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Ammonia nitrogen online analyzer
Wuxi Dianchuang Technology provides you with prices, models, and user manuals for ammonia nitrogen analyzers. The concentration of NH3-N can be obtain
Product details
1、 Working principle of ammonia nitrogen online analyzer
The colorimetric methods for ammonia nitrogen are generally divided into Nessler's reagent colorimetric method (GB7479-87) and salicylic acid colorimetric method（national standardGB7148-81And internationallyISO7150/1-1948）.Mix the analyzed sample and the expelling agent in a distiller to convert NH4+ions in the sample into ammonia gas (NH3). The ammonia released from the analyzed sample is transferred to the measuring cell and re dissolved in the indicator, which will cause a color change in the indicator. Then, the indicator can be titrated with a titrant to obtain the concentration of NH3-N.
The colorimetric methods for ammonia nitrogen are generally divided into Nessler's reagent colorimetric method (GB7479-87) and salicylic acid colorimetric method（national standardGB7148-81And internationallyISO7150/1-1948）.Mix the analyzed sample and the expelling agent in a distiller to convert NH4+ions in the sample into ammonia gas (NH3). The ammonia released from the analyzed sample is transferred to the measuring cell and re dissolved in the indicator, which will cause a color change in the indicator. Then, the indicator can be titrated with a titrant to obtain the concentration of NH3-N.
The principle of Nessler's reagent colorimetric method:Under alkaline conditions, ionized ammonium in water is converted into free ammonia, and then a certain amount of Nessler's reagent is added. Free ammonia reacts with Nessler's reagent to form a yellow complex. The analytical instrument measures the absorbance A of the reaction solution at a wavelength of 420nm, and the standard working curve is queried based on the A value to calculate the ammonia nitrogen content.
The principle of salicylic acid colorimetric method:In the presence of sodium nitroprusside, free ammonia and ammonium ions in the sample react with salicylate and hypochlorite ions to form a blue compoundMeasure the absorbance A at 670nm, query the standard working curve from A, and calculate the content of ammonia nitrogen. The salicylic acid colorimetric method has advantages such as sensitivity and stability. Adding potassium tartrate masking can remove the interference of cations, especially calcium and magnesium ions.
2、 Characteristics of ammonia nitrogen automatic detector
1. Unique design,Touch screen operation and display, with a graphical user interface and rich teaching programs, easy to operate and learnEnable this product to have a lower failure rate, lower maintenance requirements, and lower reagent consumption compared to similar productsHigher cost-effectiveness.
2. Optical components: Choose domestic online monitoring instrumentsRarely used dual beamDuring testing, it is not affected by various environmental factors. Automatically correct system errors, improve instrument measurement accuracy, stability, and repeatability.
3. Choose valve components: use from the United States, Japan, or Germanyimported with original packagingMainstream fluid components with smaller volume and simpler operation.
4. Measurement component: ThroughVisual Optoelectronic SystemAccurate measurement of reagents has been achieved, overcoming quantitative errors caused by wear of peristaltic pump tubes; At the same time, precise quantification of trace reagents has been achieved, with each dose being only1--5Milliliters greatly reduce the amount of reagents used.
5. Sample injection component:Peristaltic pump negative pressure suctionThere is always an air buffer zone between the reagent and the pump tube to prevent corrosion of the pump tube.
1. Unique design,Touch screen operation and display, with a graphical user interface and rich teaching programs, easy to operate and learnEnable this product to have a lower failure rate, lower maintenance requirements, and lower reagent consumption compared to similar productsHigher cost-effectiveness.
2. Optical components: Choose domestic online monitoring instrumentsRarely used dual beamDuring testing, it is not affected by various environmental factors. Automatically correct system errors, improve instrument measurement accuracy, stability, and repeatability.
3. Choose valve components: use from the United States, Japan, or Germanyimported with original packagingMainstream fluid components with smaller volume and simpler operation.
4. Measurement component: ThroughVisual Optoelectronic SystemAccurate measurement of reagents has been achieved, overcoming quantitative errors caused by wear of peristaltic pump tubes; At the same time, precise quantification of trace reagents has been achieved, with each dose being only1--5Milliliters greatly reduce the amount of reagents used.
5. Sample injection component:Peristaltic pump negative pressure suctionThere is always an air buffer zone between the reagent and the pump tube to prevent corrosion of the pump tube.
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Technical Parameter |
Data indicators |
Parameter Description |
Method basis |
notes |
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measureQuantity range |
0-0.5 mg/L |
Can be expanded according to actual situations |
National standard GB7148-81 International ISO7150/1-1948 |
Abnormal alarms and power outages will not result in data loss，Touch screen display and command input. After abnormal reset and power outage, the instrument will automatically discharge residual reactants and restore working status. |
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Measurement period |
The measurement cycle is 30 minutes |
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refinedAccuracy |
±10% |
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repeatability |
±10% |
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sampling period |
Time interval and hourly measurement mode |
Adjustable from 1 to 9999min |
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calibration cycle |
Adjustable at any interval and time from 1 to 99 days |
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Maintenance Cycle |
Usually once a month, about 60 minutes each time |
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Environmental requirements |
For indoor environments with adjustable temperature, it is recommended to have a temperature range of+5-28 ℃; Humidity ≤ 90% (non condensing) |
No condensation |
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size |
Height 1350 x Width 500 x Depth 400mm |
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power supply |
AC220±10%V，50±10%Hz，5A |
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output |
RS-232, RS485, 4-20mA or 0-5V |
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Amtax CompactThe entire software system framework and external facilities make human-computer interaction more convenient and functional applications more complete;The pollution caused by different water quality on special sites during the instrument measurement process can be set in real-time, greatly reducing the instrument failure rate caused by this problem and making the measurement data more accurate;The instrument has an automatic calibration mode. After automatic calibration, the instrument returns to automatic mode and runs according to the user's set parameters, without the need for staff to monitor the entire process, greatly reducing maintenance time and improving maintenance efficiency;Instrument measurement of water samples is divided into online mode (i.e. automatic mode) and offline mode (i.e. manual mode). In offline mode, calibration tubes are used for measurement, without the need to remove the water sample tube from the sampling port or cup, making maintenance more convenient;The instrument can be stored10000Data can be exported with just one click;The online mode (i.e. automatic mode) and offline mode (i.e. manual mode) of the instrument store data independently, and the offline mode data is not uploaded to the data acquisition instrument, avoiding the impact of instrument maintenance on uploaded data.
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