Luheng Bio Portable COD Ammonia Nitrogen Detector LH-C2

Luheng Biotechnology portable enterprise wastewater COD ammonia nitrogen rapid detection instrument LH-C2 testing principle:

This instrument uses rapid digestion spectrophotometry, Nessler's reagent spectrophotometry, and ammonium molybdate spectrophotometry to measure COD concentration and ammonia nitrogen concentration in water samples, respectively.

Luheng Biotechnology Portable Enterprise Wastewater COD and Ammonia Nitrogen Rapid Detection Instrument LH-C2 Technical Parameters:

1. Measurement range: COD: 0-15000mg/L (segmented)

Ammonia nitrogen: 0.00-50.00mg/l (segmented)

2. Light source: light-emitting diode

3. Wavelength: 450nm/520nm/610nm

4. Accuracy: ± 5%

5. Method: Using spectrophotometry

6. Operating environment: Temperature range of 0-50 ℃

Relative humidity 0-80% (no condensation)

7. Battery life: over 30 hours

8. Size: 90mm × 70mm × 125mm

9. Weight: 280g (including battery)

Luheng Biotechnology portable enterprise wastewater COD ammonia nitrogen rapid detection instrument LH-C2 ammonia nitrogen detection instructions:

Pre test instructions:

When holding a test tube, the head should be held, and the surface of the test tube should be wiped clean with a mirror cloth before being placed in the testing chamber.

To determine ammonia nitrogen, the inner sleeve of the instrument needs to be removed.

Measurement steps:

1. Estimate the ammonia nitrogen content in the water sample and select an appropriate range.

2. Press the 'switch' button to turn on the device, and the screen will display 'idLE' in the middle, indicating that the startup is complete. Press the 'switch' button to select the desired testing item.

3. Take 10ml (at the mark) of distilled water and inject it into the colorimetric bottle. Cover it with a lid, wipe off any water stains or fingerprints on the surface of the colorimetric bottle, place it in the testing chamber, and cover it with the lid.

4. Press the 'Zero' button to reset, and when the screen displays' 0.00 ', it indicates that the reset is complete.

5. Select reagents according to the corresponding range and add them to the water sample:

When the ammonia nitrogen content in the water sample is 0-5mg/l (A55):

1) Pour out the distilled water from the colorimetric bottle and take a small amount of the water sample to be tested to rinse the colorimetric bottle. Pour out the rinsing liquid and take 10ml (at the mark) of the water sample to be tested into a colorimetric bottle.

When the ammonia nitrogen content in the water sample is 0-50mg/l (A56):

1) Pour out the distilled water from the colorimetric bottle, shake dry as much as possible, and take 1ml of water sample and 9ml of distilled water into the colorimetric bottle.

6. Add 6 drops of activator A1 to the colorimetric bottle, shake well, and then add 6 drops of activator B2, shake well. Clean the colorimetric bottle and place it in the testing chamber, then cover the chamber lid.

7. Press the "Read" button to read, and the instrument will start a 3-minute countdown. After the countdown ends, the instrument will automatically read. The value displayed in the center of the screen at this time is the measured concentration value (unit: mg/l）。

8. After the test is completed, press the "on/off" button to shut down and clean the colorimetric bottle.

Luheng Biotechnology portable enterprise wastewater COD ammonia nitrogen rapid detection instrument LH-C2 COD detection instructions:

Pre test instructions:

When holding a test tube, the head should be held, and the surface of the test tube should be wiped clean with a mirror cloth before being placed in the testing chamber.

Measurement steps:

1. Estimate the COD value of the water sample and select an appropriate range.

2. Select reagents according to the corresponding range and add them to the water sample:

When the COD value of the water sample is 0-150mg/l (c11):

1) Use a pipette to absorb 2ml of distilled water and add it to an LR reagent tube (for zeroing).

2) Use a pipette to draw 2ml of the water sample to be tested and add it to another LR reagent tube.

When the COD value of the water sample is 100-1500mg/l (c12):

1) Use a pipette to absorb 2ml of distilled water and add it to an HR reagent tube (for zeroing).

2) Use a pipette to draw 2ml of water sample and add it to another HR reagent tube.

When the COD value of the water sample is 1000-15000mg/l (c13):

1) Use a pipette to absorb 2ml of distilled water and add it to an HR reagent tube (for zeroing).

2) First, use a pipette to draw 1.8ml of distilled water and add it to another HR reagent tube, then add 0.2ml of water sample.

Note: c12 and c13 can use one zeroing reagent tube.

(Danger: The reagent tube contains concentrated sulfuric acid. Please wear gloves during operation. If it accidentally comes into contact with the skin, please rinse immediately with plenty of water.)

3) Tighten the lid of the reagent tube, invert it up and down, and shake well. Place the reagent tube into the digestion apparatus and digest at 165 degrees Celsius for 20 minutes

(Warning: When adding water sample, the temperature inside the reagent tube rises sharply. When operating, hold the lid in your hand to avoid burns.)

4) After digestion is complete, take out the reagent and place it on a test tube rack to cool to around 80 degrees Celsius (which can be supported by hands), then shake the liquid in the reagent tube again.

5) Place the reagent tube on the test tube rack and continue to cool to room temperature. Do not shake the reagent tube at this time. If the liquid in the reagent tube is turbid or there are particles suspended, wait until the suspended matter is completely precipitated.

6) Press the 'switch' button to turn on the device, and the screen will display 'idLE' in the middle, indicating that the startup is complete. Press the 'switch' button to select the desired testing item.

7) Open the detection chamber cover, ensure that the surface of the zeroing water sample reagent tube is clean, place it in the detection chamber, cover the chamber cover, press the "zeroing" button, and when the screen displays "0" in the middle, it indicates that the zeroing is complete.

8) Open the compartment cover, take out the zeroing reagent tube, put in the water sample reagent tube to be tested, ensure that the surface of the reagent tube is clean, and cover the compartment cover.

9) Press the 'Read' button, and the number displayed in the middle of the screen represents the detection value of the water sample. (Unit: mg/l）

10) After the test is completed, press the "switch" button briefly to turn off the instrument.

Warning: 1. The activator has a certain degree of irritation. Please wear gloves when using it. If it accidentally comes into contact with the skin, rinse with plenty of water.

2 COD、 Ammonia nitrogen and total phosphorus cannot be detected simultaneously.