The LH-C3 portable COD ammonia nitrogen total phosphorus rapid detection instrument from Luheng Biology is widely used for rapid detection of COD ammonia nitrogen total phosphorus in surface water, groundwater, industrial sewage, and wastewater.

Pre test instructions:

● Hand heldtest tubeWhen neededhead，Put the test tube into the testing chamberBefore use, wipe the mirrorclothWipe cleantest tubesurface.

Measurement steps:

1.take2mlPure water and2mlTest solutionAdd different ones separatelyIn the COD reagent tube, tighten the lid, slowly shake the solution in the tube, place the tube into the digestion apparatus, and digest at 165 ℃ for 20 minutes. （dangerThe 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

After digestion is complete, remove the reagent tube and place it on a test tube rack to cool to below 80 ℃. （warningThe temperature of the digestion instrument and reagent tube is high, so be careful not to burn them during operation

3. Shake the liquid in the reagent tube again.

4. 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.

5.Press“switch”keyPower on, ScreenMiddle display“idLE”expressPower on completed, InstrumentIn standby mode.

6.hitOpen the inspection compartment coverEnsure adjustmentZero water sampletryPipesurfaceClean faceTake itIts releaseenterTo the testing warehouse, CoverCover the upper compartment, press“Zero adjustment”Key, screenMiddle display“0”WhenIndicates completion of zero adjustment.

7.hitOpen warehouse lid，takeZero water adjustmentSample, put it inenterstaymeasurewater sample, CoverCover the upper compartment.8.Press“readnumber”key, ScreenThe number displayed in the middle represents the detection value of the water sample. (Unit:)mg/L）

9.After the test is completed, press briefly“switch”Press the key to turn off the instrument.

matters needing attention

1Any liquidorforeign bodyEnter the testing warehouseInternally, it is possible to damage the instrument.

2.ifThe concentration of the water sample exceedsinstrumentRange, please dilute the water sample and retest，The measured value multiplied by the dilution factor is the concentration value of the water sample.

3. The surface of the test tube should not have water stains, scratches, dust, or fingerprints.

Battery requirements: Please use1.5V 5numberAlkaline batteries.

Interference factors:

1、The chloride ion content is higher than1000mg/LThe sample may cause the measurement results to be biased, and quantitative dilution should be performed first to reduce the chloride ion content to1000mg/LBelow, measure again.

2、Containing aromatic organic compounds, pyridine, volatile linear aliphatic compounds, benzene and other organic compounds, they may not be completely oxidized, resulting in low measurement results.

3、Mn(Ⅲ)、Mn(Ⅵ)、Mn(Ⅶ)Forming a red substance, causing the measurement results to be biased.

Standard solution configuration:referenceHJ/T 399-2007National environmental protection standards.

《Water QualityDetermination of Chemical Oxygen DemandRapid digestion spectrophotometry》

technologyparameter

determinationRange： COD：0~15000Mg/L (segmented)

Ammonia nitrogen: 0-50mg/L (segmented)

Total phosphorus: 0-20mg/L (segmented)

Light source: RadiantPhotodiode

wavelong：420~630nm

Accuracy:±5%

Method: Rapid digestion spectrophotometry was used

useenvironment: Temperature0~50℃

relativehumidity0-80%(nothingcondensation)

Batterylife：30SmallWhenwithupper

Size:90mm×70mm×125mm

Weight:280g（containelectricpool）

After sales: The instrument comes with a one-year warranty and lifetime maintenance.