User manual HANNA INSTRUMENTS HI 38083

[. . . ] SAMPLING 1) Soil Sample Extraction ­ Within a large homogeneous area, take 1 or 2 samples per 1000 m2 (0. 25 acre). ­ Even for smaller areas, 2 samples are recommended (the more samples, the better the end-results, because the end sample is more representative). ­ For a small garden or plot, 1 sample is sufficient. [. . . ] · Flip open the top of the Demineralizer Bottle cap. By gently squeezing the bottle, add demineralized water to the large (50 mL) test tube up to the 25 mL mark. www. hannainst. com ISTR38083 Dear Customer, Thank you for choosing a Hanna Product. Please read the instruction sheet carefully before using the test kit. It will provide you with the necessary information for correct use of the kit. 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: · HI 38083A-0 Calcium Sulfate, 1 bottle (10 g); · Buffer Solution 10. 2±0. 2, 1 bottle with dropper (30 mL); · HI 38083C-0 EDTA Solution, 3 bottles (3 x 100 mL); · Calmagite Indicator, 1 bottle with dropper (10 mL); · Demineralizer Bottle with filter cap for about 12 liters of deionized water (depending on the hardness level of water to be treated); · 1 2-mm soil sieve; · 1 plastic test tube (14 mL) with screw cap; · 1 plastic test tube (50 mL) with screw cap; · 1 small funnel; · filter paper discs 80 mm (100 pcs); · 1 brush; · 1 calibrated plastic vessel (50 mL); 25 mL SIGNIFICANCE AND USE Alkaline soils are characterized by a low electrical conductivity (EC), high exchangeable sodium percentage (ESP) and presence of carbonate and bicarbonate sodium salts. Hydrolysis of carbonate causes also an increase in pH, such that it is always greater than 8. 5. The "saline-sodic" soil group, which possesses the following peculiarities, also belongs to this alkaline group: EC > 4 mmhos, ESP > 15, pH 8. 5 High alkalinity causes impairment to plant growth since it gives rise to an incomplete solubilization of necessary nutrients such as iron, copper and manganese. Chlorosis, for instance, is a typical disease of leaves due to iron deficiency. It is possible to correct soil alkalinity by adding a proper compound (generally gypsum) that removes sodium and decreases the pH. The exact quantity of gypsum needed for correction can be calculated with the Hanna Gypsum Requirement Test Kit. · Add 1 spoon of HI 38083A-0 Calcium Sulfate (discard the excess soil by using the handle of the other spoon). CHEMICAL REACTION The extraction method is the saturated calcium sulfate method. The Hanna Test Kit determines Gypsum Requirement by · Place the cap on the tube and shake it several times during a 15 minute period. · Place the tube into the large (50 mL) vessel and wait for 30 minutes. The saturated calcium sulfate extractant solution is ready. 02/00 PRINTED IN ITALY · To obtain the soil extract measure in the small (14 mL) test tube 0. 5 mL of the prepared soil and add with the 3 mL pipette the saturated 11 calcium sulfate extractant so0. 5 mL lution up to the 11 mL mark. of soil · Replace the cap and shake vigorously by striking the tube against the palm of your hand, to completely suspend the soil. Shake the tube three times for 1 minute at 10 minute intervals. [. . . ] The extracted sample in the beaker is now ready for analysis. DETERMINATION OF GYPSUM REQUIREMENT · Take the syringe and push the plunger completely down into the syringe. Insert tip into sample and pull the plunger out until the lower edge of the seal is on the 0. 0 mL mark of the syringe. · Continue adding EDTA Solution until the solution in the vessel changes from red-violet to pure blue. [. . . ]