What are the characteristics of the Karl Fischer micromoisture analyzer?

1. Its operation is fully automated, and the titration environment is fully enclosed, which not only ensures the accuracy of the detection results, but also can titrate volatile, moisture-prone and harmful substances.

2. Large LCD screen (8 inches), widening the viewing angle, more convenient for observation.

3. It can realize direct touch screen operation, which is more flexible.

4. Parallel simultaneous measurement function, which can control two instruments to work separately at the same time.

5. Built-in CF (CompactFlash) board slot for increasing user interface, using CF memory card, unlimited storage and storage of data parameters.

6. The operating unit can be easily separated from the measuring unit, and the separable measuring unit is convenient and useful for those samples that need to be separated from the operating unit.

7. The titration curve can be displayed in real time, and the user can observe the titration process in real time through the display screen.

8. The standard reagent injector saves the trouble caused by the replacement of Carl Fischer reagents.

9. Fully compliant with GLP GMP support function rapid moisture analyzer, Karl Fischer moisture analyzer.

10. The test results of the use of reference materials in the titration unit are automatically archived as a series of records for reference, and the display screen automatically prompts you to carry out periodic inspections and replace reagents as planned in time.

11. The accelerated electrolysis method is used to measure twice the time faster than before, and the pre-titration and sample measurement time are twice faster than before due to the accelerated electrolysis method.

13. The endpoint detection patent technology using the KEM liquid impedance compensation principle eliminates the need to adjust the electrode sensitivity and endpoint potential for individual solutions and sample types.

The trace moisture analyzer produced by Huatian Electric Power is controlled by a micro enterprise computer, and the color large-screen LCD Chinese menu display, the man-machine dialogue is more intuitive, the operation is simpler, and the sensitivity of the system test method is greatly improved compared with similar instrument technology. Analyze the measurement results with high speed, high accuracy, automatic calculation of percentage, ppm content, moisture content, as well as automatic printing, self-diagnosis of equipment failure, long-term storage and other functions. It is the main instrument for automatic analysis.

Micro-water meters can be used to determine water in a variety of organic and inorganic substances. Due to the different properties of various compounds, they can be divided into two categories: those that can be directly determined and those that cannot be directly determined. Typical are the following substances.

1.Hydrocarbon organic compounds pentane, hexane, dimethylbutane, methylated to butadiene, benzene, toluene, xylene, ethyl oxide toluene, dimethyl styrene, octane, dodecane, tedecane, eicosane, octane, petroleum ether, gasoline, cyclohexylamine, methylcyclohexylamine, cycloheptane, ethylenecyclohexylamine, cyclododecane, decylcyclohexane, dicyclopentadiene, dimethylnaphthalene, trimethyl through styrene, biphenyl, dihydroacenaphthene, fluorene, methylenephenanthrene, isomethylisopropylbenzene, etc.

2.Oil, hydraulic oil, insulating oil, transformer oil, turbine oil.

3.Alcohols monools, polyols, phenols (all).

4.Halogenated hydrocarbons (all).

5.Phenol, cresol, fluorophenol, chlorophenol, dichlorophenol, nitrophenol, etc.

6.Lipids (all).

7.Diethyl ether, diethylene glycol monomethyl ether, diethylene glycol diethyl ether, polyethyl ether, benzyl ether, fluorphenyl ether, iodophenyl ether, didecyl ether, diheptyl ether.

8.Acids Carboxylic acids, carboxylic acids, amino acids, sulfonic acids.

9.Anhydride and acetic anhydride, benzoyl chloride.

10.Sulfides contain sulfur compounds, thiocyanates, thioethers, sulfoxanthanes, dithiocarbamates.

The trace moisture analyzer produced by Huatian Electric Power is your trusted choice, and all power workers are welcome to consult.

Principle of Trace Moisture Analyzer:

The reagent solution is a mixture of dominant iodine and pyridine and methanol filled with sulfur dioxide. The principle of the reaction between Karl-Fischer reagent and water is that when water is present, iodine is reduced by sulfur dioxide, and in the presence of pyridine and methanol, pyridine hydroiodate and pyridine methyl sulfate are generated.

The reaction formula is: H20+I2+SO2+3C5H5N 2C5H5N·Hi+C5H5N·SO3 ......1)

c5h5n·so3+ch3oh → c5h5n·hso4ch3 ……2)

During electrolysis, the electrode reacts as follows:

Anode: 2i- -2e i2 ......3)

Cathode: 2h+ +2e h2 ......4)

The iodine produced by the anode reacts with water to form hydroiodic acid until all the water is reactive, and the end point of the reaction is indicated by a detection unit composed of a pair of platinum electrodes. According to Faraday's law of electrolysis, the number of molecules of iodine participating in the reaction is equal to the number of molecules of water, which is directly proportional to the amount of charge. The equation between the amount of water and the amount of charge is established as follows:

w=q/ ……5）

Where: w -- the moisture content in the sample Unit: micrograms.

q -- Electrolytic quantity unit: millicoulombs.

