Name: EN ISO 6978-1:2005
Brand: CEN

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

Published date

05-11-2005

Publisher

Comite Europeen de Normalisation

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Reagents
7 Sampling
   7.1 General
   7.2 Sampling procedure
   7.3 Sample treatment
8 Mercury determination
   8.1 Transfer of mercury to AAS or AFS instrument
   8.2 Calibration
   8.3 Blank test
9 Calculation
10 Precision
   10.1 General
   10.2 Repeatability and reproducibility
   10.3 Uncertainty
11 Test report
Bibliography

ISO 6978-1:2003 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 microgram/m3 to 5 000 micrograms/m3 in natural gas. This method is applicable to sampled gas volumes containing less than 20 mg hydrogen sulfide 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.

Committee	CEN/TC 238
DocumentType	Standard
PublisherName	Comite Europeen de Normalisation
Status	Current

Standards	Relationship
DIN EN ISO 6978-1 E : 2005	Identical
NS EN ISO 6978-1 : 1ED 2005	Identical
NEN EN ISO 6978-1 : 2005	Identical
I.S. EN ISO 6978-1:2005	Identical
SN EN ISO 6978-1 : 2005	Identical
NF EN ISO 6978-1 : 2005	Identical
UNI EN ISO 6978-1 : 2007	Identical
PN EN ISO 6978-1 : 2007	Identical
ISO 6978-1:2003	Identical
NBN EN ISO 6978-1 : 2005	Identical
BS EN ISO 6978-1:2005	Identical
SS-EN ISO 6978-1:2005	Identical
UNE-EN ISO 6978-1:2006	Identical
DIN EN ISO 6978-1:2005-09	Identical

ISO 10715:1997	Natural gas — Sampling guidelines
ISO 6978-2:2003	Natural gas Determination of mercury Part 2: Sampling of mercury by amalgamation on gold/platinum alloy
ISO 14532:2014	Natural gas — Vocabulary
ISO 14111:1997	Natural gas — Guidelines to traceability in analysis
ISO 6570:2001	Natural gas — Determination of potential hydrocarbon liquid content — Gravimetric methods