|Range||MDL||Method||Kit Catalog No.||Refill Catalog No.|
|0-4 & 0-80 ppm||0.125 ppm||Hydroxybenzyl Alcohol (HBA)||K-1420||R-1402|
|0-125 & 0-2500 ppm||8 ppm||Hydroxybenzyl Alcohol (HBA)||K-1420D||R-1402D|
|0-500 & 0-10,000 ppm||30 ppm||Hydroxybenzyl Alcohol (HBA)||K-1420B||R-1402B|
|0-1 & 1-10 ppm||0.05 ppm||Direct Nesslerization||K-1510*||R-1501*|
|0-30 & 30-300 ppm||5 ppm||Direct Nesslerization||K-1510D*||R-1501D*|
|0-60 & 60-600 ppm||10 ppm||Direct Nesslerization||K-1510A*||R-1501A*|
|0-120 & 120-1200 ppm||20 ppm||Direct Nesslerization||K-1510B*||R-1501B*|
|0-1000 & 1000-10,000 ppm||100 ppm||Direct Nesslerization||K-1510C*||R-1501C*|
|Range||Method||Kit Catalog No.|
|0-3.00 & 0-60.0 ppm||Hydroxybenzyl Alcohol (HBA)||K-1413|
|0-7.00 ppm||Direct Nesslerization||K-1503*|
|0-14.0 ppm||Direct Nesslerization||K-1523*|
Low-level ammonia nitrogen may be naturally present in water as a result of the biological decay of plant and animal matter. Higher concentrations in surface waters can indicate contamination from waste treatment facilities, raw sewage, industrial effluents (particularly from petroleum refineries), or fertilizer runoff. Excessive ammonia concentrations are toxic to aquatic life.
In the ammonia test method that employs the Hydroxybenzyl Alcohol chemistry, free ammonia reacts with hypochlorite to form monochloramine. Monochloramine reacts with HBA, in the presence of sodium nitroferricyanide, to form a green colored complex. This test method measures the sum of free ammonia and monochloramine. Results are expressed in ppm (mg/L) ammonia-nitrogen, NH3-N.The Hydroxybenzyl Alcohol Method offers sensitivity similar to the Nesslerization Method and there is no generation of mercury-containing waste.