LaMotte AM-21 Water Pollution Detection Outfit - Manual (Page 10)

Ammonia Nitrogen Test
Ammonia nitrogen is present in variable concentrations in many surface and
ground waters, however, any sudden change in the analysis of a supply which
has been rather constant composition is cause for suspicion. A product of
microbiological activity, ammonia nitrogen is sometimes accepted as
chemical evidence of sanitary pollution when encountered in raw surface
waters.
Ammonia in water is detected by means of *Nessler’s Reagent (4798) which
reacts with ammonia to form a yellow color. The amount of color developed
is directly proportional to the amount of ammonia present.
Field Test Method
Quantity Contents Code
30 mL Ammonia Nitrogen Reagent #1 4797WT-G
30 mL *Ammonia Nitrogen Reagent #2 *4798WT-G
1 Test Tube, 5.0 mL, w/cap 0230
1 Ammonia Nitrogen Comparator,
1.0 and 5.0 ppm 7471
WARNING: Reagents marked with a * are considered to be potential health hazards.
To view or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD
or www.lamotte.com. To obtain a printed copy, contact LaMotte by email, phone or fax.
Procedure
1. Fill the test tube (0230) to the 5.0 mL line with sample water.
2. Add 4 drops of Ammonia Nitrogen Reagent #1 (4797). Cap and mix.
3. Add 8 drops of *Ammonia Nitrogen Reagent #2 (4798). Cap and mix.
4. Insert test tube into the Ammonia Nitrogen Comparator (7471). Match
sample color to a color standard. Record as ppm Ammonia Nitrogen.
10