of color charts is preceded by an extensive review of the test strip performance. Chlorine standards are generated at 10, 50, 100, and 200ppm. These values are confirmed by at least one independent [...]
Temperature will slightly affect the performance. The 145 chlorine test papers (0-200ppm) have been checked in solutions up to 70°C (158°F). At temperatures above 50°C, a 10ppm solution will not develop as much color as [...]
Chlorine is one of the most popular chemicals for cleaning, sanitizing, and disinfecting. Two common examples will help illustrate this. Swimming pools are often treated with chlorine chemicals. In this application, the amount of chlorine [...]
There are many online calculators that can help with this. A general rule of thumb is that 1 tablespoon of bleach in 1 gallon of water will yield a solution that is approximately 200 ppm [...]
The chlorine test paper will darken over time, so it is best to compare the color as directed (immediately after dipping into solution). Also, be aware that if two strips are stuck together, the color [...]
All available chlorine has some biocide strength, although hypochlorous acid is a far stronger biocide than hypochlorite ion or the chloramines. In solutions at pH of 5-7, hypochlorous acid is the most prevalent species. For [...]
When chlorine gas (Cl2) or bleach (sodium hypochlorite or NaOCl) is added to water the result is the formation of hypochlorous acid (HClO). Cl2 + H2O -> HOCl + H+ + Cl- NaOCl +H2O -> [...]
Although you should determine what is an acceptable level of bacteria for your unique system, a general guide would be less than 105-106 CFU/ml for cooling water and less than 106-107 CFU/ml for metalworking fluid.
The Nutrient-TTC agar color is normally light yellow when the agar is cast. After testing, during the incubation phase, the agar may change to a light green color. This color change is a result of [...]