Instruction Manual
HI 3831T
Total Chlorine
Test Kit
Dear Customer,
Thank you for choosing a Hanna Product.
Please read the instructions carefully before using the chemical
test kit. It will provide you with the necessary information for
correct use of the kit.
Remove the chemical test kit from the packing material and
examine it carefully to make sure that no damage has
occurred during shipping. If there is any noticeable damage,
notify your Dealer or the nearest Hanna office immediately.
Each kit is supplied with:
• 1 Color Comparator Cube;
• Chlorine Reagent 1 (20 mL);
• Chlorine Reagent 2 (15 mL);
• Chlorine Reagent 3 (15 mL).
Note: Any damaged or defective item must be returned in its
original packing materials.
In pools and drinking water supplies, chlorination serves to
kill or deactivate disease-producing microorganisms. It can
also improve water quality by reacting with ammonia, iron,
sulfide and some organic substances. However, an excess
concentration of chlorine in water can produce adverse
conditions, such as formation of carcinogenic chloroform or
other toxins. To maximize the purpose for chlorination and
minimize any adverse effects, it is essential to monitor the
chlorine levels closely.
The Hanna Chlorine Test Kit determines the Total Chlorine
concentration in water via a color cube. This makes the test
kit practical for field use. No iodine or bromine can be
present for this test to work properly.
The addition of chlorine to water produces hydrochloric and
hypochlorous acids. The hypochlorous acid acts as the
disinfectant and bleaching agent. The formation of chloramines
and nitrogen trichloride will occur if ammonia is present.
These are known as bound chlorine. Total chlorine is measured
by a colorimetric method.
The reaction if buffered at approx. 6.3 pH; in presence of an
excessive quantity of iodide ions, the DPD (N,N-diethyl-p-
phenylenediamine) is oxidized by chlorine producing a reddish
color. The color intensity of the solution determines the total
chlorine concentration.
READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
• Add 5 drops of Chlorine Reagent 1, 2 drops of Chlorine
Reagent 3 and 3 drops of Chlorine Reagent 2 to the
color comparator cube.
Standard Methods for the Examination of Water and
Wastewater, 20th Edition, 1998.
Range 0.0 to 2.5 mg/L (ppm) Chlorine
Smallest Increment 0.5 mg/L (ppm) Chlorine
Analysis Method Colorimetric
Sample Size 5 mL
Number of Tests 50 (average)
Case Dimensions 220x145x55 mm (8.7x5.7x2.1")
Shipping Weight 205 g (7.7 oz.)
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
www.hannainst.com
ISTR3831TR2 01/07
The chemicals contained in this kit may be hazardous if
improperly handled. Read the relevant Safety Data Sheet
before performing this test.
Safety Data Sheets
Accessories
HI 3831T-050 replacement kit (50 tests)
HI 3831-99 color comparator cube for chlorine kit
HI 740032P cap for 20 ml plastic beaker (10 pcs)
HI 740037P 20 ml plastic beaker (10 pcs)
ReferencesSpecifications
Significance and Use
Chemical Reaction
Instructions
• Fill the color comparator
cube with sample to the 5
mL mark.
• Replace the cap and mix by
carefully swirling the cube
in tight circles and inverting
it several times.
• Determine which color
matches the solution in the
vessel and record the results
in mg/L (ppm) total
chlorine.
BOUND CHLORINE
The concentration of bound chlorine in the sample is
determined by subtracting the Free Chlorine (HI 3831F)
result from the Total Chlorine result (HI 3831T).
