LaMotte GS-01 User Manual
Greenhouse
Soil Testing
Outfit
Code 5269-02
Model GS-01
L M
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LaMOTTE COM PANY
Helping Peo ple Solve An a lyt i cal Chal lenges
PO Box 329 • Chestertown • Mary land • 21620 • USA
800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax 410-778-6394
Visit us on the web at www.lamotte.com
SM
65269 · 12/02
TI TRA TION B: CAL CIUM
1. Fill test tube (0778) to 5 mL line with diluted soil extract. Dilute to
10 mL line with deionized water.
2. Add 2 drops of *Inhibitor Reagent (9258). Swirl to mix.
3. Add 2 drops of *TEA Reagent (3921). Swirl to mix.
4. Add 8 drops of *Sodium Hydroxide Reagent w/Metal Inhibitors
(4259). Swirl to mix.
5. Add one Calcium Hardness Indicator Tablet (T-5250). Cap and
swirl until tablet disintegrates. Solution will turn red.
6. Fill the Direct Reading Titrator (0384) with Standard EDTA
Reagent (5254). Insert Titrator tip into the center hole of the test
tube cap.
7. While swirling the tube, slowly press the plunger to titrate sample
until color changes from red to blue, and does not revert to red for
at least one minute.
8. Read the result where the plunger tip meets the scale. Multiply by
5.16. Record as Value B.
FI NAL RE SULTS
Calcium:
Titration Value B x 0.4 = ppm Ca
Magnesium:
0.24 (Value A - Value B) = ppm Mg
NOTE: To obtain results in lb/acre, multiply results by 2.
TA BLE OF CON TENTS
Page
Use of the Octet Comparator..................................................................4
Accessories ...............................................................................................4
Sampling Procedure ............................................................................... 5
Preparing the Soil Extract ...................................................................... 6
Test Procedures:
Conductivity.................................................................................... 7
pH ................................................................................................... 8
Nitrate Nitrogen.............................................................................. 9
Phosphorus ................................................................................... 10
Potassium ...................................................................................... 11
Calcium and Magnesium .............................................................. 12
14
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