What are the classifications of moisture analyzers, and the difference between moisture analyzers an

Classification of moisture meters:

According to the principle of determination, it can be divided into two categories: physical determination method and chemical determination method.

Physical determination methods are commonly used by weight loss method, distillation layering method, and gas chromatography analysis method.

The chemical determination methods mainly include Karl Fischer method (Karlfischer), toluene method, etc., and the International Organization for Standardization puts Karlfischer.

Fischer (Karl

fischer) method is set as the international standard for measuring trace moisture, and our country has also set this method as a national standard.

Measure the trace amount of water.

Common weight-loss moisture meters include halogen moisture determination, infrared moisture analyzer, microwave moisture analyzer, etc.;

Common Karl Fischer titrators mainly include volumetric Karl Fischer titrator and Coulometric method.

Electricity Act) Karl.

Fischer moisture analyzer.

Moisture determination can be cost and quality control in industrial production, as well as the quality of industrial and agricultural products.

Testing, the application industry is very wide, such as food, food, feed, plastics, environmental protection, textile, medicine, tobacco, chemical industry, etc

Agriculture and forestry, etc., all need to use moisture meters.

There are mainly halogen moisture meters, Karl Fischer moisture meters, portable moisture meters, Karl Fischer is the most accurate but the highest, followed by halogens ** cheaper, the accuracy is lower than Karl Fischer , portable is not very accurate, but the speed is fast ** cheap, you can consult Yangzhou Acricred moisture meter.

Let's start with two aspects: moisture and moisture

1. The difference between basic definitions.

Moisture refers to the water contained in an object, or the unreal components contained in a certain situation, and the scope is very broad, spanning objectology, biology, climatology, sociology, etc.

Moisture refers to the ratio of the mass of water contained in a substance to the total mass, usually expressed as a percentage, and is often used as a laboratory indicator to provide a basis for production and treatment.

2. The focus is different.

Moisture is suitable for a variety of contexts, metaphorically describing the unrealistic and exaggerated elements of the narrative.

Moisture is used less because "moisture" focuses on the proportion of water in an object. Specifically refers to the amount of water.

Water Respect and Conversion of Water.

Water can be replaced by water, and water cannot be guessed as water. For example, if vegetables contain a lot of "water", "water" cannot be written as "water", and good soil moisture means that there is more water in the soil, and "water" here cannot be written as "water".

Let's take another example to illustrate the difference between salt and salt, which is basically similar to the difference between water and water.

Speaking of which, I believe that friends should be able to clearly distinguish between moisture and moisture. When it comes to moisture analyzers and moisture analyzers, they can be used interchangeably. Moisture analyzers can be widely used in all industries that need to quickly measure moisture, and it can also be said that moisture analyzers can be widely used in all industries that need to quickly measure the moisture level, and vice versa.

Medicine, plastics, chemicals, food (surimi, dehydrated vegetables, meat and aquatic product processing, noodles, flour, biscuits, moon cakes, etc.), grain, feed, seeds, rapeseed, tobacco, tea, textile, agriculture and forestry, papermaking, rubber, textile, powder and other 、、、

1. Heating side defeat method;

2. Chemical methods;

3. Microwave; 1. It is widely used in the industry;

2. Fully automatic test mode;

3. Granules and powders are operated by a dry ambush machine;

4. High efficiency and fast speed;

5. No installation, commissioning and training are required;

6. It is not affected by the environment, temperature and humidity, and no auxiliary equipment is required;

7. Principles of National Standards Law;

Before use, the cell should be cleaned of all dirt. After washing, it is left to dry in an oven at about 20 °C for 1 hour and then allowed to cool naturally. Clean the electrolytic electrode and the measuring electrode with methanol or acetone, note that these two pairs of electrodes should not be cleaned with water, otherwise the measurement error will be caused in the process of measuring the moisture of the sample.

After the electrolytic cell is processed, the stirring rod is put into the anode chamber, and then clamped on the gripper of the stirrer, and then evenly coated with a thin layer of vacuum grease at the grinding mouth of the electrolytic electrode, measuring electrode, drying tube, injection and sealing plug, installed on the corresponding part, and gently rotated a few times to make it better sealed. After completing the above work, remove the drying tube of the anode chamber, inject about 100-120 ml of electrolyte into the anode chamber with a dried funnel through the sealing port, and inject about 5 ml of electrolyte into the cathode chamber.

Missing tools for operation: moisture meter.

The operation method of using the moisture meter is as follows:

1. First adjust the water balance, before starting, observe whether the small blister in the volcanic balance of the level at the front end of the moisture meter is in the center of the ring, if not, adjust the bottom adjustment nut of the moisture meter to make the blister in the center of the ring, and adjust the instrument by the left hand, on the contrary, the right hand is lowered.

2. Boot preheating, due to the high accuracy of the 1/10,000 moisture meter, it takes at least half an hour to preheat when the machine is turned on for the first time or after a long time of power failure and idleness. Therefore, under normal circumstances, the laboratory moisture meter should avoid frequent power cuts.

3. Finally, start weighing, press the start key to open the instrument, wait for 10 seconds, and the instrument will complete the start-up process by itself. When the screen shows 0, it indicates that the moisture meter is fully powered on and ready to be measured, and it can be weighed and dried in the loose hosiery row. Spread a layer of fiberglass paper on the weighing tray first, press the zero button on both sides of the display to reset the weight to zero, and when the display shows 0, add the reagent to be measured on the weighing paper to weigh.

After the test, press the ON key to turn off the display.

