Physikalisch-Technische Bundesanstalt Braunschweig, Braunschweig, Germany.
J Breath Res. 2010 Sep;4(3):036004. doi: 10.1088/1752-7155/4/3/036004. Epub 2010 Aug 17.
Calibration gas mixtures for breath alcohol measuring techniques need to have a defined ethanol concentration in water-saturated air. For the calibration of evidential breath analysers in Germany, these gases are prepared at the Physikalisch-Technische Bundesanstalt according to the saturation method. The ethanol concentration is calculated via the air-liquid partition ratios of the air-water-ethanol substance system. This article deals with the selection and critical consideration of different preparation methods for test gases and their applicability to the specific gas mixture required for breath alcohol measurements.
用于呼气酒精测量技术的校准气体混合物需要在水饱和空气中具有定义的乙醇浓度。在德国，为了对证据呼气分析仪进行校准，这些气体是按照饱和法在联邦物理技术研究院进行制备的。乙醇浓度是通过空气-水-乙醇物质系统的气液分配比计算得出的。本文涉及对测试气体的不同制备方法的选择和关键考虑因素，以及它们对呼气酒精测量所需的特定气体混合物的适用性。
