ETHANOL PRIMARY GAS STANDARDS PREPARATION

Gonçalo Baptista, Florbela A. Dias, Eduarda Filipe

Abstract

In this paper it will be discussed the gravimetric method to produce ethanol primary gas standards according to the international standard ISO6142.<br />The ethanol gas standards are prepared by vaporizing ethanol in nitrogen and compressing them in a pressurized cylinder. During the preparation process careful control of weighing and all parameters that can influence it, such as air temperature, pressure and humidity, shall be made.<br />The standards composition are further analysed by the analytical method non dispersive infrared spectroscopy (NDIR). The traceability is assured comparing the composition with national standards of mass, pressure, temperature and other national/international amount of substance standards.

Keywords

ethanol, gas, standards

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IMEKO-WC-2009-TC24-435.pdf

DOI

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IMEKO TC

TC24 - Chemical Measurements

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