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ASTM D6142-12

(Test Method)

Standard Test Method for Analysis of Phenol by Capillary Gas Chromatography

Standard Test Method for Analysis of Phenol by Capillary Gas Chromatography

SIGNIFICANCE AND USE
5.1 This test method is suitable for setting specifications on phenol and for use as an internal quality control tool where phenol is produced or is used in a manufacturing process. It may also be used in development or research work involving phenol. It is generally applied to determining those commonly occurring impurities such as mesityl oxide, cumene, hydroxyacetone, acetone, alpha-methylstyrene, 2-methylbenzofuran, and acetophenone.  
5.2 Purity is commonly reported by subtracting the determined expected impurities from 100.00. However, a gas chromatographic analysis cannot determine absolute purity if water is present or unknown components are contained within the material being examined.
SCOPE
1.1 This test method covers the determination of known impurities in phenol by gas chromatography (GC). It is generally meant for the analysis of phenol of 99.9 % or greater purity.  
1.2 This test method has been found applicable over impurity concentrations of 15 to 70 mg/kg. Users of this method believe it is linear over a wider range.  
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. For specific hazard statements, see Section 9.

General Information

Status
Historical
Publication Date
31-May-2012
ICS
71.040.50 - Physicochemical methods of analysis
Technical Committee
D16 - Aromatic, Industrial, Specialty and Related Chemicals
Drafting Committee
D16.02 - Oxygenated Aromatics
Current Stage
Ref Project

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ASTM D6142-12 - Standard Test Method for Analysis of Phenol by Capillary Gas ChromatographyASTM D6142-12 - Standard Test Method for Analysis of Phenol by Capillary Gas Chromatography
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ASTM D6142-12 - Standard Test Method for Analysis of Phenol by Capillary Gas Chromatography
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D6142 − 12
StandardTest Method for
1
Analysis of Phenol by Capillary Gas Chromatography
This standard is issued under the fixed designation D6142; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This test method covers the determination of known
E355 Practice for Gas ChromatographyTerms and Relation-
impurities in phenol by gas chromatography (GC). It is
ships
generally meant for the analysis of phenol of 99.9 % or greater
E691 Practice for Conducting an Interlaboratory Study to
purity.
Determine the Precision of a Test Method
1.2 This test method has been found applicable over impu-
E1510 Practice for Installing Fused Silica Open Tubular
rity concentrations of 15 to 70 mg/kg. Users of this method
Capillary Columns in Gas Chromatographs
believe it is linear over a wider range.
2.2 Other Document:
1.3 In determining the conformance of the test results using
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
3
this method to applicable specifications, results shall be
1910.1200
rounded off in accordance with the rounding-off method of
Practice E29.
3. Terminology
1.4 The values stated in SI units are to be regarded as
3.1 See Terminology D4790 for definition of terms used in
standard. No other units of measurement are included in this
this test method.
standard.
4. Summary of Test Method
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 A known amount of an internal standard is added to a
responsibility of the user of this standard to establish appro-
sample of phenol. The prepared sample is mixed and analyzed
priate safety and health practices and determine the applica-
by a gas chromatograph equipped with a flame ionization
bility of regulatory limitations prior to use. For specific hazard
detector (FID).The peak area of each impurity and the internal
statements, see Section 9.
standard is measured. The amount of each impurity is calcu-
lated from the ratio of the peak area of the internal standard
2. Referenced Documents
versus the peak area of the impurity. Results are reported in
2
2.1 ASTM Standards:
milligrams per kilogram.
D3852 Practice for Sampling and Handling Phenol, Cresols,
and Cresylic Acid
5. Significance and Use
D4307 Practice for Preparation of Liquid Blends for Use as
5.1 This test method is suitable for setting specifications on
Analytical Standards
phenol and for use as an internal quality control tool where
D4790 Terminology ofAromatic Hydrocarbons and Related
phenol is produced or is used in a manufacturing process. It
Chemicals
may also be used in development or research work involving
D6809 Guide for Quality Control and Quality Assurance
phenol. It is generally applied to determining those commonly
Procedures for Aromatic Hydrocarbons and Related Ma-
occurring impurities such as mesityl oxide, cumene,
terials
hydroxyacetone, acetone, alpha-methylstyrene,
2-methylbenzofuran, and acetophenone.
1
This test method is under the jurisdiction of ASTM Committee D16 on
5.2 Purity is commonly reported by subtracting the deter-
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
mined expected impurities from 100.00. However, a gas
Subcommittee D16.02 on Oxygenated Aromatics.
Current edition approved June 1, 2012. Published June 2012. Originally chromatographic analysis cannot determine absolute purity if
approved in 1997. Last previous edition approved in 2008 as D6142 – 08. DOI:
10.1520/D6142-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Standards volume information, refer to the standard’s Document Summary page on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
the ASTM website. www.access.gpo.gov.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6142 − 12
TABLE 1 Recommended Operating Conditions
ppm, less than 0.5 ppm is preferred. Purify carrier, makeup,
Column: To use for identification of all components anddetectorgasestoremoveoxygen,water,andhydrocarbons.
Tubing fused silica
8.4 Compressed Air—Purify air to remove water and hydro-
Stationary phase polyethylene glycol-acid modified
S
...

