ISO 4226:2007 pdf free.Air quality — General aspects — Units of measurement.
Introduction
The series of International Standards on air quality includes the standardization of methods for the measurement of gases, vapours and particles. In order to enable results to be compared either within or between countries, it is essential to use agreed units of measurement to report the results and other relevant information so that sound conclusions may be drawn. It is also desirable to keep the number of units of measurement to a minimum.
ISO 4226 lays down the units to be used when reporting results of air quality measurements. NOTE General guidance on the International System of Units is given in ISO 1000.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 31-0, Quantities and units — Part 0: General principles
Iso 1000, SI units and recommendations for the use of their multiples and of certain other units
3 Units
The units specified in Table 1 shall be used when reporting results of air quality measurements. The units of other quantities used in reporting shall be in accordance with ISO 1000 and with the general principles concerning units specified in ISO 31-0.ISO 4226 pdf download.