ISO 6978:1992
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
View Superseded by
Natural gas Determination of mercury
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
27-02-2019
English, French
20-08-1992
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Two methods are specified: method A for higher mercury content (> 0,5 g/m^3) based on sampling at atmospheric pressure, absorption in potassium permangante solution, reduction of mercury ions, analysis by flameless atomic absorption spectrometry; method B for lower mercury content (10^- 3 g/m^3 to 1 g/m^3) based on sampling at atmospheric or higher pressure, adsorption on silver/gold, desorption, analysis by flameless atomic absorption spectrometry.
| DocumentType |
Standard
|
| Pages |
11
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy |
| Standards | Relationship |
| BS 7678:1993 | Identical |
| ASTM D 6350 : 2014 | Standard Test Method for Mercury Sampling and Analysis in Natural Gas by Atomic Fluorescence Spectroscopy (Withdrawn 2023) |
| ISO 4793:1980 | Laboratory sintered (fritted) filters — Porosity grading, classification and designation |
| ISO 3696:1987 | Water for analytical laboratory use — Specification and test methods |
| ISO 641:1975 | Laboratory glassware — Interchangeable spherical ground joints |
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