Automatic Karl Fischer moisture analyzer

NegotiableUpdate on 05/06

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Overview

The Karl Fischer moisture analyzer is a precision instrument based on the Karl Fischer reaction principle, used for quantitative analysis of moisture content in samples. When the moisture in the sample comes into contact with Karl Fischer reagent, it undergoes a quantitative reaction with iodine and sulfur dioxide in the reagent, producing pyridine iodide and pyridine bisulfite.

Product Details

Automatic Karl Fischer moisture analyzerIt is a precision instrument based on the Karl Fischer reaction principle, used for quantitative analysis of moisture content in samples.

Working principle

Reagent composition: Karl Fischer reagent is mainly composed of iodine, sulfur dioxide, organic bases (such as pyridine), and solvents (such as methanol). Among them, iodine and sulfur dioxide are responsible for reacting with water, while organic bases act as catalysts and solvents to ensure the smooth progress of the reaction.

Reaction process: When the water in the sample comes into contact with Karl Fischer reagent, the water will undergo a quantitative reaction with iodine and sulfur dioxide in the reagent, producing pyridine iodide and pyridine bisulfite. This reaction is quantitative, meaning that one mole of iodine is consumed per mole of water molecule. In order to make the reaction proceed to the right, anhydrous pyridine is usually added to absorb the generated sulfurous acid, ultimately forming a stable product.

Titration process: Introduce the sample to be tested into the titration cell and ensure that the sample is thoroughly mixed with Karl Fischer reagent using a stirrer. The titration pump automatically adds Karl Fischer reagent to the titration cell until the water reaction is complete. This process is monitored in real-time by a potential measurement system. When the titration endpoint is reached (i.e. the water reaction is complete and there is no remaining iodine), the potential suddenly changes and the instrument stops titration.

Electricity measurement and data analysis: The built-in electrode system of the instrument detects the changes in electricity generated by the reaction, thereby calculating the moisture content in the sample. The instrument outputs the measurement results in digital form, allowing operators to easily read and record the data.

Main features

High precision: It can accurately measure extremely low concentrations of moisture, as low as 1ppm, with measurement accuracy typically reaching the microgram level, and can also accurately detect samples with low moisture content.

Fast: It can complete measurements in a short period of time, suitable for rapid detection needs, and results can generally be obtained within a few minutes.

High degree of automation: Most modern Karl Fischer moisture meters have functions such as automatic sample addition and automatic titration, reducing human errors and improving testing efficiency and accuracy.

Safety and environmental protection: Many devices are designed with sealing systems to reduce the leakage of harmful substances, protect the environment and the health of operators.

Strong adaptability: Suitable for various forms of samples, including solids, liquids, and gases.

Compliant with standards: Compliant with the requirements of multiple international standards such as ISO and ASTM, ensuring the international universality and comparability of measurement results.

Application fields of Karl Fischer moisture analyzer

Chemical industry: used to detect moisture in chemical raw materials and products, such as plastics, rubber, coatings, etc., to help chemical enterprises monitor the moisture content in raw materials and finished products, optimize production processes, and improve product quality.

Pharmaceutical industry: The active ingredients of drugs are often closely related to their moisture content, which can effectively detect the moisture content in drugs to ensure their stability and efficacy, meeting strict industry standards and regulatory requirements.

Food industry: In the food industry, moisture content is a key factor affecting food quality and shelf life. This instrument can quickly and accurately detect the moisture content in meat, dairy products, grains and other foods to ensure the safety and freshness of the products.

The oil and gas industry: In the production and refining process of oil and gas, moisture has a significant impact on the quality of products and the operational status of equipment. The use can effectively monitor the moisture content in raw materials, reduce corrosion, precipitation and other problems, and improve production efficiency.

Powder metallurgy and materials science: In the production process of metals, ceramics, and other materials, excessive moisture may cause product cracks or deformation. It can help manufacturers timely understand the moisture content of materials, so as to take appropriate measures to control and improve the strength and stability of products.

Environmental protection field: used to determine the moisture content in soil, solid waste, and other environmental samples, providing important data support for environmental protection work.

In the field of agriculture, we assist farmers in determining the moisture content in seeds and crops to optimize irrigation and increase crop yields.