LaMotte SMART3 Soil Operator's Manual page 83

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AMMONIA NITROGEN
NESSLERIZATION METHOD • CODE 3642-SC
QUANTITY CONTENTS
30 mL Ammonia Nitrogen Reagent #1
2 x 30 mL *Ammonia Nitrogen Reagent #2
1 Pipet, 1 mL, 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).
A fertile soil may be expected to give a low ammonia nitrogen test reading, unless there
has been a recent application of nitrogenous fertilizer in forms other than the nitrate.
The rapid disappearance of ammonia after fertilizer application indicates the desired
transformation of the ammonia to the more available nitrate compounds. In forest soils,
ammonia is the most abundant available form of nitrogen. If there is a satisfactory
rate of nitrogen transformation, the humus layers of a forest soil will produce very high
concentrations of ammonia nitrogen.
RANGE:
METHOD:
INTERFERENCES:
Smart3 Soil Test Procedures 9.18
www.calcert.com
15
10 20
5 25
0 30
0.00-200.00 lb/acre Ammonia Nitrogen
Ammonia forms a colored complex with Nessler's
Reagent in proportion to the amount of ammonia
present in the sample. Rochelle salt is added to prevent
precipitation of calcium or magnesium in undistilled
samples.
Sample turbidity and color may interfere. Turbidity may
be removed by a fi ltration procedure. Color interference
may be eliminated by blanking the instrument with a
sample blank.
CODE
V-4797-G
*V-4798-G
0354
AMMONIA NITROGEN
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