JJF 4.3-2010 Guidance for the Uncertainty Assessment of Routine Chemical Composition in the Determination of Tobacco and Tobacco Products by Continuous Flow Method Part 3: Total Nitrogen (English Version)
National Metrological Technical Specifications of the People's Republic of China
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2011JJF 4.3-2010 Guidance for the Uncertainty Assessment of Routine Chemical Composition in the Determination of Tobacco and Tobacco Products by Continuous Flow Method Part 3: Total Nitrogen