User manual HANNA INSTRUMENTS HI 38022

[. . . ] Instruction Manual SPECIFICATIONS Range Smallest Increment Analysis Method Sample Size Number of Tests Case Dimensions Shipping Weight 0 to 4. 0 mg/L (ppm) as Chlorine 0 to 20. 0 mg/L (ppm) as Chlorine 0. 2 mg/L in the 0-4. 0 range 1. 0 mg/L in the 0-20. 0 range Drop count titration 10 mL and 50 mL 100 235x175x115 mm (9. 2x6. 9x4. 5") 561 g (19. 8 oz. ) 2- Add 5 drops of Potassium Iodide Solution and swirl gently to mix. fate Reagent used to turn the solution colorless. drops x 1 = mg/L Total Chlorine 8- If the result is lower than 4 ppm, the precision of test can be improved as follows. 9- 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. HI 38022 Total Chlorine High Range Test Kit 3- Add 1 packet of Sulfamic Reagent. [. . . ] Each kit is supplied with: · Potassium Iodide Solution, 1 bottle with dropper (30 mL); · Sulfamic Reagent, packets (100 pcs); · Starch Indicator, 1 bottle with dropper (25 mL); · Thiosulfate Reagent, 1 bottle (100 mL); · 1 calibrated plastic vessel (50 mL); · 1 calibrated plastic vessel (20 mL); · 1 plastic pipette (3 mL); · 1 plastic pipette (1 mL); · 1 spoon. Note: Any damaged or defective item must be returned in its original packing materials. 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 formation of compounds which are potentially carcinogenic (e. g. chloroform) or harmful to aquatic life (e. g. 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). 4- Add 1 drop of Starch Indicator and swirl gently to mix. If chlorine is present, the solution will turn a blue color. 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. 5- 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. 10- Add 5 drops of Potassium Iodide Solution and swirl gently to mix. 11- Add 1 packet of Sulfamic Acid Reagent and use the spoon to mix and dissolve. 12- Add 4 drops of Starch Indicator and swirl gently to mix. [. . . ] 7- The concentration in mg/L (or ppm) of total chlorine in your sample is equal to the number of drops of Thiosul- INSTRUCTIONS READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT 1- Using the 3 mL plastic pipette, fill the small (20 mL) vessel with water 10 mL sample up to the 10 mL mark. 12/00 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. ISTR38022 [. . . ]