Moisture analyzer cleaning precautions:

1. Before cleaning, the power cord should be unplugged.

2. Do not use corrosive detergents, it is recommended to use alcohol or mild solvents.

3. Be careful not to splash water or other liquids into the moisture meter when cleaning.

4. After cleaning, wipe the moisture meter with a soft cloth that does not dry and does not shed hair.

5. It cannot be used to test samples that can produce dangerous chemical reactions, cause ** or produce toxic gases when drying.

6. It cannot be used in the surrounding environment with flammable gases, so as not to cause fire and fire. <>

Difference between volume method and coulomb method.

Determination principle of Karl-Fischer volumetric water determination:

The determination of moisture content by the Karl-Fischer volumetric method is mainly based on the electrochemical reaction: i2 2eó2i-

When both I2 and I- are present in the solution of the reaction cell, the reaction takes place simultaneously at both the positive and negative ends of the electrode, i.e. i2 is reduced on one electrode and i- is oxidized on the other, so that there is an electric current passing between the two electrodes. If there is only i- and no i2 in the solution, no current passes between the two electrodes.

Karl-Fischer reagent contains active ingredients such as pyridine and iodine, which can be measured and dropped into the reaction cell, and can have the following chemical reaction with the water in the solution to be measured

h2o＋so2＋i2＋3c5h5n→2c5h5n·hi＋c5h5n·so3

c5h5n·so3+ch3oh→c5h5n·hso4ch3

c5h5n·hi→c5h5n·h++ i-

The reaction continues with the continuous consumption of water to produce i- until the end of the titration of the reaction, when the water is consumed. At this time, there is a trace amount of unreacted Karl Fischer reagent in the solution, so that the presence of I2 and I- at the same time, the solution between the two platinum electrodes begins to conduct electricity, and the current indicates that the end point is reached, and the titration is stopped. The water content in the solution is thus calibrated by measuring the volume (volume) of the consumed Karl Fischer reagent.

The determination principle of the Karl Fischer Coulometric method (electric power method).

The electric power method is based on the fact that after dissolving the sample in the electrolyte of a special solvent containing a certain amount of iodine, the water consumes iodine, but the required iodine is no longer titrated with the iodine-containing reagent that has been calibrated, but through the electrolysis process, the iodine ions in the solution are anodicized to iodine: 2i--2e-i2

The resulting iodine reacts with the water in the sample. Its endpoint is indicated by a double platinum electrode. When the iodine concentration in the electrolyte returns to the original concentration, the electrolysis is stopped. Then according to Faraday's law of electrolysis:

The moisture content of the sample to be tested is calculated.

The principle and purchase of moisture meter.

I saw this on the Internet, and I don't know if it's or not.

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.

Moisture analyzer is used in the industrial field to measure the water content of samples, through the moisture analyzer can effectively solve industrial problems, to achieve normal production.

Moisture Analyzer Moisture analyzer principle.

The moisture analyzer uses the Karl-Fischer Coulometric method to determine the water content in the sample. It is a new type of instrument that is improved, perfected and improved on the basis of summarizing our company's many years of experience in producing trace moisture analyzers. Using microcomputer control, color large screen LCD Chinese menu display, man-machine dialogue is more intuitive, moisture analyzer operation is simpler, compared with similar instruments, greatly improve the test sensitivity.

It has the functions of fast analysis speed, high accuracy, automatic calculation of percentage content, ppm content, moisture content and automatic printing, self-diagnosis of instrument failure, and long-term storage of measurement results. It is a high-efficiency, fully automatic analytical instrument.

Moisture analyzer features:

The moisture analyzer has a Chinese display of the titration process, which can be input and output in Chinese and English.

Color LCD screen display, graphical interface, simple and convenient operation, easy to master; Touch screen input, just a click to complete the complex inspection process independently.

The titration table of the moisture analyzer implements a fully enclosed design, which can automatically change the solvent and avoid the contact between the chemical reagent and the human body.

Depending on the environmental conditions of the experiment, you can set "automatic" or "manual" drift value background deduction to ensure more accurate analysis results.

The titration results of the titrator can be output in the format required by GLP GMP, and the stored titration results can be statistically analyzed, and the results report can be printed out by connecting to Chinese and English micro printers.

The titrator is supplied with titration monitoring software that monitors the entire titration process and can be upgraded with the software.

The moisture analyzer can be used in quality inspection or scientific research and teaching in many industries such as pharmaceutical industry, food, geology and chemical industry, petrochemical industry, daily chemical industry, agriculture, environmental protection, water treatment and so on.

What products do you test, there are many types of moisture analyzers, different types of moisture analyzers, the principle is different, specifically ask Shenzhen Agri moisture analyzer.

The principle of moisture analyzer, Shenzhen Agri moisture analyzer is a high magnetic field principle, the moisture value can be read out by contacting the sample, which is small, convenient and fast.

There are several principles of moisture analyzer, the most common is the weightlessness method, drying the moisture in the sample, and the reduced mass is the moisture quality.

The moisture tester is a new generation of halogen rapid moisture analyzer developed by the principle of loss-on-drying method. During the drying process, the moisture tester continuously measures and displays the moisture content of the sample in real time%, and after the drying procedure is completed, the final measured moisture content value is locked and displayed, and the change in the quality of the sample before and after drying is directly calculated to obtain the moisture content.

Qingdao Haiyi Instrument Co., Ltd. is a professional comprehensive enterprise that provides analysis and testing solutions for analytical chemistry laboratories such as food safety, environmental testing and material analysis. The company's HX-M001D moisture tester is widely used in grain, feed, tobacco, papermaking, food (dehydrated vegetables, meat, noodles, flour, biscuits, pies, aquatic processing), tea, beverages, grains, chemical raw materials, pharmaceutical raw materials, textile raw materials and other industries to test the free water contained in the samples.