With the development of science and advances in production technology, quantitative analysis of water has been listed as one of the basic items of physical and chemical analysis of various substances, as an important quality indicator of various substances. Different requirements for determining moisture are proposed based on the different moisture content of the different forms of the sample. The moisture measurement can be the control analysis of industrial production, or the quality signing of industrial and agricultural products; the moisture can be measured from the tons of products, and the moisture analysis can be carried out in the laboratory using only a few microliters of test solution; A constant moisture analysis with a water content of several to several tens of percent, or a trace moisture analysis with a water content of only one part per million or less.
Moisture analysis methods can generally be divided into two broad categories, namely physical analysis and chemical analysis. The classical moisture analysis method has been gradually replaced by various moisture analysis methods. Currently, the main moisture analyzers on the market mainly include Karl Fischer moisture analyzer , infrared moisture meter, dew point moisture meter, microwave moisture meter and Coulomb moisture meter. And some special moisture meters. These instrumentation methods are simple to operate, highly sensitive, and reproducible, and can be continuously measured to automatically display data.
Foreign moisture analyzers have certain advantages in terms of accuracy and stability, but they are expensive and cannot be tolerated by some domestic laboratories and enterprises. In recent years, many domestic instrument manufacturers have strengthened the research and practice of moisture analyzers, and have achieved very obvious benefits. The technologies of domestic moisture analyzers are close to the international standards and can meet the needs of general laboratories and enterprises.
Karl Fischer's classical method has been improved in recent years, greatly improving the accuracy and expanding the measurement range. It has been listed as the standard method for moisture determination in many substances. In recent years, the more active imported Karl Fischer moisture analyzers in the domestic market are French Reyes, Metrohm, METTLER TOLEDO, Germany, SCHOTT, Kyoto, Japan; domestic Karl Fischer moisture analyzers are mainly Haidian Chaosheng, pioneer Weifeng, Jiangsu Jianghuan Analytical Instrument Co., Ltd., etc.
The infrared moisture analyzer is simple in operation, less time consuming, and accurate in measurement results. Therefore, the infrared moisture meter can be widely used in the experimental analysis and daily purchase control and process detection of chemical, pharmaceutical, food, tobacco, grain and other industries. Major manufacturers include Omnimark of the United States, Fisher of the United States, Raytek of the United States, Omnimark of the United States, Sartorius of Germany, Kett of Japan, Zhiqiao Science and Technology, Shanghai Precision Scientific Instrument Company, Beijing Institute of Chemical Metallurgy, Nuclear Industry, Beijing Jiuru Instrument Co., Ltd., etc.
The dew point moisture analyzer is easy to operate, the instrument is not complicated, and the measured results are generally satisfactory, and are often used for the determination of trace moisture in permanent gases. However, this method has a lot of interference, and some of the cold-changing gases will interfere with the condensation of water vapor especially at higher concentrations. Producers include Shaw, UK, AMETEK, etc.
Coulomb moisture analyzers are commonly used to determine the moisture content of a gas. This method is easy to operate and has a fast response. It is especially suitable for the determination of trace moisture in gases. If it is measured by general chemical methods, it is very difficult. However, the electrolysis method is not suitable for the determination of basic substances or conjugated diolefins. Producers include Chengdu Instrument Factory, Jiangsu Jianghuan Company, Daqing Rishang, etc.
The microwave moisture analyzer uses the microwave field to dry the sample and accelerates the drying process. It has the characteristics of short measuring time, convenient operation, high accuracy and wide application range. It is suitable for granular materials such as grain, paper, wood, textiles and chemical products. The determination of moisture in powdery and viscous solid samples can also be applied to the determination of moisture in petroleum, kerosene and other liquid samples. Manufacturers include CEM in the United States, Omnimark in the United States, and Changsha Youxin.
