ISO 16740:2005 pdf download.Workplace air - Determination of hex avalent chromium in airborne particulate matter - Method by ion chromatography and spectrophotometric measurement using diphenyl carbazide.
8 Apparatus
8.1 Sampling equipment
8.1.1 Samplers, designed to collect the inhalable fraction of airborne particles, complying with EN 13205.
The operating instructions supplied by the manufacturer of any sampling cassette should be consulted to find out whether particulate matter deposited on the internal surfaces of the sampler forms part of the sample.
NOTE 1 In general, personal sampaers for collection of the inhalable fraction of awtome particles do not exhibit the same size-selective itharacteristica if used for static sampling.
NOTE 2 Some inhatable samplers are designed to collect the inhalable fraction of airborne partides on the titer, so that any particulate matter deposited on the internal surfaces of the sampler is not of interest. Other nhalable samplers are designed such that airborne partides wtiidi pess through the entry orifice(s) match the inhalable convention, m which case particulate matter deposited on the internal surfaces of the sampler does form part of the sançle. (Samplers of thE second type generally incorporate an internal filter cassette or cartridge that can be removed from the sampler to enable this material to be easily recovered.)
8.1.2 Filters, of a diameter suitable for use with the samplers (8,1.1), with a collection efficiency of not less than 99,5 % for particles with a 0,3 pm diffusion diameter (see ISO 7708:1995, 2.2), manufactured from a material that does not react with hexavalent chromium and that Is compatible with the sample preparation and analysis method.
8.1 Sampling equipment
8.1.1 Samplers, designed to collect the inhalable fraction of airborne particles, complying with EN 13205.
The operating instructions supplied by the manufacturer of any sampling cassette should be consulted to find out whether particulate matter deposited on the internal surfaces of the sampler forms part of the sample.
NOTE 1 In general, personal sampaers for collection of the inhalable fraction of awtome particles do not exhibit the same size-selective itharacteristica if used for static sampling.
NOTE 2 Some inhatable samplers are designed to collect the inhalable fraction of airborne partides on the titer, so that any particulate matter deposited on the internal surfaces of the sampler is not of interest. Other nhalable samplers are designed such that airborne partides wtiidi pess through the entry orifice(s) match the inhalable convention, m which case particulate matter deposited on the internal surfaces of the sampler does form part of the sançle. (Samplers of thE second type generally incorporate an internal filter cassette or cartridge that can be removed from the sampler to enable this material to be easily recovered.)
8.1.2 Filters, of a diameter suitable for use with the samplers (8,1.1), with a collection efficiency of not less than 99,5 % for particles with a 0,3 pm diffusion diameter (see ISO 7708:1995, 2.2), manufactured from a material that does not react with hexavalent chromium and that Is compatible with the sample preparation and analysis method.
