How to use the COD speed tester, I just bought one, I watched it for a long time and a half, I don t

COD Rapid TesterThe main steps are as follows:

water sampling; Add MDS11 reagent and shake well;

Add MDS12 reagent and shake well;

165 Digestion for 10 minutes;

Air cooling for 2 min;

Add distilled water;

Water cool for 2 min;

Colorimetric values record data.

COD rapid tester, digestion instrument.

COD rapid tester steps.

The steps of the COD rapid tester are as follows:

1. Turn on the power of the host of the COD tester and preheat it for 2 minutes; Power on the digester and select the COD digestion mode. (165, 20 minutes).

2. Blank A: Draw 2ml of distilled water into a low-range precast reagent colorimetric tube. (Reagents and digestion are also required), when the COD value of the sample is 0-150 mg L (CODL pre), pipette 2 ml of the sample into another low-range pre-made reagent cuvette, cover and shake well.

The test tube is hot, be careful of burning).

3. Blank B: Absorb 2ml of distilled water in a high-range, pre-made reagent cuvette. (Reagents and digestion are also required).

When the COD value of the sample is 150-1500 mg L (CODM pre), aspirate 2 ml of the sample into another high-range precast reagent cuvette, cap and shake well. The test tube is hot, be careful of burning).

When the COD value of the sample is 1500-15000 mg L (CODH pre), the sample is aspirated into another high-range precast reagent colorimetric tube, distilled water is added, and the lid is shaken. The test tube is hot, be careful of burning).

4. Put it in a heated digester for digestion, and after the digestion is completed, take it out for cooling.

5. After the colorimetric tube is cooled to room temperature, wipe it clean, and calibrate the zero point under the corresponding project, and then measure the sample, and the indicated value is the concentration value.

6. After the measurement is completed, clean the colorimetric tube and dry it.

COD measures chemical oxygen demand (COD) and permanganate index (oxygen consumption), which are important factors in evaluating water quality.

To put it simply, it is the content of organic matter in the water, after all, this is one of the important comprehensive indicators to assess the degree of water pollution, the larger the value of COD, the more serious the water pollution, the COD value of general clean drinking water is 0-20mg L.

In terms of choosing this piece, you can take a look at the products of Changhong Technology, after all, its measurement is accurate, fast and low-cost.

The detector can measure chemical oxygen demand, and there are some indicators, depending on whether you buy multi-functional?

A COD tester is a chemical instrument used to detect COD chemicals.

COD is the abbreviation of chemical oxygen demand, which uses chemical oxidants (such as potassium permanganate) to oxidize and decompose oxidizable substances in water (such as organic matter, nitrite, ferrous salts, sulfides, etc.), and then calculates the oxygen consumption according to the amount of residual oxidant. Like biochemical oxygen demand (BOD), it is an important indicator of water pollution. COD is measured in ppm or milligram liters, and the lower its value, the less polluted the water is.

COD tester.

01) Rapid and accurate determination of chemical oxygen demand in surface water, reclaimed water, municipal sewage and industrial wastewater, and the concentration is directly read;

02) Cold light source, narrowband interference, light source life of 100,000 hours;

03) Support both cuvette colorimetric and cuvette colorimetric methods;

04) Support historical data storage, can store 4000 data (date, time, parameters, measurement results);

05) 5 standard curves in memory7, no need to adjust, can be used directly, 94 extended curves can be freely applied under different personnel, different environments, different wastewater and other conditions;

06) Support curve auto-correction and auto-save.

COD refers to chemical oxygen demand, which is an important indicator to determine the degree of water pollution, and COD detector is an instrument that uses spectrophotometry to determine the value of COD in water.

I know a little bit, I'll tell you!! The uses and 10 characteristics of COD tachymeter are as follows: COD tachymeter can accurately measure surface water, reclaimed water, urban sewage and industrial wastewater at high levels.

