ASTM D3760-08
(Test Method)Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography
Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography
SIGNIFICANCE AND USE
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 isopropylbenzene is produced or is used in a manufacturing process. It may also be used in development or research work involving isopropylbenzene.
This test method is useful in determining the purity of isopropylbenzene with normal impurities present including diisopropylbenzenes. If extremely high boiling or unusual impurities are present in the isopropylbenzene, this test method would not necessarily detect them and the purity calculation would be erroneous.
Cumene hydroperoxide, if present, will yield decomposition products that will elute in the chromatogram thereby giving incorrect results.
The nonaromatic hydrocarbons commonly present from the isopropylbenzene manufacturing process will interfere with the determination of benzene when Column A in Table 1 is used.
The internal standard must be sufficiently resolved from any impurity and the isopropylbenzene peak.
SCOPE
1.1 This test method covers the determination of the purity of isopropylbenzene (cumene) by gas chromatography.
1.2 This test method has been found applicable to the measurement of impurities such as nonaromatic hydrocarbons, benzene, ethylbenzene, t-butylbenzene, n-propylbenzene, alpha-methylstyrene, sec-butylbenzene, and diisopropylbenzene, which are common to the manufacturing process of isopropylbenzene. Limit of detection for these impurities is 10 mg/kg (see 5.1).
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 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 7.
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Designation: D3760 − 08
StandardTest Method for
Analysis of Isopropylbenzene (Cumene) by Gas
1
Chromatography
This standard is issued under the fixed designation D3760; 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* E355 Practice for Gas ChromatographyTerms and Relation-
ships
1.1 This test method covers the determination of the purity
E691 Practice for Conducting an Interlaboratory Study to
of isopropylbenzene (cumene) by gas chromatography.
Determine the Precision of a Test Method
1.2 This test method has been found applicable to the
E1510 Practice for Installing Fused Silica Open Tubular
measurement of impurities such as nonaromatic hydrocarbons,
Capillary Columns in Gas Chromatographs
benzene, ethylbenzene, t-butylbenzene, n-propylbenzene,
2.2 Other Document:
alpha-methylstyrene, sec-butylbenzene, and
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
diisopropylbenzene, which are common to the manufacturing
3
1910.1200
process of isopropylbenzene. Limit of detection for these
impurities is 10 mg/kg (see 5.1).
3. Summary of Test Method
1.3 In determining the conformance of the test results using
3.1 A known amount of internal standard is added to a
this method to applicable specifications, results shall be
sample of isopropylbenzene. The prepared sample is mixed
rounded off in accordance with the rounding-off method of
and analyzed by a gas chromatograph equipped with a flame
Practice E29.
ionization detector (FID). The peak area of each impurity and
1.4 This standard does not purport to address all of the
the internal standard is measured and the amount of each
safety concerns, if any, associated with its use. It is the
impurity is calculated from the ratio of the peak area of the
responsibility of the user of this standard to establish appro-
internalstandardversusthepeakareaoftheimpurity.Purityby
priate safety and health practices and determine the applica-
GC (the isopropylbenzene content) is calculated by subtracting
bility of regulatory limitations prior to use. For specific hazard
the sum of the impurities found from 100.00. Results are
statements, see Section 7.
reported in weight percent.
2. Referenced Documents
4. Significance and Use
2
2.1 ASTM Standards:
4.1 This test method is suitable for setting specifications on
D3437 Practice for Sampling and Handling Liquid Cyclic
thematerialsreferencedin1.2andforuseasaninternalquality
Products
control tool where isopropylbenzene is produced or is used in
D6809 Guide for Quality Control and Quality Assurance
a manufacturing process. It may also be used in development
Procedures for Aromatic Hydrocarbons and Related Ma-
or research work involving isopropylbenzene.
terials
4.2 This test method is useful in determining the purity of
E29 Practice for Using Significant Digits in Test Data to
isopropylbenzene with normal impurities present including
Determine Conformance with Specifications
diisopropylbenzenes. If extremely high boiling or unusual
E260 Practice for Packed Column Gas Chromatography
impuritiesarepresentintheisopropylbenzene,thistestmethod
would not necessarily detect them and the purity calculation
1
This test method is under the jurisdiction of ASTM Committee D16 on would be erroneous.
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
4.3 Cumene hydroperoxide, if present, will yield decompo-
Subcommittee D16.07 on Styrene, Ethylbenzene and C9 and C10 Aromatic
Hydrocarbons. sition products that will elute in the chromatogram thereby
Current edition approved Jan. 1, 2008. Published January 2008. Originally
giving incorrect results.
´1
approved in 1979. Last previous edition approved in 2002 as D3760 – 02 . DOI:
10.1520/D3760-08.
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 ----------------------
D3760 − 08
TABLE 1 Typical Instrumental Parameters
6.1.1 Internal Standard—Normal Butylbenzene (nBB) is
Column A Column B the recommended internal standard of choice. Other com-
Detector Flame Ionization Flame Ionization pounds may be found ac
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
e1
Designation:D3760–02 Designation:D3760–08
Standard Test Method for
Analysis of Isopropylbenzene (Cumene) by Gas
1
Chromatography
This standard is issued under the fixed designation D 3760; 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 (e) indicates an editorial change since the last revision or reapproval.
1
e NOTE—Research report was added editorially in September 2004.
1. Scope*
1.1 This test method covers the determination of the purity of isopropylbenzene (cumene) by gas chromatography.
1.2 This test method has been found applicable to the measurement of impurities such as nonaromatic hydrocarbons, benzene,
ethylbenzene, t-butylbenzene, n-propylbenzene, alpha-methylstyrene, sec-butylbenzene, and diisopropylbenzene, which are
common to the manufacturing process of isopropylbenzene. Limit of detection for these impurities is 10 mg/kg (see 5.1).
1.3The following applies to all specified limits in this standard: for purposes of determining conformance with this standard, 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 E29
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 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 7.
2. Referenced Documents
2
2.1 ASTM Standards:
D 3437 Practice for Sampling and Handling Liquid Cyclic Products
D 6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E 260 Practice for Packed Column Gas Chromatography
E 355Practice for Gas Chromatography Terms and Relationships Practice for Gas Chromatography Terms and Relationships
E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E 1510 Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs
2.2 Other Document:
3
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and 1910.1200
3. Summary of Test Method
3.1 Aknown amount of internal standard is added to a sample of isopropylbenzene.The prepared sample is mixed and analyzed
by a gas chromatograph equipped with a flame ionization detector (FID). The peak area of each impurity and the internal standard
is measured and the amount of each impurity is calculated from the ratio of the peak area of the internal standard versus the peak
areaoftheimpurity.PuritybyGC(theisopropylbenzenecontent)iscalculatedbysubtractingthesumoftheimpuritiesfoundfrom
100.00. Results are reported in weight percent.
1
This test method is under the jurisdiction ofASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility of Subcommittee
D16.07 on Styrene, Ethylbenzene, and C and C Aromatic Hydrocarbons.
9 10
Current edition approved Jan. 10, 2002. Published March 2002. Originally published as D3760–79. Last previous edition D3760–98.
1
This test method is under the jurisdiction ofASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility of Subcommittee
D16.07 on Styrene, Ethylbenzene and C9 and C10 Atomatic Hydrocarbons .
e1
Current edition approved Jan. 1, 2008. Published January 2008. Originally approved in 1979. Last previous edition approved in 2002 as D 3760 – 02 .
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
3
Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
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
...
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