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4.1 Knowledge of the UV transmittance of MEG is required to establish whether the product meets the requirements of its quality specifications.  
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1.1 This test method covers a procedure for the determination of the transmittance of monoethylene glycol (1,2-ethanediol; MEG) at wavelengths in the region 220 nm to 350 nm. The results provide a measure of the purity of the sample with respect to ultraviolet (UV) absorbing compounds.  
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5.1 This test method is suitable for setting specifications on the materials referenced in 1.2 and for use as an internal quality control tool where AMS is produced or is used in a manufacturing process. It may also be used in development or research work involving AMS.  
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5.1 This test method is suitable for setting specifications on phenol and for use as an internal quality control tool where phenol is produced or is used in a manufacturing process. It may also be used in development or research work involving phenol. It is generally applied to determining those commonly occurring impurities such as mesityl oxide, cumene, hydroxyacetone, acetone, α-methylstyrene, 2-methylbenzofuran, and acetophenone.  
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4.1 This test method is suitable for setting specifications and for use as an internal quality control tool where these products are produced or are used. Typical impurities are: 1,3-dioxolane-2-methanol, diethylene glycol, and triethylene glycol.  
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1.1 This test method specifies the apparatus and procedures for the electrometric measurement of pH values of aqueous solutions with the glass electrode. It does not deal with the manner in which the solutions are prepared. pH measurements of good precision can be made in aqueous solutions containing high concentrations of electrolytes or water-soluble organic compounds, or both. It should be understood, however, that pH measurements in such solutions are only a semiquantitative indication of hydrogen ion concentration or activity. The measured pH will yield an accurate result for these quantities only when the composition of the medium matches approximately that of the standard reference solutions. In general, this test method will not give an accurate measure of hydrogen ion activity unless the pH lies between 2 and 12 and the concentration of neither electrolytes nor nonelectrolytes exceeds 0.1 mol/L (M).  
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Standard Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and External Calibration

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5.1 Determining the type and amount of hydrocarbon impurities remaining from the manufacture of toluene, mixed xylenes, and p-xylenes used as chemical intermediates and solvents is often required. This test method is suitable for setting specifications and for use as an internal quality control tool where these products are produced or are used. Typical impurities are: alkanes containing 1 to 10 carbons atoms, benzene, toluene, ethylbenzene (EB), xylenes, and aromatic hydrocarbons containing nine carbon atoms.  
5.2 Purity is commonly reported by subtracting the determined expected impurities from 100.00. However, a gas chromatographic analysis cannot determine absolute purity if unknown or undetected components are contained within the material being examined.  
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1.1 This test method covers the determination of the total nonaromatic hydrocarbons and trace monocyclic aromatic hydrocarbons in toluene, mixed xylenes, and p-xylene by gas chromatography. The purity of toluene, mixed xylenes, or p-xylene can also be calculated. Calibration of the gas chromatographic system is done by the external standard calibration technique. A similar test method, using the internal standard calibration technique, is Test Method D2360.  
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1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statement, see Section 9.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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