EN ISO 9439:2000 PDF

Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - Carbon dioxide evolution test (ISO 9439:1999)

Название (английский):

EN ISO 9439:2000

Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - Carbon dioxide evolution test (ISO 9439:1999)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 19
Дата публикации:: 19 апреля 2000 г.
Издание:: CEN EN 9439 edition 2 version 1
ICS:: 13.060.70

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Описание (английский):

Migrated from Progress Sheet (TC Comment) (2000-07-10): TC N 315 (work programme 980901): UAP on ISO 9439 (to be published) TA/980916

Технические детали

Технический комитет: CEN/TC 230 - Water analysis
SKU: EN ISO 9439:2000

Abstract

Overview

EN ISO 9439:2000 (ISO 9439:1999) specifies the carbon dioxide evolution test for evaluating the ultimate aerobic biodegradability of organic compounds in aqueous media. The method measures microbially produced CO2 from a test substance (expressed versus the theoretical CO2, ThCO2) to determine the degree of mineralization to CO2, water and inorganic salts under aerobic conditions. The test is designed for water-soluble, poorly water‑soluble (with special dispersion measures), and non‑volatile substances that are not inhibitory to the test microorganisms.

Key topics and technical requirements

Test principle: static aqueous incubation with an inorganic test medium, a defined nominal carbon concentration (typically 10–40 mg C/L), and a mixed inoculum (activated sludge or environmental sources). CO2 evolved is trapped and quantified; results are reported as % of ThCO2.
Temperature & environment: incubation in the dark or diffuse light at 20–25 °C (±2 °C); agitation and aeration with CO2‑free air (example flowrates given for typical volumes).
Test media & reagents: composition of buffer and mineral solutions for 1 L medium is defined; use water with

Overview

Key topics and technical requirements

Test principle: static aqueous incubation with an inorganic test medium, a defined nominal carbon concentration (typically 10–40 mg C/L), and a mixed inoculum (activated sludge or environmental sources). CO2 evolved is trapped and quantified; results are reported as % of ThCO2.
Temperature & environment: incubation in the dark or diffuse light at 20–25 °C (±2 °C); agitation and aeration with CO2‑free air (example flowrates given for typical volumes).
Test media & reagents: composition of buffer and mineral solutions for 1 L medium is defined; use water with

EN ISO 9439:2000 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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