The general COD tachometer has the following 10 characteristics: 1. The COD tachymeter adopts a Chinese operation interface, and the large screen guidance menu LCD displays the artificial wavelength continuously optional, which is the first choice for universal three-parameter determination and can directly determine COD, ammonia nitrogen, total phosphorus, and other indicators 2. COD tachymeter uses automatic control of digestion temperature 3. The use of monochromatic light source avoids wavelength adjustment error; The use of cold light source and narrow-band interferometric optical system enhances optical stability 4. The separation of high-temperature digestion and colorimetric parts avoids the influence of high-temperature parts on the optical system. 5. Using VF conversion, software redundancy, software trap and other technologies, strong anti-interference 6. Historical records and curves can be permanently saved in the machine, and will not be lost when power is off. 7. The measurement speed is fast, the cycle is short, the efficiency is high, and the measurement time of each batch of water samples is only about 20 minutes. 8. The COD tachometer can be used as a separate digester to achieve COD. Digestion function of various chemical reactions such as total phosphorus and total nitrogen. The tachymeter continues to innovate and combines the advantages of similar products in the world to become a leader and innovator in the field of domestic COD rapid tester The tachymeter uses aluminum alloy material with excellent thermal conductivity to make the heating body, which has the advantages of fast heating speed, constant and uniform temperature, simple operation, stability and reliability compared with other similar products.

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COD (chemical oxygen demand) is the amount of oxygen consumed by the oxidation of reducing pollutants in the water body by strong oxidants, and is an important comprehensive index to evaluate the degree of water pollution. YC2100 portable COD tachymeter adopts potassium dichromate method, the instrument uses composite reagents, water samples and reagents to mix in 165 constant temperature digester for rapid redox reaction, and then by spectrophotometry to determine the concentration of trivalent chromium ions produced after the reaction, and obtain the corresponding COD value. It has the characteristics of fast, accurate, low test cost, low energy consumption and simple operation, and is widely used in the determination of various sewage and surface water in environmental protection.

1. In order to improve the accuracy of the test, the mutual influence of the samples during the test should be minimized

The cells are sequentially cleaned for the samples to be tested to reduce errors caused by the operation.

2. Blank, standard and water samples must use the same batch of oxidant and catalyst.

3. The reagent used in the experiment is a strong acid, and should not be in direct contact to prevent accidental burns. When operating, strictly prevent the reagent from spilling out, causing pairs.

Injury to the instrument and the operator.

4. The blank test must use the same batch of oxidant and catalyst as the water sample.

Be sure to read the instructions in their entirety before unpacking, installing, or using this instrument.

1. It is strictly forbidden to splash the liquid on the instrument.

2. When the digestion module is still at high temperature, it is strictly forbidden to contact the digestion module.

3. If the instrument is used to digest volatile liquids in a poorly ventilated place, it may lead to the shortening of the life of the instrument circuit part.

4. Avoid placing all kinds of flammable liquids near the instrument being used.

5. Do not let the power cord pass under the instrument.

6. When the instrument is working, it should avoid shock and vibration, and avoid the interference of strong external magnetic fields.

Standard configuration: reactor (12-hole digester), cooling tank rack, special solid reagent,Semi-automatic doser, several special reaction tubes,Cuvette holders, printer paper.

Features:1It can accurately measure surface water, reclaimed water, municipal sewage and industrial wastewater.

2.There are 99 standard curves in memory, which can be modified and saved by yourself.

3.With 3 sets of independent design systems, it can be used by 3 people at the same time to use the same instrument for water sample digestion (optional).

4.It has a data storage function, which can store 4000 pieces of data (accurate storage of measurement indicators, time, data).

5.Prints the current data and all historical data.

6.Transfers current data and all historical data to the computer.

7.Cold light source, narrow-band interference, light source life of 100,000 hours.

8.Auto-correction function.

9.Large screen LCD display, Chinese interface, Chinese button operation.

Technical indicators: digestion temperature: 165

Assay range: 5 5000 mg l

Anti-chlorine interference: [Cl-]<1000 mg L [Cl-]< 4000 mg L

Precision: COD=20mg L V<10% COD=300mg L V<

Display: LCD

Instrument model: YC2100

COD measurement range: 30 1000 mg L, exceeding dilutable determination COD measurement accuracy: COD = 500 mg L Relative standard deviation "Anti-chlorine interference:

Less than 1000 mg l. More than 1000 mg l dilutable assay.

Digestion Temperature Accuracy: 1

Digestion Temperature Stability: 1

Programmable digestion temperature range: 50 200 1

Programmable timer: 0 40 minutes with alarm sound.

Batch volume: 10 times.

Power requirements: 220v 10% 50 1hz

Heating rate: 165 minutes at room temperature.

Temperature Calibration: Built-in.

Ambient temperature: 5-40

Ambient relative humidity: 85%.

Dimensions: 470x300x210