ASTM D6069 Test Method for Trace Nitrogen in Aromatic Hydrocarbons
ASTM D6069 Standard Test Method for Trace Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced Pressure Chemiluminescence Detection
1. Scope
1.1 This test method covers the determination of total nitrogen (organic and inorganic) in aromatic hydrocarbons, their derivatives and related chemicals.
1.2 This test method is applicable for samples containing nitrogen from 0.2 to 2 mgN/kg. For higher nitrogen concentrations refer to Test Method D4629.
1.2.1 The detector response of this technique within the specified scope of this test method is linear with nitrogen concentration.
1.3 The following applies to all specified limits in this test method: for purposes of determining conformance with this test method, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E 29.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. For specific hazard statements, see Section 9.
2. Referenced Documents
2.1 ASTM Standards:
D1555 Test Method for Calculation of Volume and Weight of Industrial Aromatic Hydrocarbons
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D4629 Test Method for Organically Bound Trace Nitrogen in Liquid Petroleum Hydrocarbons By Syringe/Inlet Oxidative Combustion and Chemiluminescence Detection
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
2.2 Other Documents:
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and 1910.1200
3. Terminology
3.1 Definitions:
3.1.1 reduced pressure chemiluminescence - a chemical reaction at pressure less than 760 mm mercury (Hg) in which light is emitted.
3.1.2 oxidative pyrolysis - a process in which a sample under goes combustion in an oxygen rich environment at temperatures greater than of 650°C.
3.1.2.1 Discussion - Organic compounds pyrolytically decompose to carbon dioxide, water and elemental oxides.
