HANNA instruments HI 3810 Manual
Contents
1. nstruction Manual HI 3310 Dissolved Oxygen Test Kit HANNA insirumenis www hannainst com Dear Customer Thank you for choosing a Hanna Product Please read the instrucions carefully before using the chemical test kit It will provide you with the necessary information for correct use of the kif Remove the chemical test kit from the packing material and examine if carefully to make sure that no damage has occurred during shipping If there is any noticeable dam age nofify your Dealer or the nearest Hanna office immediately de kit is supplied with e Manganous Sulphate Solution bottle with dropper 30 ml e Alkali Azide Reogeni 1 bottle with dropper 30 ml Acid Solution 2 bottles with dropper 60 ml Starch ndicafor 1 bottle with dropper 10 ml H13810 0 Reagent Titrant Solution 1 bottle 120 ml 1 glass stoppered bottle 1 calibrated vessel 10 ml 1 calibrated syringe with tip Note Any damaged or defective item must be returned in ifs original packing materials SPEC FICATIONS Range 0 to 10 mg l ppm 0 Smallest ncrement 0 1 mg l ppm 0 Analysis Method Azide Modification Titration Sample Size 5 ml Number of Tests 110 average Case Dimensions 1 260x120x60 mm 10 2x4 7x2 4 Shipping Weight 010 q 34 0 oz 07 05 STR3810R3 SIGNIFICANCE AND USE The concentration of dissolved oxygen in water is exiremely important in nature as well in man s environ2. GEN TEST KIT 1 2 3 4 Rinse x 3 47 yeud ns A m v z k l HI 3810 0 Titrant gt
3. lass bottle 3 times with water sample and fill fo overflow nsert stopper nd ensure that a small part of the sample spills over e Remove the stopper and add 5 drops each of Manganous Sulphate Solution and Alkali Azide Reagent pizv eyi BI AE e Add some more sample to fill the bottle completely Carefully stopper the bottle again and ensure that a part of the sample spills over This is to make sure that no air bubbles have been trapped inside which would corrupt the reading nvert several times the bottle The sample becomes orange yellow and a flocculent precipitate will form if oxygen is present e let the sample stand and the flocculent precipitate will start to settle After approximately 2 minutes when the upper half of the bottle becomes limpid add 10 drops of Sulphuric Acid Solution ez e Again stopper the bottle and invert it until l mn material is dissolved The sample is ready for measurement when it is yellow and completely limpid e Remove the cap from fhe plastic vessel Rinse the plastic vessel with the solution in the bottle fill to the T5 mL 5 ml mark and replace the cap Add 1 drop of Starch ndicafor through the cap port and mix by carefully swirling the vessel in tight cirdes The solution will turn a violet to blue color 10Je91pU UV IB e Push and twist pipet tip onto tapered e
4. ment n the oceans akes rivers and other surface water bodies dissolved owygen is essential to the growth and development of aguatic life Without oxygen fhe water can become toxic due to the ancerobic decaying of organic matter n man s environment water must contain at east 2 mg l of oxygen to profed water pipes from corrosion However boiler system water in many cases cannot contain greater than 10 mg l oxygen The Hanna Dissolved Oxygen Test Kit can defermine the oxygen concentration in water guickiy and easily The kit is portable and can be used in the field as well in the laboratory Note mg l is eguivalent to ppm parts per million CHEM CAL REACTION A modified Winkler method is used Manganous ions react with oxygen in the presence of potassium hydroxide to form a manganese oxide precipitate Step 1 An azide is present fo prevent any nitrite ions from inferlerinq with the test n addition of acid manganese oxide hydroxide oxidizes the iodide to iodine Step 2 Since the amount of iodine gener ated is eguivalent to the oxygen in the sample the concentration of iodine is calculated by titration of thiosul fate ions that reduce the iodine back to iodide ions Step 1 2Mn 0 40OH 2Mn0 OH Step 2 MnO OH 21 4H gt Min lt 1 30 Step 3 1 25 07 20 5 07 INSTRUCTI0NS READ ALL THE INSTRUCTIONS BEFORE USING THE TEST KIT LOOK AT THE BACK PAGE FOR THE ILLUSTRATED PROCEDURE e Rinsethe g
5. nd of syringe ensuring an dir tight fit Take the titration syringe and push the plunger completely into the syringe Insert tip info HI 3810 0 Titrant Solution and pull the plunger out until the lover edge of the plunger seal is on the ml mark of the syringe q e Place the syringe tip into the cap port of the plastic vessel and slovly add the titration solution dropwise swirling to mix after each drop Continue adding titration solution until the solution in the plastic vessel changes from blue to colorless e Read off the milliliters of titration solution from the syringe scale and multiply by 10 fo obtain mg l ppm oxygen e f results are ower than 5 mg L the precision of the test can be improved as follows Add an amount of unused sample in the glass bottle to the 10 ml mark of the plastic vessel e Proceed with the test as described before and multiply the values on the syringe scale by 5 fo obtain mg l oxygen in the sample Iloml REFERENCES 1987 Annual Book of ASTM Standard Volume 11 01 Water 1 pages 629 638 Official Methods of Analysis A 0 A C 14 Edition 1984 pages 620 621 Standard Methods for the Examination of Water and Waste water 16 Edition 1985 HEALTH AND SAFETY The chemicals contained in this test kit may be hazardous if improperly handled Read Health and Safety Data Sheets before performing the test HANNA insirumcnis HI 3810 DISSOLVED OXY
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