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STN EN ISO 5815-1

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Electronic version (pdc file)

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Name: STN EN ISO 5815-1
Validity: Withdrawn
Number of pages: 34
Language:
EN
Paper: 17,20€
Electronic version a) Only read (without ability to print and copy) 15,48€
b) Without ability to print, with ability to copy (printscreen) 17,20€
c) With ability to print and copy (printscreen) 22,36€
Slovak title Kvalita vody. Stanovenie biochemickej spotreby kyslíka po n dňoch (BODn). Časť 1: Zrieďovacia a očkovacia metóda s prídavkom alyltiomočoviny (ISO 5815-1: 2019)
English title Water quality - Determination of biochemical oxygen demand after n days (BODn) - Part 1: Dilution and seeding method with allylthiourea addition (ISO 5815-1:2019)
Release Date: 01. 01. 2020
Date of withdrawal: 01. 10. 2020
ICS: 13.060.50
Sorting character/National clasification code 75 7369
Level of incorporation: idt EN ISO 5815-1:2019, idt ISO 5815-1:2019
Official Journal 12/19
Amendments
Replaced by: STN EN ISO 5815-1:2020-10 (75 7369)
Repleces: STN EN 1899-1:2001-11 (75 7369)
Note in Official Journal: Rozpracované prekladom.
Subject of the standard: This document specifies the determination of the biochemical oxygen demand of waters by dilution and seeding with suppression of nitrification after 5 d or 7 d incubation time. It is applicable to all waters having biochemical oxygen demands usually between 1 mg/l and 6 000 mg/l. It applies particularly to waste waters but also suits for the analysis of natural waters. For biochemical oxygen demands greater than 6 000 mg/l of oxygen, the method is still applicable, but special care is needed taking into consideration the representativeness of subsampling for preparation of the dilution steps. The results obtained are the product of a combination of biochemical and chemical reactions in presence of living matter which behaves only with occasional reproducibility.
Preview: Náhľad normy (PDF)