Accurate water determination with Karl Fischer titration is an important analytical method used in many industrial segments like Pharma, Food & Beverages, Cosmetics, Petrochemicals and Technical industries to ensure high quality of the products they produce. Using our Aquastar® Karl Fischer reagents and standards the water content of solids, liquids and gas samples can be determined fast, easily and with a high degree of accuracy. Our sophisticated, high-quality Aquastar® portfolio comprises of volumetric and coulometric Karl Fischer reagents and appropriate water standards, Certified Reference Materials (CRMs) according to ISO 17034.
The volumetric Karl Fischer Titration method is used to determine the water content accurately by adding iodine-containing titrants to the sample. The sample needs to be dissolved in an appropriate solvent to release the water completely. This method can be used to determine water contents from 0.01 % up to 100 %, and promotes fast, precise, and reproducible results. With our Aquastar® Karl Fischer Reagents, we offer a complete range of high-quality volumetric Karl Fischer Reagents, one- and two-component reagents, and some specialties for specific samples. All titrants and solvents do not contain chloroform.
Coulometric Karl Fischer Titration is preferred for liquid samples with very low water content, typically in the range of 10 ppm to 10.000 ppm. It is a direct method, and the required iodine is generated during the titration process. Our distinguished Aquastar® range of Coulometric Karl Fischer reagents are available for titration cells with and without a diaphragm. All our coulometric reagents are chloroform-free.
The Aquastar® portfolio contains a broad range of excellent water standards for titer determination, monitoring Karl Fischer equipment, and verifying measured results. Our Aquastar® Water Standards are CRMs (Certified Reference Materials) in accordance with ISO 17034 and are measured using validated procedures in our DIN EN ISO/IEC 17025 accredited laboratory. To maintain transparency, we provide a batch-specific certificate of analysis for quality management (QM) documentation.
Our innovative SmartChemical portfolio enables a connection between the reagents, standards and the titrator. Our Aquastar® Karl FischerTitrants and Aquastar® Water Standards, as well as our Titripur® Volumetric Solutions and Certipur® Volumetric Standards transmit data wirelessly to the titrator. A brief touch on the SmartChemical RFID (Radio Frequency Identification) tag, integrated in the label, eliminates transmission errors, saves time, protects data, and increases efficiency.
The article describes Karl Fischer titration (coulometry with oven and direct volumetric titration with external extraction) in comparison to the loss on drying method for accurate determination of water content in hemp samples.
For volumetric and Karl Fischer titration, with our new SmartChemicals you can eliminate time-consuming steps and errors by transferring data wirelessly and instantly to your titrator.
Karl Fischer titration using our Aquastar® reagents and standards allows for easy and highly accurate water content determination in gases, liquids and solids. It is not without reason that no other method is as widespread as this one: determination of water content according to Karl Fischer is rapid, accurate and reliable; it is therefore the method of choice for quality and in-process control, production, and research and development.
The United States Drug Enforcement Administration (DEA) controls specific chemicals under the Domestic Chemical Diversion Control Act of 1993. SigmaAldrich requires customers to complete a Sigma-Aldrich DEA List I and II Chemical Authorized Purchaser form for specific transactions before selling DEA regulated chemicals.
Accurate Water Determination with Aquastar® reagents and standards for precise Karl Fischer titration results.
Tips and tricks to completely release water from samples using internal extraction, external extraction and Karl Fischer oven method for accurate determination of water content by Karl Fischer titration method.
Method designed to determine very low levels of water in samples.
Accurate water determination results with the Karl Fischer method in samples containing aldehydes or ketones
Supelco® SmartTitrants and SmartStandards provide instant and seamless data transfer via RFID tags.
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