Hydrogen to carbon d is useful to assess the performance of upgrading processes. Land Use and Development. No other units of measurement are included in this standard. Enter your account email address to request a password reset: Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.
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Document Center Inc. Values obtained represent the total carbon, the total hydrogen, and the total nitrogen. No other units of measurement are included in this standard. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Significance and Use This is the first ASTM standard covering the simultaneous determination of carbon, hydrogen, and nitrogen in petroleum products and lubricants. Carbon, hydrogen, and particularly nitrogen analyses are useful in determining the complex nature of sample types covered by this test method. The CHN results can be used to estimate the processing and refining potentials and yields in the petrochemical industry.
The concentration of nitrogen is a measure of the presence of nitrogen containing additives. Knowledge of its concentration can be used to predict performance.
Some petroleum products also contain naturally occurring nitrogen. Knowledge of hydrogen content in samples is helpful in addressing their performance characteristics. Hydrogen to carbon ratio is useful to assess the performance of upgrading processes.
ASTM D5291 PDF
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CHN ASTM Testing