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Cross References:
ISO 5667-16
ISO 6777
ISO 7150-1
ISO 11733
ISO 6107-1:2004
ISO 8192
ISO 9888:1999
 

Document History

  1. BS EN ISO 9509:2006

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    Water quality. Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms

    • Most Recent
  2. BS EN ISO 9509:1995


    Water quality. Method for assessing the inhibition of nitrification of activated sludge micro-organisms by chemicals and waste water

    • Historical Version