Ammonia

SPECIFICATIONS

Method           : Spectrophotometric (DR 2800)

Range              : 0.04 to 0.60 mg/L as NH₃

Testing time    : 30 Minutes

DESCRIPTION

Ammonia reacts with chlorine to form monochloramine. The resulting monochloramine reacts with salicylate to form 5-aminosalicylate. This complex is then oxidized in the presence of sodium nitroprusside catalyst to form a blue-colored compound. The blue color is masked by the yellow color of the excess reagent present, giving a green-colored solution that is directly proportional to ammonia concentration.

ORDERING INFORMATION

Order all replacement parts and reagents by their part numbers. To be sure this product is compatible with your treatment program.

INTERFERENCES

The following ions may interfere when present in concentrations exceeding those listed below : Species            mg/L

Calcium                       1000 mg/L (as CaCO₃)

Magnesium                 6000 mg/L (as CaCO₃)

Nitrite                          100   mg/L NO₂⁻

Nitrate                         100   mg/L NO₃⁻

Orthophosphate          100   mg/L as PO₄³⁻

Sulfate                         300   mg/L SO₄²⁻

Sulfide will intensity the color, and iron interferes with the test.

SAFETY PRECAUTIONS                   

This reagent  contains cyanide and is very poisonous it taken internally or if the fumes are inhaled. Do not add to an acidic sample. Store away from water and acids.

1.      Touch:

Stored Programs

Select stored programs

385 N, Ammonia, Salic

Touch:

 Start

2.      Fill a sample cell to the 10 mL mark with sample.

3.      Fill another sample cell to the 10 mL mark with deionized water (the blank.)

4.      Add the contents of one AM-1 Reagent Powder Pillow to each cell. Stopper and shake to dissolve. 

Caution: This reagent containes cyanide and is very poisonous if taken internally or if the fumes are inhaled. Do not add to an acidic sample. Store away from water and acids.

5.      Touch the TIMER icon.

A three-minute reaction period will begin.

6.      When the timer beeps after three-minute , add the contents of one AM-2 Reagent Powder Pillow to each cell. Stopper and shake to dissolve.

Note: A green color will develop if ammonia is present

7.      Touch the TIMER icon.

A 15-minute reaction period will begin.

8.      Place the sample cell containing the blank into the cell holder and close the cover.

9.      Touch ZERO.

The display will show:

0.00 mg/L NH₃

10.  Place the second 10-mL sample cell with the prepared sample into the cell holder and close the cover

11.  Touch READ

The results in mg/L ammonia as NH₃ will be displayed.