Hanna Instruments HI 3831F Manual de usuario

SPECIFICATIONS

Instruction Manual

www.hannainst.com

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 dam-

age, notify your Dealer or the nearest Hanna office

immediately.

Each kit is supplied with:

• 1 Color Comparator Cube;

• Reagent 1 (20 mL);

• Reagent 2 (15 mL).

Note: Any damaged or defective item must be returned in

its original packing materials.

ISTR3831FR1 10/01 PRINTED IN ITALY

HI 3831F

Free Chlorine

Test Kit

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 excessive

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 Free 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.

Range 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 176 g (6.6 oz.)

SPECIFICATIONS

SIGNIFICANCE AND USE

CHEMICAL REACTION

The addition of chlorine to water produces hydrochloric and

hypochlorous acids. The hypochlorous acid acts as the

disinfectant and bleaching agent. These are known as free

chlorine, which is measured by a colorimetric method. The

reaction is buffered at approximately 6.3 pH; in that

condition DPD (N,N-diethyl-p-phenylenediamine) is immedi-

ately oxidized by chlorine producing a reddish color. The

color intensity of the solution determines the free chlorine

concentration.

INSTRUCTIONS

READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT

• Add 5 drops of Reagent 1 and 3 drops of Reagent 2 to

the color comparator cube.

• Fill the color comparator cube with water 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 band best matches the solution in

the vessel and record the results in mg/L (ppm) free

chlorine.

REFERENCES

Standard Methods for the Examination of Water and Waste-

water, 18th Edition, 1992, pages 445-446.

The chemicals contained in this kit may be hazardous if

improperly handled. Read Health and Safety Data Sheet

before performing this test.

HEALTH AND SAFETY

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