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生物燃料的国家标准规定了产品的技术指标和相应的检测方法。水的饱和辛醇溶液的水分标准物质,用于生物燃料水分测量时仪器的校准和方法的验证,能够保障测量结果的准确可靠和等效一致。该标准物质采用卡尔.费休库仑法、卡尔.费休容量法和定量核磁共振等三种不同原理的方法定值。通过方法研究和改进,实现了库仑法和容量法的一致;通过引入新的核磁共振方法,提高了结果的准确性。最终标准物质的水分量值为4.76%,扩展不确定度为0.09%。
National standards for biofuels set the technical specifications and the corresponding test methods. Water saturated octanol solution of moisture standards for biofuel moisture measurement instrument calibration and method validation, to ensure accurate and reliable measurement results consistent. The standard material using Karl Fischer coulomb method, Karl Fischer volume method and quantitative NMR methods of three different methods of valuation. Through the method research and improvement, the consistency between Coulomb method and volumetric method was realized; the accuracy of the result was improved by introducing a new NMR method. The final standard has a moisture content of 4.76% and an expanded uncertainty of 0.09%.