ISO 9835:1993
Ambient air — Determination of a black smoke index
Ambient air — Determination of a black smoke index
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 9
- Дата публикации:
- 10 марта 1993 г.
- Издание:
- ISO IS 9835 edition 1 version 1
- ICS:
- 13.040.20
Specifies a method for measuring the black smoke index of an ambient air sample based on the staining effect of particles which is produced when a sample of air is drawn through a filter paper. Annex A describes conversion of absorption coefficient to traditional black smoke units.
Abstract
Overview
ISO 9835:1993 specifies a standardized method to determine the black smoke index of ambient air by measuring the staining (light absorption) caused by particulate matter collected on filter paper. The method uses air sampling, reflectance measurement of the stained filter, and calculation of an , which can be converted to traditional black smoke units via Annex A. The procedure is intended for measurements in the black smoke index range of about 6 to 375 and is based on reflectometry rather than direct gravimetric mass.
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