![]() ![]() ![]() Uncertainties associated with the component mole fractions shall be calculated in accordance with ISOIIEC Guide 98-3.įor Type 1 analyses in accordance with ISO 6974-1, the uncertainty calculation includes random and systematic uncertainties from three main sources: uncertainty of the certified reference mixtures, uncertainty of analysis and uncertainty of the data fitting procedure.įor Type 2 analyses in accordance with ISO 6974-1, the uncertainty calculation includes both random elements and systematic errors introduced by the assumption of a linear response through the origin, the systematic errors being calculated from the results of the initial performance evaluation. ISO 6974-2:2012 pdf download-Natural gas一Determination of composition and associated uncertainty by gas chromatography一 Part 2: Uncertainty calculations. ![]()
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