BS ISO BRITISH STANDARD 20552:2007 Workplace air - Determination of mercury vapour - Method using gold-amalgam collection and analysis by atomic absorption Spectrometry or atomic fluorescence spectrometry ICS 13.040.30 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSIS020552:2007 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 20552:2007. The UK participation in its preparation was entrusted by Technical Committee EH/2, Air quality,to Subcommittee EH/2/2, Work place atmospheres. Alist of organizations represented on EH/2/2 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliancewith a British Standard cannot confer immunityfrom legal obligations. This British Standard was Amendmentsissuedsincepublication published undertheauthority of the Standards Policy and Amd. No. Date Comments Strategy Committee on 30 March2007 BSI 2007 ISBN 9780580503337 BSISO20552:2007 INTERNATIONAL ISO STANDARD 20552 First edition 2007-02-15 Workplace air Determination of mercury vapour Method using gold- amalgam collection and analysis by atomic absorption spectrometry or atomic fluorescence spectrometry Airdes lieux de travailDetermination de la vapeur de mercure- MethodecombinantunprelevementparamalgamationaI'oretune detection par spectrometrie d'absorption atomique ou par spectrometrie de fluorescence atomique Reference number ISO 20552:2007(E) ISO ii BS ISO 20552:2007 Contents Page 1 Scope 2 Normative references 2 3 Terms and definitions 2 4 Principle. 5 Reactions. 4 6 Requirement ... 5 7 Reagents 5 8 Apparatus 5 8.1 Samplingequipment 5 8.2 Analytical instrumentation 9 Occupational exposureassessment 9.1 General 9.2 Static (area) sampling. 9.3 Personal sampling ... 9.4 Selectionofmeasurementconditionsandmeasurementpattern 10 Sampling .... 9 10.1 Preliminaryconsiderations 9 10.2 Preparation for sampling ... 10 10.3Samplingposition 11 10.4 Collection ofsamples 11 10.5 Transportationofsamples 12 11 Analysis ..... 12 12 Expressionofresults 13 12.1 Calculation of the air samplevolumes 13 12.2 Calculationofairbornemercuryconcentrations 13 Method performance 13 13 13.1Detectionandquantification limits... 13 13.2 Upper limits of the analytical range .... 14 13.3 14 Blankvalues... 13.4 Bias and precision 14 Effectsonsamplerperformance 13.5 14 13.6 Collection efficiency,breakthrough volume and sampling capacity of sorbent tubes.. 14 13.7Storagestability 15 13.8Interferences. 15 14Testreport 15 AnnexA(informative)Temperatureandpressure correction .... 17 Annex B (informative) Figures 19 Bibliography 23 ili BSISO20552:2007 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies non-governmental, in liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approvalbyat least 75 %of the member bodies castinga vote Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO20552waspreparedbyTechnicalCommitteeISO/TC146,Airquality,SubcommitteeSC2,Workplace atmospheres. iv BSIS020552:2007 Introduction mercury compounds. Industrial hygienists and other public health professionals need to determine the workplaceairmeasurements.ThisInternationalStandardhasbeenpublishedinordertomakeavailablea method for making measurements of mercury vapour in the workplace environment, i.e. b