LaMotte SMART3 Soil Operator's Manual page 94

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MANGANESE
PERIODATE METHOD • CODE 3669-SC
QUANTITY CONTENTS
10 g Manganese Buff er Reagent
15 g *Manganese Periodate Reagent
1 Spoon, 0.1 g, plastic
1 Spoon, 0.15 g, plastic
*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 manganese available to the plant is dependant upon the soil pH, the
quantity of organic matter present, and the degree of aeration. Manganese defi ciency
is most likely to occur in neutral or alkaline soils because it is less soluble at elevated
pH levels. In extremely acid soils, where manganese is more soluble, toxic levels may
exist which may reduce crop yields. In slightly acid sandy soils, manganese may leach
past the root zone and not be able for utilization by the plant. Also, it is believed that
manganese may form insoluble organic complexes in some soils that have high humus
content. All of the factors contribute to the availability of this essential element. Only
soil or tissue tests can determine whether defi cient or toxic levels of manganese exist.
Although manganese is known to play an important role in many of the metabolic
processes in the plant, little is known about its function other than it is required in some
enzyme reactions and is required for the formation of chlorophyll in the plant.
RANGE: 0.00–75.00 ppm Manganese
METHOD: Periodate oxidizes soluble manganous compounds into
permanganate.
INTERFERENCES: Reducing substances capable of reacting with periodate or
permanganate must be removed or destroyed before the
periodate oxidation is attempted.
Smart3 Soil Test Procedures 9.18
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15
10 20
5 25
0 30
CODE
6310-D
*6311-E
0699
0727
MANGANESE
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