Fundamental
Ammonia reacts with salicylates and hypochlorite ions in the presence of alkaline media and sodium nitrosyl ferricyanide (sodium nitroprusside) to form a water-soluble blue compound that has the largest concentration at 697 nm Absorption, through the photoelectric colorimetric method, according to Lambert – Beer’s law, measured the water sample ammonia nitrogen content. Which adds a specific masking agent to remove the interference of cations (especially calcium, magnesium ions).
Performance parameters
Measurement method: salicylic acid spectrophotometric method
Measuring range: 0 ~ 300.0mg / L (according to customer demand expansion range)
Indication error: ≤ ± 3%
Repeatability: ≤ ± 2%
Zero drift: ≤ ± 0.02mg / L
Range drift: ≤ ± 1%
High and low temperature environmental impact: ≤ ± 5%
Memory effect: ≤ ± 0.2mg / L
Measurement period: minimum measurement period 20min
Measuring method: automatic interval measurement and the whole point of measurement mode
MTBF: ≥1440 hours
Power supply: 220VAC ± 10%; 50Hz ± 5%
Volume: 1600mm × 500mm × 420mm
Interface: RS232 / RS485, 4 ~ 20mA input / output, switch input × 2, switch output × 2
Instrument features
Using the national standard HJ536-2009 “water quality – determination of ammonia – salicylic acid spectrophotometric method”;
Unique three-level precision photoelectric metering device, reagent extraction quickly and accurately, significantly reduce the impact of peristaltic pump tube aging;
Accurate temperature compensation algorithm and environmental light elimination measures, regardless of spring, summer, autumn and winter, the accuracy is always the same;
Type : concentration
Applications : measurement, water, environmental
Interface : RS-485, RS-232
Other characteristics : automatic, online
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