Development background of Guanao portable multi parameter water quality detector:

With the rapid development of China's social economy and the acceleration of urbanization and industrialization, the problem of water pollution has become increasingly prominent, and water quality monitoring has become increasingly important. Portable water quality detectors are small in size, light in weight, and easy to carry. Multi parameter water quality detection is an important development direction30Parameter water quality detectors have emerged.

What is a portable multi parameter water quality detector:

The portable multi parameter water quality analyzer is a new type of instrument that can simultaneously and quickly detect water quality, with easy operation and accurate results. It can be used together with supporting reagents, without the need to prepare standard solutions or draw standard curves to quickly obtain results, making it convenient for field sampling and on-site testing.

portable30Location (purpose) of using the parameter water quality detector:

Guan Aoportable30The parameter water quality detector is widely used in the following applications:location：Household use, water treatment plants, drinking water, laboratories, groundwater, rural water quality, fish tanks, sewage, aquaculture, fish ponds, boilers, etc.

Guanao Portable30Technical parameter indicators of parameter water quality detector:

  1Light source lifespan:≥100000h

  2Detection system: multi-channel independent detection system

  3Detection circuit: high-precision constant testing circuit,Scattered dual path compensation circuit

  4Display mode: Large screen Chinese menu displays concentration values（C）

  5Measurement error:≤±5%F.S

  6Repetitive error:≤±2%

  7Resolution:0.01

  8Storage space: Detection data999group

  9Printing method: Thermal line printing

  10Power supply mode:220V，50HZ

  11Size（mm）：475x335x175

  The working principle of Guanao portable 30 parameter water quality detector:

1. Turbidity detection methods in water: Turbidity testing is divided into two methods: scattering turbidity measurement and transmission turbidity measurement. 1、 The turbidity meter emits light that passes through a section of the sample and detects how much light is scattered by particles in the water from a direction at a 90 ° angle to the incident light. This method of measuring scattered light is called scattering method. 2、 The principle of transmission turbidity measurement: The instrument emits monochromatic light, and the light beam passes through the water sample and encounters small particles in the water, causing scattered light and attenuation. The transmitted light intensity and light intensity attenuation rate are calculated to measure the turbidity of the water sample (high turbidity). Guanao turbidity detection adopts two methods simultaneously for more accurate results.

2. Color detection method in water: Platinum cobalt standard colorimetric method.

3. Methods for detecting ammonia nitrogen in water include Nessler's colorimetric method, phenol hypochlorite (or salicylic acid hypochlorite) colorimetric method, and electrode method. The Nessler's reagent colorimetric method has the characteristics of easy operation and sensitivity. The interference of metal ions such as calcium, magnesium, and iron, sulfides, aldehydes and ketones, color, and turbidity in water requires corresponding pretreatment. The phenol hypochlorite colorimetric method has the advantages of sensitivity and stability, and the interference situation and elimination method are the same as those of the Nessler's reagent colorimetric method. The electrode method usually does not require pre-treatment of the water sample and has the advantages of a wide measurement range. When the ammonia nitrogen content is high, distillation acid titration method can still be used. The turbidity detection is carried out simultaneously using two methods, resulting in more accurate results.

4. Method for detecting suspended solids in water: Transmission turbidity measurement, a multi parameter water quality detection instrument uses emitted monochromatic light to attenuate scattered light when the light beam passes through the water sample and encounters small particles in the water. The transmitted light intensity and light intensity attenuation rate are calculated to measure the turbidity of the water sample (high turbidity). Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

5. Method for detecting DPD residual chlorine in water: DPD (N, N-diethyl-phenylenediamine) reagent reacts with residual chlorine (free residual chlorine) in water to form a red solution. After reacting with a specialized DPD residual chlorine reagent, the remaining chlorine value of the water sample is calculated by spectrophotometry. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

6. Method for detecting total chlorine in water DPD: DPD (N, N-diethyl-phenylenediamine) reagent reacts with residual chlorine in water to form a red solution. After reacting with a specialized DPD residual chlorine reagent, the total chlorine value of the water sample is calculated by spectrophotometry. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

7. DPD compound residual chlorine method in water: The total chlorine content in water minus the residual chlorine content is the compound residual chlorine. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

8. Method for detecting phosphates in water: Chemical reagents are incorporated into the water sample to be tested. After the reaction, the concentration can be directly measured by spectrophotometry.

