LaMotte SMART3 Soil Operator's Manual page 85

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CALCIUM & MAGNESIUM
SCHWARZENBACH EDTA METHOD • CODE M-CAL-MAG
QUANTITY CONTENTS
30 mL *Calcium & Magnesium Buff er
60 mL Standard EDTA Reagent
50 Calcium Hardness Indicator Tablets
30 mL Calcium Magnesium Inhibitor Reagent
30 mL *CM Indicator Reagent
30 mL *Sodium Hydroxide w/Metal Inhibitors
15 mL *Inhibitor Solution
15 mL *Triethanolamine Reagent
2 Direct Reading Titrators, 0-1000 Range
1 Pipet, transfer, plastic
1 Test tube, 5-10-15 mL, glass, w/cap
*WARNING: Reagents marked with an * are considered to be potential health hazards.
To view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com.
Search for the four digit reagent code number listed on the reagent label, in the
contents list or in the test procedures. Omit any letter that follows or precedes the four
digit code number. For example, if the code is 4450WT-H, search 4450. To obtain a
printed copy, contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585).
The amount of total calcium in soils may range from as little as 0.1% to as much 25%.
A calcium defi ciency is rarely a problem due to widely accepted practice of applying
lime to soil to raise the pH to the proper range for optimum plant growth. As an
important mineral nutrient, calcium is a component of cell walls in plants and is known
to stimulate root and leaf development as well as activate several enzyme reactions
involved in plant metabolism. Indirectly, calcium infl uences crop yields by reducing soils
acidity and by reducing the toxicity of several other soil minerals such as manganese,
zinc, and aluminum.
The Schwarzenbach EDTA titration method, used to determine calcium and magnesium,
involves two titrations. The fi rst titration gives the calcium and magnesium content, the
second only calcium. Magnesium is calculated from the diff erence between the titration
values.
Smart3 Soil Test Procedures 09.18
www.calcert.com
15
10 20
5 25
0 30
CODE
*5126-G
5254-H
5250A-H
3922-G
*6522WT-G
*4259-G
*9258-E
*3921-E
0384
0364
0778
CALCIUM & MAGNESIUM
sales@calcert.com