19/30349187 DC - BS ISO 21741. Stationary source emissions. Sampling and determination of mercury compounds in flue gas using gold amalgamation trap

19/30349187 DC

BS ISO 21741. Stationary source emissions. Sampling and determination of mercury compounds in flue gas using gold amalgamation trap

Status : Current, Draft for public comment   Published : April 2019

Format
PDF

Format
HARDCOPY



This International Standard describes a method for the sampling of mercury of both vapour and solid phases on stationary source flue gas streams. Mercury generally exists in elemental (Hg0) and oxidized (Hg2+) forms, both in the vapour and solid phases in flue gases. The vapour-phase (gaseous) mercury is captured either isokinetically or non-isokinetically with a gold amalgamation trap after removing solid-phase (particulate) mercury with a filter. The oxidized mercury (Hg2+) in the vapour phase are converted to elemental mercury (Hg0) prior to the gold amalgamation trap. The concentration of gaseous mercury is determined using atomic absorption spectrometry (AAS) or atomic fluorescence spectrometry (AFS) after releasing mercury by heating the gold amalgamation trap. Separately, particulate mercury is collected isokinetically on a filter and the concentration is determined using cold vapour AAS or cold vapour AFS after dissolving the particulate mercury into solution.

The total concentration of mercury in flue gas is expressed as the sum of both gaseous and particulate mercury concentrations.

The gold amalgamation method is intended for short-term (periodic) measurements of gaseous mercury ranging from 0,01 μg/m3 to 100 μg/m3 with sampling volumes from 0,005 m3 to 0,1 m3 and sample gas flow rate between 0,2 l/min to 1 l/min. The measurement range of particulate mercury is typically from 0,01 μg/m3 to 100 μg/m3 with sampling volume from 0,05 m3 to 1 m3.




Standard Number19/30349187 DC
TitleBS ISO 21741. Stationary source emissions. Sampling and determination of mercury compounds in flue gas using gold amalgamation trap
StatusCurrent, Draft for public comment
Publication Date26 April 2019
Normative References(Required to achieve compliance to this standard)ISO 17852, ISO 20988, ISO 12141, ISO 16911-1, ISO 3696, ISO 9096, ISO 23210, ISO 12846, ISO 10396
Informative References(Provided for Information)No other standards are informatively referenced
International RelationshipsISO/DIS 21741
Draft Expiry Date12 June 2019
DescriptorsGold, Flue gases, Mercury, Stationary, Emission
ICS13.040.40
Title in FrenchÉmissions de sources fixes — Échantillonnage et détermination de la teneur en mercure dans les gaz de combustion en utilisant un piège d’amalgamation de l’or
CommitteeEH/2/1
PublisherBSI
FormatA4
DeliveryYes
Pages35
File Size855 KB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents


Worldwide Standards
We can source any standard from anywhere in the world


Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version


BSOL

The faster, easier way to work with standards