ISO 17091 pdf download

ISO 17091 pdf download Workplace air — Determination of lithium hydroxide, sodium hydroxide, potassium hydroxide and calcium dihydroxide — Method by measurement of corresponding cations by suppressed ion chromatography
Scope
This International Standard specifies a method for the determination ofthe time-weighted average massconcentration oflithium hydroxide (LiOH), sodium hydroxide (Na0H), potassium hydroxide (KOH),andcalcium dihydroxide (Ca(OH)2] in workplace air by collection of the particulate hydroxides on a filterand analysis of the corresponding cations using ion chromatography.
For aerosol sampling, the method is applicable to the personal sampling of the inhalable fraction ofairborne particles, as defined in ISO 7708, and to static (area) sampling.
The method is applicable to the determination of masses of 0,005 mg to at least 2,5 mg of lithium persample and 0,01 mg to at least 5 mg of sodium, potassium, and calcium per sample.
The concentration range of particulate LiOH, NaH,KOH, and Ca(OH)2 in air for which the measuringprocedure is applicable is determined bythe sampling method selected by the user. For a 1 m3 air sample,the working range is approximately 0,002 mg m-3 to at least 20 mg m-3 for all four hydroxides. For a30lair sample, the lower limit of the working range is approximately 0,1 mg m-3 for all four hydroxides.
The procedure does not allow differentiation between the hydroxides and their corresponding saltsif both are present in the air lf the cations are present alone in the form of hydroxides, the method isspecific for these basic compounds. In other circumstances, the results obtained represent the highestconcentration ofthe hydroxides that could be present in the sampled air. (See 12.6.
2 Normative references
The following documents,in whole or in part, are normatively referenced in this document and areindispensable for its application. For dated references, only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any amendments) applies.
ISO 1042 Laboratory glassware – One-mark volumetric flasks
SO 7708:1995,Air quality – Particle size fraction definitions for health-related sampling
ISO 8655-1, Piston-operated volumetric apparatus — Part 1: Terminology, general requirements and userrecommendations
ISO 8655-2, Piston-operated volumetric apparatus – Part 2: Piston pipettes
ISO 8655-6, Piston-operated volumetric apparatus – Part 6: Gravimetric methods for the determinationofmeasurement error
ISO 13137:–1), Workplace atmospheres — Pumps for personal sampling ofchemical and biological agents Requirements and test methods
EN 13205-1, Workplace atmospheres — Assessment of performance of instruments for measurement oairborne particle concentrations — Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 General definitions
3.1.1
breathing zone
space around the worker’s face from which breath is taken
[SOURCE: EN 1540:2011, 2.4.5, modified]
3.1.2
breathing zone