In addition, some special moisture analyzers have become more and more prominent in the market. This moisture analyzer has the advantages of specificity and simple operation. It is widely used in online control analysis of industrial production, and the quality of industrial and agricultural products. Such as oil moisture analyzer, soil moisture analyzer, tobacco moisture analyzer, grain moisture analyzer, wood moisture analyzer, concrete moisture analyzer, paper moisture analyzer and so on.
Moisture analysis methods can generally be divided into two broad categories, namely physical analysis and chemical analysis. The classical moisture analysis method has been gradually replaced by various moisture analysis methods. Currently, the main moisture analyzers on the market mainly include Karl Fischer moisture analyzer , infrared moisture meter, dew point moisture meter, microwave moisture meter and Coulomb moisture meter. And some special moisture meters. These instrumentation methods are simple to operate, highly sensitive, and reproducible, and can be continuously measured to automatically display data.
Foreign moisture analyzers have certain advantages in terms of accuracy and stability, but they are expensive and cannot be tolerated by some domestic laboratories and enterprises. In recent years, many domestic instrument manufacturers have strengthened the research and practice of moisture analyzers, and have achieved very obvious benefits. The technologies of domestic moisture analyzers are close to the international standards and can meet the needs of general laboratories and enterprises.
Karl Fischer's classical method has been improved in recent years, greatly improving the accuracy and expanding the measurement range. It has been listed as the standard method for moisture determination in many substances. In recent years, the more active imported Karl Fischer moisture analyzers in the domestic market are French Reyes, Metrohm, METTLER TOLEDO, Germany, SCHOTT, Kyoto, Japan; domestic Karl Fischer moisture analyzers are mainly Haidian Chaosheng, pioneer Weifeng, Jiangsu Jianghuan Analytical Instrument Co., Ltd., etc.
The infrared moisture analyzer is simple in operation, less time consuming, and accurate in measurement results. Therefore, the infrared moisture meter can be widely used in the experimental analysis and daily purchase control and process detection of chemical, pharmaceutical, food, tobacco, grain and other industries. Major manufacturers include Omnimark of the United States, Fisher of the United States, Raytek of the United States, Omnimark of the United States, Sartorius of Germany, Kett of Japan, Zhiqiao Science and Technology, Shanghai Precision Scientific Instrument Company, Beijing Institute of Chemical Metallurgy, Nuclear Industry, Beijing Jiuru Instrument Co., Ltd., etc.
The dew point moisture analyzer is easy to operate, the instrument is not complicated, and the measured results are generally satisfactory, and are often used for the determination of trace moisture in permanent gases. However, this method has a lot of interference, and some of the cold-changing gases will interfere with the condensation of water vapor especially at higher concentrations. Producers include Shaw, UK, AMETEK, etc.
Coulomb moisture analyzers are commonly used to determine the moisture content of a gas. This method is easy to operate and has a fast response. It is especially suitable for the determination of trace moisture in gases. If it is measured by general chemical methods, it is very difficult. However, the electrolysis method is not suitable for the determination of basic substances or conjugated diolefins. Producers include Chengdu Instrument Factory, Jiangsu Jianghuan Company, Daqing Rishang, etc.
The microwave moisture analyzer uses the microwave field to dry the sample and accelerates the drying process. It has the characteristics of short measuring time, convenient operation, high accuracy and wide application range. It is suitable for granular materials such as grain, paper, wood, textiles and chemical products. The determination of moisture in powdery and viscous solid samples can also be applied to the determination of moisture in petroleum, kerosene and other liquid samples. Manufacturers include CEM in the United States, Omnimark in the United States, and Changsha Youxin.
In addition, some special moisture analyzers have become more and more prominent in the market. This moisture analyzer has the advantages of specificity and simple operation. It is widely used in online control analysis of industrial production, and the quality of industrial and agricultural products. Such as oil moisture analyzer, soil moisture analyzer, tobacco moisture analyzer, grain moisture analyzer, wood moisture analyzer, concrete moisture analyzer, paper moisture analyzer and so on.
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