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Standard Test Method for Ultra Low Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced Pressure Chemiluminescence Detection
Automaticky přeložený název:
Standardní zkušební metoda pro Ultra nízkým obsahem dusíku v aromatických uhlovodíků oxidační spalování a Snížené detekce tlaku Chemiluminescence
NORMA vydána dne 1.7.2013
Označení normy: ASTM D7184-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.7.2013
Kód zboží: NS-37795
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
chemiluminescence, nitrogen, reduced pressure, ICS Number Code 71.080.15 (Aromatic hydrocarbons)
Significance and Use | ||||||||||
5.1 This test method is useful to detect and quantify nitrogen-containing compounds at a concentration of 0.03 to 1 mg N/kg in light aromatic hydrocarbons used or produced in manufacturing process. These nitrogen-containing compounds are undesirable in finished aromatic products and may be used in setting specification for determining the total nitrogen content in aromatic hydrocarbons. 5.2 This test method requires the use of reduced pressure at the detector. Loss of vacuum or pressure fluctuations impact the sensitivity of the detector and the ability to determine nitrogen concentrations less than 1 mg N/kg. |
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1. Scope | ||||||||||
1.1 This test method covers the determination of total nitrogen in aromatic hydrocarbons, such as benzene, toluene, and xylene. 1.2 This test method is applicable for samples containing nitrogen from 0.38 to 1.2 mg N/kg. For higher nitrogen concentrations refer to Test Method D6069 or D4629. With careful analytical technique, this method can be used to successfully analyze concentrations below the current scope (see 1.3 In determining the conformance of the test results using this method to applicable specifications; results shall be rounded off in accordance with the rounding-off method of Practice E29. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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.
Standard Practice for Conducting an
Interlaboratory Study to Determine the Precision of a Test
Method Standard Practice for Using Significant
Digits in Test Data to Determine Conformance with
Specifications Standard Test Method for Trace Nitrogen
in Liquid Hydrocarbons by Syringe/Inlet Oxidative Combustion and
Chemiluminescence Detection Standard Practice for Sampling and
Handling Liquid Cyclic Products Standard Guide for Quality Control and
Quality Assurance Procedures for Aromatic Hydrocarbons and Related
Materials (Includes all amendments and changes 10/20/2020). |
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