7
FIELD TEST PROCEDURES
AMMONIA NITROGEN - HIGH RANGE • SMART3 COLORIMETER
Nesslerization Method • Code 3642-SC
QUANTITY
CONTENTS
CODE
30 mL
Ammonia Nitrogen Reagent #1
V-4797-G
2 x 30 mL
*Ammonia Nitrogen Reagent #2
*V-4798-G
1
Pipet, 1 mL, plastic
0354
*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 e-mail, 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).
RANGE:
0.00–4.00 ppm Ammonia Nitrogen
MDL:
0.05 ppm
METHOD:
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 HANDLING &
PRESERVATION:
Ammonia solutions tend to be unstable and should be
analyzed immediately. Sample may be stored for 24
hours at 4°C or 28 days at –20°C.
INTERFERENCES:
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.
PROCEDURE
1. Press and hold
until colorimeter turns on.
2. Press
ENTER
to select
TESTING MENU
.
3. Scroll to and select
ALL TESTS
(or another sequence containing
008
Ammonia-N HR
) from
TESTING MENU
.
4. Scroll to and select
008 Ammonia-N HR
from menu.
5. Rinse a clean tube (0290) with sample water. Fill to the 10 mL line with
sample.
6. Insert tube into chamber, close lid and select
SCAN BLANK
. (See Note)
