Hanna Instruments HI 38084 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 chemical test kit from the packing material andexamine it carefully to make sure that no damage hasoccurred during shipping. If there is any noticeable dam-age, notify your Dealer or the nearest Hanna officeimmediately.Each kit is supplied with:• Potassium Chloride, 1 box (380 g);• Phenolphthalein Indicator, 1 bottle with dropper (20 mL);• HI 38084C-0 Titration Solution, 1 bottle (120 mL);• Demineralizer Bottle with filter cap for about 12 litersof deionized water (depending on the hardness levelof water to be treated);• 1 2-mm soil sieve;• 1 large funnel;• filter paper discs ∅ 120 mm (100 pcs);• 1 plastic test tube (50 mL) with screw cap;• 1 calibrated plastic vessel (50 mL);• 2 sample cups (2 g);• 1 sample cup (1 g);ISTR38084 02/00 PRINTED IN ITALYINSTRUCTIONSSAMPLING PROCEDURESIGNIFICANCE AND USEThe total exchangeable acidity (TEA) is a measure of theamount of acidic cations (hydrogen, aluminum, iron andmanganese) present in soil. It is expressed in milliequivalentper 100 grams (meq/100 g) of soil. The more acidic it is asoil, the lower the soil pH value will be. Soils in humidregions normally accumulate increasing amounts of ex-changeable acidity as they get older. Soil acidity maydevelop toxicity that can damage or kill plants.READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT• Remove the capand fill the Dem-ineralizer Bottlewith tap water.• Replace the capand shake gen-tly for at least2 minutes. Thedemineralizedwater is nowready.• Flip open the top of the Deminer-alizer Bottle cap. By gentlysqueezing the bottle, add dem-ineralized water to the large (50mL) test tube up to the 50 mLmark.• Add 2 measures of the large (2 g) sample cup ofPotassium Chloride (add full cups and discard the excesssoil by using the spoon handle).• Place the cap on thetube and shake it sev-eral times until thereagent has completelydissolved. The potassiumchloride extractant so-lution is now ready.• Place the funnel on the top ofthe beaker.• 1 plastic pipette (1 mL);• 1 brush;• 1 spoon.Note: Any damaged or defective item must be returned inits original packing materials.WHEN TO TEST YOUR SOILSoil should be tested not only when the plant appears tobe unhealthy (yellow leaves or stunted growth), but prior toseeding, planting and fertilizing as well as when othermaterial such as manure or compost has been added.SAMPLING1) Soil Sample Extraction– Within a large homogeneous area, take 1 or 2 samplesper 1000 m2 (0.25 acre).– Even for smaller areas, 2 samples are recommended(the more samples, the better the end-results, be-cause the end sample is more representative).– For a small garden or plot, 1 sample is sufficient.2) Avoid extracting samples from soil presenting obviousanomalies and from border areas (near ditches and roads).3) Sample quantity:Take the same quantity of soil for each sample. For ex-ample, use bags with similar dimensions (1 bag persample).4) Depth of extraction:General: dig and discard 5 cm (2") of topsoilFor lawns: take the sample at a depth of 5 to 15 cm (from2" to 6").For other plants (flowers, vegetables, shrubs): from 20 to40 cm of depth (8" to 16").For trees: Samples from 20 to 60 cm of depth (8" to 24'’).5) Mix all the samples together to obtain a homogeneousmixture of soil, discarding stones and vegetable residues.6) From this mixture, take the quantity of soil that youneed for the analysis.7) Crumble the large chunks and distribute the soil sampleon paper or plastic to air dry it.8) Use a small bar to crush the air dried sample and pass itthrough the 2-mm soil sieve.CHEMICAL REACTIONThe extraction method is the potassium chloride method.The acidic cations are firstly leached from the soil and thentitrated with a standard alkali. The reaction endpoint isvisually indicated by a color change (from colorless to pink)of the indicator reagent.x 2Range 0 to 2.5 meq/100 gSmallest Increment 0.1 meq/100 gAnalysis Method TitrationSample Size 5 g of soilNumber of Tests 100Case Dimensions 235x175x115 mm (9.2x6.9x4.5")Shipping Weight 1027 g (36.2 oz.)Note: TEA is Total Exchangeable Acidity; meq/100 g ismilliequivalent per 100 grams.SPECIFICATIONS50 mLHI 38084Total ExchangeableAcidity Test Kit

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