User manual HANNA INSTRUMENTS HI 38078

[. . . ] Instruction Manual SPECIFICATIONS Range Smallest Increment Analysis Method Sample Size Number of Tests Case Dimensions Shipping Weight > 0 meq/L 0. 5 meq/L for 1. 0 mL sample 0. 2 meq/L for 2. 5 mL sample Titration 1. 0 mL or 2. 5 mL 100 (average) 235x175x115 mm (9. 2x6. 9x4. 5") 785 g (27. 7 oz. ) DETERMINATION OF CALCIUM AND MAGNESIUM CHEMICAL REACTION Calcium and Magnesium in irrigation water are determined via a titrimetric method: the indicator chelates with the Calcium and Magnesium ions to form a red colored complex. As EDTA is added, calcium and magnesium complex with it: the reaction end point is indicated by a change in color of the indicator from red to blue. · Using the syringe, add 1 mL of Buffer Solution and swirl to mix. HI 38078 Sodium Adsorption Ratio (SAR) Test Kit 1 mL SIGNIFICANCE AND USE Sodium is one of the most studied elements because of its toxic effects both to soil texture and crops: · High concentration of sodium disperses soil colloidal particles, rendering the soil hard and resistant to water penetration. [. . . ] If you need additional information, do not hesitate to e-mail us at tech@hannainst. com. 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. Each kit is supplied with: · DiST 4 conductivity tester (with instructions and screwdriver for calibration); · HI 70039 calibration sachet 5000 µS/cm, 2 sachets; · Buffer Solution pH 10. 2±0. 2, 1 bottle (100 mL); · Calmagite Indicator, 1 bottle with dropper (10 mL); · HI 38078-0 EDTA Solution, 1 bottle (120 mL); · Demineralizer Bottle with filter cap for about 12 liters of deionized water (depending on the hardness level of water to be treated); · 1 calibrated vessel (50 mL); · 1 plastic pipette (3 mL); · 1 plastic pipette (1 mL); · 1 syringe (1 mL) with tip. · Replace the cap and shake for at least 2 minutes. · Determine the conductivity of your sample using the Hanna DiST 4 Conductivity Tester (for accurate results, follow the DiST 4 instructions attentively): - if the conductivity is < 2. 00 mS/cm, take 2. 5 mL of water sample; - if the conductivity is > 2. 00 mS/cm, take 1. 0 mL of water sample. · Using the 1 mL plastic pipette, add drops of HI 38078-0 EDTA Solution. Swirl after each drop and keep an accurate count of the number of drops being added to the solution. INSTRUCTIONS READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT DETERMINATION OF CONDUCTIVITY The concentration of total soluble salts dissolved in irrigation water is measured as the capacity to conduct electricity (EC) and is determined with a conductivity tester. Refer to the enclosed instructions for a proper use of the DiST 4 Conductivity Tester. Calculate the meq/L of soluble salts by multiplying the conductivity mS/cm by 10. PRINTED IN ITALY · Use the 3 mL plastic pipette and transfer 2. 5 mL or 1. 0 mL of your sample (see above) to the vessel. · Flip open the top of the Demineralizer Bottle cap. Squeeze the bottle gently to add demineralized water to the vessel up to the 25 mL mark. · As the color changes from pink to purple, swirl for 15 seconds after each additional drop, until the solution turns pure blue. Record the number of drops needed to obtain the final color change (from wine red to pure blue). Note: high amounts of copper in your sample will alter the final end point color. [. . . ] Read the relevant Health and Safety Data Sheet before performing this test. PERMEABILITY HAZARD TABLE It is possible to draw general indications about the permeability hazards in relation to ECw and SAR of the irrigation water tested [from Ayers and Westcot, FAO#29, Rev. 1, Rome, 1985]. Note: ECw is the electrical conductivity of the irrigation water and can be expressed as mS/cm (or dS/m) @25°C. [. . . ]