C20C30 Chinese Karl Fischer Coulomb Method Moisture Analyzer Manual
2020-08-15 16:12:05
The new intelligent Coulometric C20 / C30 Chinese Karl Fischer Moisture Analyzer (Carbon Moisture Analyzer) uses electrochemical methods to determine the moisture content of substances by calculating the consumption of titrants that react with moisture. It has good sealing performance, high measurement accuracy, high degree of automation and statistical calculation functions, and is mainly used in petrochemical, pharmaceutical, cosmetics, food and other industries.
Instrument characteristics
Whether it is liquid, solid, or gas, the intelligent C20 / C30 Chinese Karl Fischer moisture analyzer is the best choice for samples with a water content of 1ppm-100%:
◠Moisture resolution 0.1ug, potential resolution 0.1 mV, accurate and reliable results One Click®
â— Intelligent identification of various accessories to prevent errors
◠Arbitrarily select 9 languages ​​including Chinese / English / German / French / Italian / Russian / Korean / Spanish / Portuguese TFT color touch screen operation interface
◠Print reports in 9 languages ​​that comply with GLP specifications
â— Intuitive, "building blocks" flexible editing method
â— Intelligently monitor the status of reagents and automatically replace reagents
â— LabX computer Chinese software and color touch screen control simultaneously or separately
â— Comprehensive and complete interface, standard Ethernet (Ethernet) and other interfaces
â— Real plug-and-play hardware connection, such as USB printer
â— Two kinds of electrolytic electrode with diaphragm and electrolytic electrode without diaphragm
â— Online 5 kinds of titration curve display and 5 kinds of curve GLP report
One-click operation of the Chinese color touch screen (One Click®) operation on the high-brightness TFT color touch screen, arbitrarily select the Chinese, English, German, French, Italian, Russian, Korean, Spanish, Portuguese, and other 9 language operation interfaces Meet your language habits. One-click (One Click®) operation on the personalized interface completes various daily tasks: determination of moisture in samples, replacement of solvents, etc.
Electrolytic electrode
Using Faraday's theorem, iodine that reacts with water is electrolyzed by the electrolysis electrode, and the electrolysis process is intelligently controlled (the electrolysis current of 400, 300, 200, and 100 mA is automatically switched). Two kinds of electrolytic electrodes (with and without diaphragm) are available to meet the testing needs of different samples. The maximum rate of iodine produced by electrolysis corresponds to 2,100 ug water / minute.
Using Faraday's theorem, iodine that reacts with water is electrolyzed by the electrolysis electrode, and the electrolysis process is intelligently controlled (the electrolysis current of 400, 300, 200, and 100 mA is automatically switched). Two kinds of electrolytic electrodes (with and without diaphragm) are available to meet the testing needs of different samples. The maximum rate of iodine produced by electrolysis corresponds to 2,100 ug water / minute.
Intelligent monitoring of reagent status (Solvent Manager)
Through Solvent Manager, One-click (One Click®) to achieve fully sealed waste drainage, add fresh reagents, etc., to avoid contact with toxic reagents and prevent the overflow of waste bottles. The C30 can also intelligently monitor the status of the reagents, and replace them automatically after the reagents fail.
Through Solvent Manager, One-click (One Click®) to achieve fully sealed waste drainage, add fresh reagents, etc., to avoid contact with toxic reagents and prevent the overflow of waste bottles. The C30 can also intelligently monitor the status of the reagents, and replace them automatically after the reagents fail.
"Building blocks" -style flexible method editing method can test insoluble samples with slow water release by homogenizer or external extraction; it can also use Stromboli automatic sample injector to achieve fully automatic moisture determination. The editing process of all test methods is intuitive, simple and flexible.
Comprehensive and complete modern interface instruments are equipped with Ethernet (Ethernet) interface, 3 USB ports, RS232 port, CAN BUS (field bus), TTL and other interfaces. All the attachments are hot plug and plug Ready to use.
