HANNA instruments HI 38022 Total Chlorine High Range Test Kit Instruction Manual
- June 4, 2024
- HANNA instruments
Table of Contents
HANNA instruments HI 38022 Total Chlorine High Range Test Kit
INTRODUCTION
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. If you need additional
technical information, do not hesitate to e-mail us at
tech@hannainst.com or view our worldwide contact
list at www.hannainst.com.
Each kit is supplied with:
- HI 38000A-0 Sulfate Reagent, packets (100 pcs);
- HI 38000B-0 Sulfate Reagent, 1 bottle (53 g);
- Complexing Agent, 1 bottle with dropper (15 mL);
- 1 glass test tube (50 mL);
- 1 plastic vessel (50 mL);
- 1 plastic pipette (3 mL);
- 1 spoon.
SPECIFICATIONS
- Range 10 to 200 mg/L (ppm) as Chlorine
- Smallest Increment 10 mg/L as Chlorine
- Analysis Method Drop count titration
- Sample Size 1 mL
- Number of Tests 100
- Case Dimensions 235x175x115 mm (9.2×6.9×4.5″)
- Shipping Weight 547 g (19.3 oz.)
SIGNIFICANCE AND USE
The chlorination of water supplies and polluted waters is used mainly to
destroy or deactivate disease-producing microorganisms. It also serves to
improve the quality of drinking waters, as chlorine reacts with ammonia, iron,
manganese, sulfide and some organic substances. Nevertheless, high amounts of
chlorine will produce adverse effects, like the formation of compounds that
are potentially carcinogenic (e.g. chloroform) or harmful to aquatic life
(e.g. chloramines). Thus it is essential to control that the proper amount of
chlorine has been added in order to fulfill the primary purpose of
disinfecting and to minimize any adverse effect.
Note: mg/L is equivalent to ppm (parts per million).
CHEMICAL REACTION
An iodometric titration method is used. The water sample is treated with
potassium iodide and strongly acidified with acid. The amount of iodine
generated is equivalent to the chlorine in the sample; the concentration of
iodine is calculated by titration with thiosulfate ions that reduce iodine
back to iodide ions.
INSTRUCTIONS
READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
- Using the 3 mL plastic pipette, fill the small (20 mL) vessel with water sample up to the 10 mL mark.
- Add 5 drops of Potassium Iodide Solution and swirl gently to mix.
- Add 1 packet of Sulfamic Reagent. Use the spoon to mix and dissolve.
- Add 1 drop of Starch Indicator and swirl gently to mix. If chlorine is present, the solution will turn a blue color.
- Using the 1 mL plastic pipette, add Thiosulfate Reagent drop by drop, swirling after each drop, while keeping an accurate count of the drops being added to the solution.
- Continue adding Thiosulfate Reagent until the solution changes from blue to colorless.
- The concentration in mg/L (or ppm) of total chlorine in your sample is equal to the number of drops of Thiosul fate Reagent used to turn the solution colorless.
- If the result is lower than 4 ppm, the precision of test can be improved as follows.
- Fill the large (50 mL) plastic vessel with water sample up to the 50 mL mark; use the 3 mL pipette to adjust the sample level so that the meniscus formed on the walls of the vessel is exactly on the 50 mL mark.
- Add 5 drops of Potassium Iodide Solution and swirl gently to mix.
- Add 1 packet of Sulfamic Acid Reagent and use the spoon to mix and dissolve.
- Add 4 drops of Starch Indicator and swirl gently to mix. If chlorine is present, the solution will turn a blue color.
- Using the 1 mL plastic pipette, add Thiosulfate Reagent drop by drop, swirling after each drop, while keeping an accurate count of the drops being added to the solution.
- Continue adding Thiosulfate Reagent until the solution changes from blue to colorless.
- To obtain the concentration in mg/L (or ppm) of total chlorine in your sample, multiply by 0.2 the number of drops of Thiosulfate Reagent used to turn the solution from blue to colorless
REFERENCES
Standard methods for the Examination of Water and Wastewater, 20th Ed., 1998, APHA-AWWA-WEF
HEALTH AND SAFETY
The chemicals contained in this kit may be hazardous if improperly handled.
Read the relevant Health and Safety Data Sheet before performing this test.
References
Read User Manual Online (PDF format)
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