The working principle of the trace moisture analyzer is actually different from the principle of other instruments, after all, the substances detected are different, the application fields are different, and its functional structure may be different, so when we choose products, we should also choose a more ideal instrument according to the current situation, so what is its principle? Let's find out.

Everyone knows that the principle of the trace moisture analyzer is to use the Karl Fischer Coulomb titration method to detect, the application of microcomputer automatic control technology, the use of large screen LCD screen, full Chinese menu prompt operation, rich calculation, printing experimental results function, is the oil and power industry and scientific research institutions to test the ideal instrument for moisture content.

Karl Fischer titration method is a method of measuring the moisture of a sample with methanol as the medium and Karl Fischer as the titration solution. This method is simple to operate and highly accurate, and is widely used in petroleum, dyes, grain and other fields. It is especially suitable for samples that are easily destroyed when exposed to heat, and can be used to measure not only free water, but also bound water, and is often used as a standard analysis method for moisture, especially trace moisture.

However, it is not suitable for samples containing strong reducing substances such as VC.

When the concentration is above, the reverse reaction can occur. If we allow the reaction to proceed in a positive direction, an appropriate alkaline substance needs to be added to neutralize the acid formed during the reaction. It has been experimentally proven that the addition of pyridine to the system allows the reaction to proceed to the right.

Experiments have proved that pyridine is a more suitable reagent, and pyridine can also combine with iodine and sulfur dioxide to reduce the vapor pressure of the two.

The rapid moisture analyzer has a beautiful appearance, with automatic weighing, automatic validity, diversified drying methods and other functions, the rapid moisture meter measures the weight of the sample at the same time, the heating unit and the water evaporation channel quickly dry the sample.

The trace moisture analyzer can measure the moisture content of three forms of samples: liquid, solid, and gaseous. When measuring liquid samples, select a suitable injector, then fill the sample, and inject the sample below the liquid level under the condition of ensuring that the injector does not contain water, and the instrument will start counting and record the measured value after reaching the endpoint. For the measurement of solid samples, it is only necessary to select the appropriate injection amount according to the water content of the solid sample, and use the weight reduction method to weigh and inject the sample.

For the determination of gas samples, a small container is selected, the sample is loaded, and the closed needle is connected to the container, and a miniature pressure reducing valve can be connected in series in the middle.

First, its operation is very simple, like many people who have not used a trace moisture analyzer before think that it is a very difficult operation, and many different data need to be set to achieve a very good detection result during operation, but it is not as everyone thinks. Because the whole operation of the trace moisture analyzer is relatively simple, you only need to set the basic data to be directly detected, and all the data can be detected within a few minutes, and it can also be understood from the LED display.

Second, the quality of the trace moisture analyzer is relatively good, and some analyzers will have production problems after being used for a period of time, which will directly affect it, and some will even lead to more problems in the analyzer. However, this problem will not occur when choosing a trace moisture analyzer, because its entire structure is very compact, which can ensure very good performance when used, and ensure that the whole detection is very stable and will not have intermittent problems. Therefore, it is also possible to understand that the trace moisture analyzer in the market does have its own advantages, and it is indeed very suitable for the testing needs of different factories.

Of course, when buying a trace moisture analyzer, you also need to start from different details, find a really suitable one, have good test results, and restore the production efficiency of the factory.

Respondent: Huatian Power.

A trace moisture analyzer is a measuring instrument, in addition to being able to measure water, this instrument can also measure other liquids, many people do not know, in order to use the measuring instrument better, we need to introduce the following for you.

1) Sampler selection: choose the appropriate sampler according to the water content and viscosity of the sample, and choose 100ul or 50ul microsyringe for high water content and low viscosity samples; Microsyringes can be used for low-viscosity samples; Samples with high water content and high viscosity can be selected with a 1 ml syringe. The sample density is known to be injected into the volume, and when the density is unknown, a weighing sample is used.

2) First, fill up the sample to be tested with the injector and wash the injector 5-8 times (Note: When the 1 ml injector pushes the sample outward, attach the needle; When the sample is replaced, the injector should also be cleaned with the sample to be measured), make sure that there is no water in the injector, then, according to the water content, draw a certain amount of sample, wipe the needle with filter paper, press the start button, inject the sample below the liquid level, start counting the instrument, record the measured value after reaching the endpoint, and convert the ppm value or percentage content.

If you want to measure liquids with a fully automatic trace moisture analyzer, you must master the above skills. The long-lasting use of the instrument is proficient in the use of this instrument.

Respondent: Huatian Power.

High precision, fast testing, high degree of automation, but the user must be proficient. The coulometric moisture meter mainly tests non-conductive liquids. Solids with large water content are dried by drying method. Others, like tobacco or something, have a dedicated moisture meter. Zibo Shengkang Electric.

It is generally used to detect items with low moisture content, mainly chemical methods, physical methods are relatively rare, and the requirements for users are higher, and they are generally more expensive.