When it is necessary to determine the water content of insoluble, insoluble or some problematic samples, the DO308 drying furnace can be connected to achieve accurate measurement. It is easy to operate and strong in safety, suitable for use in the moisture determination of the following types of samples:
â– Substances that release water during the gradual temperature rise, such as powder or granular plastic
â– Substances that react side-by-side with Kjeldahl reagents, such as oxidizing inorganic salts
â– Substances that cause problems in the titration vessel, such as fibers or sticky substances
â– Insoluble or insoluble substances, such as wool, dough, tar, coal and other substances
Technical Parameters
Polarized electrode interface
Measuring range
Polarization voltage: -2,000 ~ 2,000 mV / Polarization current: 0 ~ 24 μA
Resolution
Polarization voltage: 0.1 mV / Polarization current: 0.1μA
Maximum possible error
Polarization voltage: 2 mV / Polarization current: 1μA
measuring system
System drift value
Online measurement, <2 μg water / min
Measuring range
1 ppm to 100% moisture content sample
Measurement resolution
0.1 μg
Measurement repeatability
0.3% (> 1 mg water / sample)
Color touch screen
screen display
1/4 VGA, 5.7-inch high-brightness color TFT display
Resolution
320 x 240 pixels
Titrator size
Length x Width x Height, mm
About 340 x 210 x 312, about 3.3 kg
Use environment
Ambient temperature
+5 ~ + 40 ℃
Air humidity
Maximum humidity 80% at 31 ℃
Order information
no information yet
technical article
Method of moisture content test
Moisture content will affect the physical properties of substances, such as weight, density, viscosity, refractive index, electrical conductivity, etc. Chemical methods, thermogravimetry or loss-in-weight methods are commonly used to measure moisture content.
Why do you need to measure moisture content?
Most products contain moisture. Usually the amount of moisture does not matter, but for products that need to be sold and when the moisture content will affect some properties of the product, the moisture content needs to be tested:
-Shelf life of the product
-Powder products may solidify and agglomerate
-Product fluidity, viscosity
-The true content of the product
-Concentration or purity
-Requirements for commercialization (quality characteristics of composite products)
-Nutritional content of products
-Legality (food laws and regulations)
Products and solutions:
Most products contain moisture. Usually the amount of moisture does not matter, but for products that need to be sold and when the moisture content will affect some properties of the product, the moisture content needs to be tested:
-Shelf life of the product
-Powder products may solidify and agglomerate
-Product fluidity, viscosity
-The true content of the product
-Concentration or purity
-Requirements for commercialization (quality characteristics of composite products)
-Nutritional content of products
-Legality (food laws and regulations)
Products and solutions:
Karl Fischer titration method for measuring moisture content
Measuring principle:
Karl Fischer's method is a reference method for measuring the moisture content of many substances. It is based on the chemical analysis process of sulfur dioxide oxidation by iodine in methanol solution. Theoretically, the reaction proceeds as follows:
H2O + I2 + SO2 + CH3OH + 3RN-> [RNH] SO4CH3 + 2 [RNH] I
The titration process can be carried out by volume method or coulometric method.
Volumetric method: The Karl Fischer solution containing iodine is continuously added until there is a slight excess of elemental iodine. The consumed iodine is obtained by calculating the volume consumed by the Karl Fischer solvent containing iodine.
Coulometric method: The iodine participating in the reaction comes directly from the oxidation reaction of the iodide ions in the titration cup until there is a trace of excess elemental iodine. Faraday's law is used to calculate the amount of iodine produced in the electrolysis process.
Application: Karl Fischer titration is an ideal choice for moisture measurement, especially suitable for samples with high water content (volume method determination) and samples with ppm trace moisture content (coulometric method determination). The Karl Fischer method is commonly used for samples of organic solvents, but it is also suitable for soluble solid samples, or those solid samples in which water is easily released or extracted by heating.
Advantages: The reference method for the accurate measurement of the moisture content of the sample; the Coulomb method is also suitable for the measurement of trace moisture, and whether the test sample contains moisture.
Limitations: suitable for certain samples
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