LaMotte NITROGEN DIOXIDE IN AIR User Manual
NI TRATE/NI TRITE TEST KIT
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MODEL NCR-2 • CODE 3519
QUANTITY CONTENTS CODE
2 x 120 mL *Mixed Acid Reagent *V-6278-J
5 g *Nitrate Reducing Reagent *V-6279-C
5 g *Color Developing Reagent *V-6281-C
2 Spoons, 0.1g, plastic 0699
4 Test Tubes, 2.5 & 5.0 mL, glass 0820
1 Water Sample Bottle 0688
1 Dispenser Cap 0692
1 Nitrate-N Comparator, 0.25-10.0 ppm 3109
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
To order a complete set of refill reagents or test kit components, use the specified code
number.
NOTE: Place Dispenser Cap (0692) on *Mixed Acid Reagent (V-6278).
Save this cap for refill reagents.
Nitrites can cause serious interference in the Nitrate test. To obtain the actual
nitrate-nitrogen concentration, follow Procedures A & B. Subtract the nitrite
reading obtained in Procedure B (as ppm nitrate-nitrogen) from the nitrate
reading obtained in Procedure A (as nitrate-nitrogen).
The best results are obtained when the sample and reagents are at 23 ±2°C.
PRO CE DURE A - NI TRATE TEST
1. Fill sample bottle (0688) with sample water.
2. Fill test tube (0820) to bottom line (2.5 mL) with water from the
sample bottle.
3. Dilute to second (5.0 mL) line with *Mixed Acid Reagent (V-6278).
Cap and mix. Wait two minutes.
4. Use the 0.1 g spoon (0699) to add one level measure (avoid any
excess) of *Nitrate Reducing Reagent (V-6279). Cap and invert the
tube 50-60 times in one minute. Wait 10 minutes.
5. Mix before inserting the tube into the Nitrate-N Comparator (3109).
Match sample color to a color standard. Record as ppm
Nitrate-Nitrogen.
6. To convert to ppm Nitrate (NO3), multiply the test result by 4.4.
Record as ppm Nitrate.
NOTE: To obtain the actual nitrate concentration, follow with
Procedure B and subtract the nitrite reading from the reading
obtained in the nitrate test.
PRO CE DURE B - NI TRITE TEST
1. Fill the sample bottle (0688) with sample water.
2. Fill test tube (0820) to bottom line (2.5 mL) with water from the
sample bottle.
3. Dilute to top (5.0 mL) line with *Mixed Acid Reagent (V-6278).
Cap and mix.
4. Use the 0.1 g spoon (0699)to add one level measure (avoid any
excess) of *Color Developing Reagent (V-6281). Cap and invert the
tube 50-60 times in one minute. Wait 10 minutes.
5. Mix before inserting the tube into the Nitrate-N Comparator (3109).
Match sample color to a color standard. Record as ppm Nitrite as
Nitrate-Nitrogen.
6. Use the following table to convert reading to Nitrite-Nitrogen.
Record as ppm Nitrite-Nitrogen.
Comparator Reading Divide By
0.5 or less
0.5-1.5
over 2.0
3.5
4.6
5.8
NOTE: If the nitrate-nitrogen reading is higher than 10.0 the sample
can be diluted 1:1 with nitrate and nitrite free water, the test run and
the resultant value obtained multiplied by 2.
LaMOTTE COM PANY
Helping Peo ple Solve An a lyt i cal Chal lenges
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
SM
09/11
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