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Free and Total Chlorine Test Kit

<center>Free and Total Chlorine Test Kit</center>

Free and Total Chlorine Test Kit
Chlorine in water may be present in two forms, free and total. Free chlorine does the hard work of killing bacteria and oxidizing contaminants. When you add chlorine to water, you are actually adding free chlorine. When the free chlorine combines with contaminants, it becomes combined chlorine, or chloramines. In water, this form of chlorine has very little sanitizing ability, and no oxidizing ability. Total chlorine is just the sum of both combined chlorine and free chlorine. This test is used to determine how much of the chlorine is being used to initially disinfect the water and how much residual chlorine is left. The residual chlorine needs to be in the water to insure no microbes will return before the water is used.

How to Use:

Free Chlorine Test
  1. Fill a viewing tube to the first (5-mL) line with sample water. This is the blank.
  2. Place this tube in the top left opening of the color comparator.
  3. Fill another viewing tube to the first (5-mL) line with sample water.
  4. Add the contents of one DPD Free Chlorine Reagent Powder Pillow to the second tube. Complete the test and
    read the result within one minute of the addition of the powder.
  5. Swirl to mix.
  6. Place the second tube in the top right opening of the color comparator.
  7. Hold comparator up to a light source such as the sky, a window or a lamp. Look through the openings in front.
  8. Rotate the color disc until the color matches in the two openings.
  9. Read the mg/L free chlorine in the scale window.



Total Chlorine Test
  1. Fill a viewing tube to the first (5-mL) line with sample water. This is the blank.
  2. Place this tube in the top left opening of the color comparator.
  3. Fill another viewing tube to the first (5-mL) line with sample water.
  4. Add the contents of one DPD Total Chlorine Reagent Powder Pillow to the second tube.
  5. Swirl to mix. Wait three minutes. The result of the test must be read within six minutes of the addition of the powder.
  6. Place the second tube in the top right opening of the color comparator.
  7. Hold comparator up to a light source such as the sky, a window or a lamp. Look through the openings in front.
  8. Rotate the color disc until the color matches in the two openings.
  9. Read the mg/L free chlorine in the scale window.

Manual



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