ASTM D7059-21
(Test Method)Standard Test Method for Determination of Methanol in Crude Oils by Multidimensional Gas Chromatography
Standard Test Method for Determination of Methanol in Crude Oils by Multidimensional Gas Chromatography
SIGNIFICANCE AND USE
5.1 Methanol is used in production of crude oil to prevent formation of gas hydrates. The presence of residual methanol in crude oils can lead to costly problems in refinery operations.
SCOPE
1.1 This test method covers the determination of methanol in crude oils by direct injection multidimensional gas chromatography in the concentration range of 15 ppm (m/m) to 900 ppm (m/m). The pooled limit of quantification (PLOQ) is 15 ppm (m/m).
1.2 This test method is applicable only to crude oils containing less than or equal to 0.1 % (v/v) water.
1.3 This test method has not been tested with crude oil samples that are solid or waxy, or both, at ambient temperatures.
1.4 The values stated in SI units are to be regarded as standard. Alternate units, in common usage, are also provided to increase clarity and aid the users of this 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 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.
1.6 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.
General Information
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Standards Content (Sample)
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.
Designation:D7059 −21
Standard Test Method for
Determination of Methanol in Crude Oils by
1
Multidimensional Gas Chromatography
This standard is issued under the fixed designation D7059; 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* D4175 Terminology Relating to Petroleum Products, Liquid
Fuels, and Lubricants
1.1 This test method covers the determination of methanol
D4307 Practice for Preparation of Liquid Blends for Use as
in crude oils by direct injection multidimensional gas chroma-
Analytical Standards
tography in the concentration range of 15 ppm (m/m) to
D4928 Test Method for Water in Crude Oils by Coulometric
900 ppm (m/m). The pooled limit of quantification (PLOQ) is
Karl Fischer Titration
15 ppm (m/m).
D6596 Practice for Ampulization and Storage of Gasoline
1.2 This test method is applicable only to crude oils con-
and Related Hydrocarbon Materials
taining less than or equal to 0.1 % (v/v) water.
E355 Practice for Gas ChromatographyTerms and Relation-
ships
1.3 This test method has not been tested with crude oil
samples that are solid or waxy, or both, at ambient tempera- E594 Practice for Testing Flame Ionization Detectors Used
in Gas or Supercritical Fluid Chromatography
tures.
1.4 The values stated in SI units are to be regarded as
3. Terminology
standard. Alternate units, in common usage, are also provided
3.1 Definitions:
to increase clarity and aid the users of this test method.
3.1.1 This test method makes reference to common gas
1.5 This standard does not purport to address all of the
chromatographicprocedures,terms,andrelationships.Detailed
safety concerns, if any, associated with its use. It is the
definitions of these can be found in Practices E355 and E594,
responsibility of the user of this standard to establish appro-
and Terminology D4175. Additional definitions and informa-
priate safety, health, and environmental practices and deter-
tion pertinent to this test method are listed below.
mine the applicability of regulatory limitations prior to use.
3.1.2 analytical column, n—porous layer open tubular
1.6 This international standard was developed in accor-
(PLOT) column with a stationary phase selective for oxygen-
dance with internationally recognized principles on standard-
ates; it is used to resolve methanol from 1-propanol to provide
ization established in the Decision on Principles for the
accurate quantitative results.
Development of International Standards, Guides and Recom-
3.1.3 cool-on-column injector, n—an injection port that
mendations issued by the World Trade Organization Technical
allowscontrolledinjectionofthesampleatatemperatureclose
Barriers to Trade (TBT) Committee.
to or lower than the boiling point of the solvent into the gas
chromatographic column or a liner within the injection port
2. Referenced Documents
connected to the column.
2
2.1 ASTM Standards:
3.1.3.1 Discussion—After the injection, the injection port is
D4006 Test Method for Water in Crude Oil by Distillation
heated at a fixed rate to a temperature sufficiently high enough
D4057 Practice for Manual Sampling of Petroleum and
to allow the transfer of sample components of interest from the
Petroleum Products
injection port to the part of the column located in the gas
chromatograph (GC) oven.
3.1.4 electronic pressure control, n—electronic pneumatic
1
This test method is under the jurisdiction of ASTM Committee D02 on
control of carrier gas flows; it can be flow or pressure
Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of
Subcommittee D02.04.0L on Gas Chromatography Methods. programmed to speed up elution of components.
Current edition approved Dec. 1, 2021. Published December 2021. Originally
3.1.5 low-volume connector, n—a special union for connect-
approved in 2004. Last previous edition approved in 2017 as D7059 – 09 (2017).
ing two lengths of tubing 1.6 mm inside diameter and smaller;
DOI: 10.1520/D7059-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
sometimes referred to as a zero dead-volume union.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.1.6 pre-column, n—a polydimethylsiloxane WCOT col-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. umn used to isolate the methanol and 1-propanol and several
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM Inter
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7059 − 09 (Reapproved 2017) D7059 − 21
Standard Test Method for
Determination of Methanol in Crude Oils by
1
Multidimensional Gas Chromatography
This standard is issued under the fixed designation D7059; 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 Scope*
1.1 This test method covers the determination of methanol in crude oils by direct injection multidimensional gas chromatography
in the concentration range of 15 ppm (m/m) to 900 ppm (m/m). The pooled limit of quantification (PLOQ) is 15 ppm (m/m).
1.2 This test method is applicable only to crude oils containing less than or equal to 0.1 % (v/v) water.
1.3 This test method has not been tested with crude oil samples that are solid or waxy, or both, at ambient temperatures.
1.4 The values stated in SI units are to be regarded as standard. Alternate units, in common usage, are also provided to increase
clarity and aid the users of this 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 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.
1.6 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D4006 Test Method for Water in Crude Oil by Distillation
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D4307 Practice for Preparation of Liquid Blends for Use as Analytical Standards
D4928 Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration
D6596 Practice for Ampulization and Storage of Gasoline and Related Hydrocarbon Materials
E355 Practice for Gas Chromatography Terms and Relationships
E594 Practice for Testing Flame Ionization Detectors Used in Gas or Supercritical Fluid Chromatography
3. Terminology
3.1 Definitions:
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of Subcommittee
D02.04.0L on Gas Chromatography Methods.
Current edition approved Oct. 1, 2017Dec. 1, 2021. Published November 2017December 2021. Originally approved in 2004. Last previous edition approved in 20132017
as D7059 – 09 (2013).(2017). DOI: 10.1520/D7059-09R17.10.1520/D7059-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
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D7059 − 21
3.1.1 This test method makes reference to common gas chromatographic procedures, terms, and relationships. Detailed definitions
of these can be found in Practices E355 and E594, and Terminology D4175. Additional definitions and information pertinent to
this test method are listed below.
3.1.2 analytical column, n—porous layer open tubular (PLOT) column with a stationary phase selective for oxygenates.
Itoxygenates; it is used to resolve methanol from 1-propanol to provide accurate quantitative results.
3.1.3 cool-on-column injector, n—an injection port that allows controlled injection of the sample at a temperature close to or lower
than the boiling point of the solvent into the gas chromatographic column or a liner within the injection port connected to the
column.
3.1.3.1 Discussion—
After the injection, the injection port is heated at a fixed rate to a temperature sufficiently high enough to allow the transfer of
sample components of interest from the injection port to the part of the column located in the gas chromatograph (GC) oven.
3.1.4 electronic pressure control, n—electronic pneumati
...
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