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.
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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.
ISO 17034 certificate: accreditation-certificate-ISO-17034-21-06-2019.pdf (sigmaaldrich.com)
ISO 17025 certifictae: 17025-en.pdf (sigmaaldrich.com)
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.
Benefits of using SmartChemicals
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