LaMotte pH MODULE AM-31 - Manual (Page 2)

USE OF THE OC TET COM PARA TOR
The Octet Comparator contains eight permanent
color standards. A test sample is inserted into the
openings in the top of the comparator. The sample
can then be compared to four color standards at
once, and the value read off the comparator. For
optimum color comparison, the comparator should
be positioned between the operator and a light
source, so that the light enters through the special
light-diffusing screen in the back of the comparator.
Avoid viewing the comparator against direct
sunlight or an irregularly lighted background.
PRO CE DURE
1.
Fill test tube (0845) to line with Tricon Flocculating Reagent (5941).
2. Use 0.5g spoon (0698) to add three level measures of soil. Cap and
gently mix by inverting the tube back and forth slowly for one
minute. Allow soil particles to settle.
NOTE:
The amount of time required for a soil to settle varies with
texture; clay soils may require additional time, but in most instances
the solution will be clear in several minutes.
3. Add 9 drops of *Tricon Soil pH Indicator (5937). Cap and invert the
test tube gently one time to mix the contents. Allow soil to settle.
4. Place test tube in the Tricon pH Comparator (5936). Match sample
color to a color standard. Record as soil pH.
LaMOTTE COM PANY
Helping Peo ple Solve An a lyt i cal Chal lenges SM
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
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