Overview
EN 18207:2026 - "Algae and algae products - Determination of the uronic acids content of brown seaweed and alginate products" - is a European standard developed by CEN that outlines a reliable, standardized method for the quantitative determination of total uronic acids in brown seaweed and alginate products. Utilizing High Performance Anion Exchange Chromatography with Pulsed Amperometric Detection (HPAEC-PAD) after acid hydrolysis, this method allows for accurate measurement of individual uronic acids, specifically mannuronic, glucuronic, and guluronic acids in brown seaweeds and alginate products. The sum of these values provides the total uronic acid content, essential for quality analysis and product standardization in the algae and alginate industries.
Key Topics
- Sample Preparation: Specifies drying and grinding of samples (brown seaweed or alginate) to a fine particle size before analysis.
- Acid Hydrolysis: A controlled acid hydrolysis process prepares samples for chromatographic analysis, ensuring breakdown of the polysaccharide matrix to release uronic acids.
- HPAEC-PAD Analysis: High Performance Anion Exchange Chromatography coupled with Pulsed Amperometric Detection ensures precise separation and quantification of mannuronic, glucuronic, and guluronic acids in a single run.
- Calibration and Quantification: Utilizes standard calibration curves with known concentrations of uronic acids to ensure accuracy and reproducibility.
- Data Interpretation: Provides formulas for expressing results in grams per 100 grams of sample, supporting comparison across products.
- Precision and Repeatability: Results from interlaboratory studies are included to demonstrate method repeatability and reproducibility, increasing confidence in measurement reliability.
Applications
EN 18207:2026 is widely applicable across algae and alginate industries, supporting:
- Quality Control: Food, nutraceutical, and bioproduct manufacturers use the uronic acid content to assess the quality and consistency of brown seaweed and alginate raw materials.
- Product Development: Research and development teams benefit from standardized uronic acid measurement to formulate and optimize alginate-based products.
- Regulatory Compliance: Meeting the specifications of this standard facilitates compliance with European and international regulations for algae-derived products.
- Trade and Certification: Consistent methodology enables clear communication between suppliers and buyers, simplifying certification, specification writing, and international trade of alginate products.
- Research: Laboratories and academic institutions employ this standardized method for analytical studies involving brown seaweed and alginate composition.
Related Standards
- EN 17605:2022: "Algae and algae products - Methods of sampling and analysis - Sample treatment" - referenced for sample preparation procedures prior to uronic acid analysis.
- EN 17399:2024: "Algae and algae products - Vocabulary" - provides consistent terminology applicable to EN 18207:2026.
- ISO 5725-2 and ISO 5725-5: Standards on accuracy, repeatability, and reproducibility in measurement methods, referenced for statistical validation and method performance criteria.
Keywords: uronic acid determination, brown seaweed analysis, alginate quality control, HPAEC-PAD, algae products standardization, mannuronic acid, glucuronic acid, guluronic acid, CEN standards, sample preparation, chromatography, biobased product testing, algae industry compliance, European standards for algae.
By adopting EN 18207:2026, organizations ensure accurate, repeatable, and internationally recognized determination of uronic acid content in brown seaweed and alginate products, supporting both quality assurance and regulatory needs across multiple bio-based industries.