Free Chlorine Vs Total Chlorine Vs Combined Chlorine. Chloramines are also known as combined chlorine. Free chlorine is the chlorine that is present to kill microorganisms, while total chlorine is free chlorine plus the combined chlorine.
So, if the free and total chlorine levels are identical, that means there isn’t a presence of combined chlorine in your swimming pool. You can measure chlorine levels, using a test strip or a test kit, where the strip or a water sample will change color depending on the amount of chlorine you have in your pool. You can purchase an inexpensive kit to give you direct readings.
So if you want to get a measurement for combined chlorine, you first have to figure out values for total and free chlorine.
However, these acids can also react as oxidants, especially with lead, which increases the. When ammonia or organic nitrogen is also present, chloramines known as monochloramine, dichloramine, and trichloramine will quickly form. Combined chlorine is measured by calculating the difference between the total chlorine and the free chlorine. While it’s still in the water, its ability to sanitize is reduced compared to free chlorine.