LaMotte LTC3000wi User Manual
LIME RE QUIRE MENT
OF SLUDGE AP PLIED SOILS
MODEL LS · CODE 7491
For determining lime requirements to maintain soil pH at or above
permit levels on sludge applied lands.
QUANTITY CONTENTS CODE
500 mL Woodruff Buffer 5272-L
1 Demineralizer Bottle 1152
1 Soil Measure, 10 g 1164
1 Beaker, plastic, 50 mL 0944
1 Graduated Cylinder, 10 mL, glass 0416
1 Stirring Rod, plastic 0519
To order a complete set of refill reagents, order as R-7491. To order individual
reagents or test kit components, use the specified code number.
DEMINERALIZER BOT TLE
The LaMotte Demineralizer Bottle is a plastic bottle with a pour spout
and a special filter inside the cap. The bottle is partially filled with an
ion exchange resin containing an indicator to show when the exchange
resin has been exhausted. The indicator will change from dark green to
yellow amber, at which point the resin should be replaced. Use Code
R-1152 to order a resin refill package.
INSTRUCTIONS
1. Remove cap and fill bottle with water to be demineralized.
2. Recap, make sure spout is closed, and shake vigorously for 30
seconds.
3. Open spout, invert bottle, and gently squeeze to dispense the
demineralized water.
CARE OF THE DEMINERALIZER BOTTLE
A. Do not heat water over 100oF.
B. Keep the resin covered with water at all times.
C. Leave the bottle fairly full when storing.
PRO CE DURE
NOTE: A suitable digital or analog pH meter with glass electrode is
needed to perform this test (not supplied with reagent tray).
1. Use the 10g plastic soil measure (1164) to add one level measure of
soil to the 50 mL beaker (0944). Fill the graduated cylinder to the
10 mL line with deionized water from the demineralizer bottle
(1152). Pour into the beaker. Stir thoroughly.
2. Let stand for at least 15 minutes.
3. Use the graduated cylinder (0416) to add 20 mL (two full
measures) of Woodruff Buffer (5772). Mix well. Let stand for at
least 20 minutes, stirring two or three times.
4. Determine the pH using a glass electrode pH meter. Stir mixture
while making the reading.
5. Each 0.1 pH unit drop from pH 7.0 indicates a lime requirement
equivalent to 1000 lbs. Calcium Carbonate (CaCO3) per acre.
LaMOTTE COM PANY
Helping People Solve Analytical Challenges
PO Box 329 • Chestertown • Mary land • 21620 • USA
800-344-3100 • 410-778-3100 (Out side USA) • Fax 410-778-6394
Visit us on the web at www.lamotte.com
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