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Air Liquide America Specialty Gases LLC

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Instrumental analysis in the lab after blending. A process based on statistics used to estimate the true concentration for each component of a gas mixture and to assign the analyzed concentration. A further objective of analysis is to determine the analysis accuracy for each component. Analytical measurements have sufficient work content to assure that component concentrations and accuracies meet customer and Scott specifications. Example: A Certificate of Accuracy stating Component X: 100 ppm +/2% (mol/mol)" means "Scott has analyzed this gas mixture and determined that the most probable value for Component X is 100 ppm and the true value is between 98 and 102 ppm, on a mole basis, at the 95% confidence level."

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