SS-EN-ISO-6978-1 Natural gas - Determination of mercury - Part 1: Sampling of mercury by chemisorption on iodine (ISO 6978-1:2003)


Document Center Inc. is an authorized dealer of SIS standards.
The following bibliographic material is provided to assist you with your purchasing decision:

This part of ISO 6978 specifies a method for the determination of total mercury content in natural gas using a sampling method at pressures up to 40 MPa by chemisorption on iodine-impregnated silica gel. This sampling method is suitable for the determination of mercury contents within the range of 0,1 µg/m3 to 5 000 µg/m3 in natural gas. This method is applicable to sampled gas volumes containing less than 20 mg hydrogen sulfide (absolute content) and less than a total liquid hydrocarbon condensate of 10 g/m3 under the sampling conditions. The collected mercury is determined by measuring the absorbance or fluorescence of mercury vapour at 253,7 nm. NOTE ISO 6978-2 gives a sampling method suitable for the determination of mercury content of pipeline natural gas by amalgamation of mercury on gold/platinum alloy thread at atmospheric pressure for the range of mercury from 0,01 µg/m3 to 100 µg/m3 and for sampling at high pressure (up to 8 MPa) from 0,001 µg/m3 to 1 µg/m3.

To find similar documents by classification:

75.060 (Natural gas)

This document comes with our free Notification Service, good for the life of the document.

This document is available in either Paper or PDF format.




Designation Name

SS-EN ISO 6978-1:2005

Revision Level




Publication Date

May 20, 2005



Page Count


International Equivalent

EN ISO 6978-1:2005(IDT); ISO 6978-1:2003(IDT)