ISO 8672:1993 PDF
Air quality — Determination of the number concentration of airborne inorganic fibres by phase contrast optical microscopy — Membrane filter method
Air quality — Determination of the number concentration of airborne inorganic fibres by phase contrast optical microscopy — Membrane filter method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 25
- Дата публикации:
- 28 января 1993 г.
- Издание:
- ISO IS 8672 edition 1 version 1
- ICS:
- 13.040.30
The principle of the method specified is collecting a sample by drawing a measured quantity of air through a membrane filter by means of a battery-powered sampling pump, transforming the filter from an opaque membrane into a homogeneous optically transparent specimen, sizing and counting the fibres using a phase contrast microscope. The results are expressed as fibres per cubic centimetre of air, calculated from the number of fibres on the filter and the measured volume of air sampled. Limitations of the method are stated.
Технические детали
- Технический комитет
- ISO/TC 146/SC 2 - Workplace atmospheres
- SKU
- ISO 8672:1993