Hanna Instruments HI 38079 Instruction Manual

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instruction manual

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Instruction Manualwww.hannainst.comDear Customer,Thank you for choosing a Hanna Product.Please read the instruction sheet carefully before using thetest kit. It will provide you with the necessary informationfor correct use of the kit. If you need additional information,do not hesitate to e-mail us at tech@hannainst.com.Remove the test kit from the packing material and examineit carefully to make sure that no damage has occurredduring shipping. If there is any noticeable damage, notifyyour Dealer or the nearest Hanna office immediately.Each kit is supplied with:• Buffer Reagent, 1 bottle with dropper (25 mL);• Oxalate Reagent, powder (100 pcs);• HI 38079B-0 EDTA Solution, 1 bottle (120 mL);• Buffer Solution pH 10.2±0.2, 1 bottle (100 mL);• Calmagite Indicator, 1 bottle with dropper (10 mL);• Demineralizer Bottle with filter cap for about 12 litersof deionized water (depending on the hardness levelof water to be treated);• 1 calibrated plastic vessel (20 mL);• 2 calibrated plastic vessels (50 mL);• 1 large funnel;• filter paper discs ∅ 110 mm (100 pcs);• 1 plastic spoon;HI 38079MagnesiumTest Kit forIrrigation WaterISTR38079 09/00 PRINTED IN ITALYMagnesium is a common constituent of natural waters; itsaverage abundance in streams is 4 mg/L and in groundwatersis >5 mg/L. In concentration greater than 125 mg/L itcan cause diuretic effect. The aqueous species is often Mg2+and it does not normally result in precipitation (as dolomite)in natural waters. Magnesium is also an important con-tributor to the hardness of water: when heated, magnesiumsalts break down forming incrustation in boilers. Moreovermagnesium is necessary to plant metabolism since it is anessential constituent of organic molecules such as chlorophyll.By using the HI 38079 Hanna Test Kit, it is possible todifferentiate between calcium and magnesium, since the kitdetermines only the magnesium ions.Note: mg/L is equivalent to ppm (parts per million).SPECIFICATIONSSPECIFICATIONSSPECIFICATIONSSPECIFICATIONSSPECIFICATIONSSIGNIFICANCE AND USESIGNIFICANCE AND USESIGNIFICANCE AND USESIGNIFICANCE AND USESIGNIFICANCE AND USECHEMICAL REACTIONCHEMICAL REACTIONCHEMICAL REACTIONCHEMICAL REACTIONCHEMICAL REACTIONINSTRUCTIONSINSTRUCTIONSINSTRUCTIONSINSTRUCTIONSINSTRUCTIONSThe Hanna Test Kit determines Magnesium in irrigationwater via a titrimetric method. Calcium, if present, isremoved by prior filtration. Then the indicator chelates withmagnesium to form a red colored complex. As EDTA isadded, magnesium complexes with it: the reaction endpointis indicated by a change in color of the indicator from red toblue.READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT1- Remove the cap and fillthe Demineralizer Bottlewith tap water.2- Replace the capand shake for atleast 2 minutes.The demineralizedwater is nowready.3- Fill one of the large (50 mL)plastic vessels with 25 mL of wa-ter sample, up to the mark.4- Add 4 drops of Buffer Reagent and swirl to mix.5- Add 1 packet of HI 38079A-0 Oxalate reagent and mixfor 30 seconds by means of the plastic spoon. Somedeposits may remain, but they do not affect the mea-surement.6- Wait for about 5 minutes for thereaction to complete. If Calcium ispresent, the solution will become tur-bid.Range 0 to 240 mg/L (ppm) as Mg (MR)0 to 725 mg/L (ppm) as Mg (HR)Smallest Increment ±2.4 mg/L as Mg (MR)±7.3 mg/L as Mg (HR)Analysis Method TitrationSample Size 25 mLNumber of Tests 100 (average)Case Dimensions 235x175x115 mm (9.2x6.9x4.5")Shipping Weight 873 g (30.8 oz.)7- Fold a filter paper disc twice as shown in the figure.8- Separate one side from the otherthree to form a cone.9- Place the folded filter disc in thefunnel. Place the funnel over theother large plastic vessel.10- Pour the reacted wa-ter sample throughthe filter paper.11- Using the 3 mL plastic pipette, carefullytransfer 3 mL of the filtered clear watersample into the small (20 mL) plasticvessel.12- Flip open the top of the Dem-ineralizer Bottle cap. By gentlysqueezing the bottle, add dem-ineralized water to the vesselup to the 10 mL mark.13- Using the 1 mL plastic pipette, add 1 mL of BufferSolution 10.2±0.2 and swirl to mix.• 1 plastic pipette (1 mL);• 1 plastic pipette (3 mL);• 1 syringe (1 mL) with tip.Note: Any damaged or defective item must be returned inits original packing materials.25 mL10 mL

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