9. Method for detecting nitrate nitrogen in water: Chemical reagents are incorporated into the water sample to be tested. After the reaction, the concentration can be directly measured by spectrophotometry.

10. Method for detecting nitrite nitrogen in water: Chemical reagents are incorporated into the water sample to be tested. After the reaction, the concentration can be directly measured by spectrophotometry.

11. Method for detecting sulfate in water: Chemical reagents are incorporated into the water sample to be tested. After the reaction, the concentration can be directly measured by spectrophotometry.

12. Method for detecting dissolved oxygen in water: Chemical reagents are incorporated into the water sample to be tested. After the reaction, the concentration value can be directly read using spectrophotometry.

13. Ozone detection method in water: Mix a water sample containing ozone with acidic indigo reagent. Ozone will cause blue color fading. The degree of decolorization is measured by absorbance at a wavelength of 610nm, and compared with the blank sample, the decrease is proportional to the ozone concentration. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

14. Method for detecting nickel content in water (dimethylglyoxime photometric method): In an ammonia solution, in the presence of oxidant iodine, nickel reacts with dimethylglyoxime to form a wine red soluble complex with a composition ratio of 1:4. The complex exhibits two absorption peaks at wavelengths of 440nm and 530nm. To eliminate interference from iron citrate, measurements can be taken at a slightly lower sensitivity wavelength of 530nm. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

15. The principle of detecting iron content in water is the diazophenanthrene spectrophotometric method. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

16. Method for detecting manganese content in water: After the sample is extracted with water or acid, divalent manganese in the test solution is oxidized to purple red permanganate ions using periodate in sulfuric acid phosphoric acid medium, and its absorbance is measured at a wavelength of 526nm. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

17. Principle of copper content detection in water: After digestion of water samples, copper ions react with sodium diethyldithiocarbamate in alkaline solution to form a brownish yellow complex, which is dissolved in carbon tetrachloride and quantitatively determined by comparison with standard series. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

18. Method for detecting chromium content in water: ① Determination of Hexavalent Chromium: Hexavalent chromium reacts with diphenylcarbazide in acidic solution to produce a purple red product, which can be determined by visual colorimetry or spectrophotometry Determination of total chromium: Trivalent chromium in the water sample is oxidized to hexavalent chromium using potassium permanganate. Excess potassium permanganate is decomposed using sodium nitrite, and excess sodium nitrite is decomposed using urea. The resulting clear solution is colored with diphenylcarbazide and its content is determined. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

19. Method for detecting zinc content in water: In a solution with pH 8.5-9.5, zinc reagent reacts with Zn2+to form a blue coordination compound, which has maximum absorption at a wavelength of 620nm and can be determined by spectrophotometry. Guanaoduo parameter detector, intelligent and fully automatic, parameters can be directly read.

20. PH value detection method: The glass electrode method is used to determine the pH value of water samples. A saturated calomel electrode is used as the reference electrode, a glass electrode is used as the indicator electrode, and a working battery is formed with the measured water sample. The working electromotive force is then measured using a pH meter, and the pH value is directly read by the pH meter. The glass electrode method is accurate and fast for measuring pH, and is less affected by factors such as water color, turbidity, colloidal substances, oxidants, reducing agents, and salinity.

21. TDS (Total Dissolved Solid Matter) detection method in water: The concentration of total dissolved substances in water, measured in milligrams per liter (mg/L), mainly reflects Ca2+, MG2+, Na+K in water+

The concentration of plasma has a good correlation with the hardness and conductivity of water. The smaller the TDS value, the higher the Ca2+MG2+Na+K in water+