ISO 11905, all parts: Water quality - Determination of nitrogen94 laboratories in Germany are accredited by DAKKS for at least one part of ISO 11905. Each lab card shows which parts it holds. These labs commonly handle Water, Effluent matrices. Most frequently tested analytes via this method in Germany: Chemischer Sauerstoffbedarf (Csb), Biologischer Sauerstoffbedarf (Bsb 5), Gesamter Gebundener Stickstoff. From the accredited scope text: “ISO 11905 -1 (H 36) 1998-08 Wasserbeschaffenheit -Bestimmung von Stickstoff - Teil 1: Bestimmung von Stickstoff nach oxidativem Aufschluß mit Peroxodisulfat PI DIN ISO 15705 (H 45) 2003-01 Wasserbesch” “ISO 11905-1 (H 36) 1998-08 Bestimmung von Stickstoff nach oxidativem Aufschluss mit Peroxodisulfat DIN 38409-H 41 1980-12 Bestimmung des chemischen Sauerstoffbedarfs (CSB) im Bereich über 15 mg/l DIN” “ISO 11905-1: 1998-08 (H 36) Adsorbierbare organische Halogene (AOX) DIN EN ISO 9562: 2005-02 (H 14) L L L DIN 38409-H 22: 2001-02 Teilbereich 6: Gaschromatografische Verfahren Parameter Verfahren Abw” “ISO 11905 -1: 1998 -08 (H 36)”
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ISO/IEC 17025 is the international standard for the competence of testing and calibration laboratories. Accreditation to this standard provides independent confirmation that a laboratory operates a quality management system and is technically competent to produce valid results within its declared scope.