ASTM D3760-13
(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
4.1 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 isopropylbenzene is produced or is used in a manufacturing process. It may also be used in development or research work involving isopropylbenzene.
4.2 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.
4.3 Cumene hydroperoxide, if present, will yield decomposition products that will elute in the chromatogram thereby giving incorrect results.
4.4 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.
4.5 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). This method has been found applicable for concentrations of various components up to 571 ppm.
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 7.
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Designation: D3760 − 13
Standard Test 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* D6809 Guide for Quality Control and Quality Assurance
Procedures for Aromatic Hydrocarbons and Related Ma-
1.1 This test method covers the determination of the purity
terials
of isopropylbenzene (cumene) by gas chromatography.
E29 Practice for Using Significant Digits in Test Data to
1.2 This test method has been found applicable to the
Determine Conformance with Specifications
measurement of impurities such as nonaromatic hydrocarbons,
E260 Practice for Packed Column Gas Chromatography
benzene, ethylbenzene, t-butylbenzene, n-propylbenzene,
E355 Practice for Gas ChromatographyTerms and Relation-
alpha-methylstyrene, sec-butylbenzene, and
ships
diisopropylbenzene, which are common to the manufacturing
E691 Practice for Conducting an Interlaboratory Study to
process of isopropylbenzene. Limit of detection for these
Determine the Precision of a Test Method
impurities is 10 mg/kg (see 5.1). This method has been found
E1510 Practice for Installing Fused Silica Open Tubular
applicable for concentrations of various components up to 571
Capillary Columns in Gas Chromatographs
ppm.
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. Summary of Test Method
1.4 The values stated in SI units are to be regarded as
3.1 A known amount of internal standard is added to a
standard. No other units of measurement are included in this
sample of isopropylbenzene. The prepared sample is mixed
standard.
and analyzed by a gas chromatograph equipped with a flame
ionization detector (FID). The peak area of each impurity and
1.5 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
a manufacturing process. It may also be used in development
1 or research work involving isopropylbenzene.
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
4.2 This test method is useful in determining the purity of
Subcommittee D16.07 on Styrene, Ethylbenzene and C9 and C10 Aromatic
isopropylbenzene with normal impurities present including
Hydrocarbons.
Current edition approved June 1, 2013. Published June 2013. Originally diisopropylbenzenes. If extremely high boiling or unusual
approved in 1979. Last previous edition approved in 2012 as D3760 – 12. DOI:
10.1520/D3760-13.
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 − 13
4
TABLE 1 Recommended Operating Conditions
where such specifications are available. Other grades may be
Column A Column B used, provided it is first ascertained that the reagent is of
Detector Flame Ionization Flame Ionization sufficiently high purity to permit its use without lessening the
Column:
a
...
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: D3760 − 12 D3760 − 13
Standard Test 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*
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). This
method has been found applicable for concentrations of various components up to 571 ppm.
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 7.
2. Referenced Documents
2
2.1 ASTM Standards:
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E260 Practice for Packed Column Gas Chromatography
E355 Practice for Gas Chromatography Terms and Relationships
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1510 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 A known 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
area of the impurity. Purity by GC (the isopropylbenzene content) is calculated by subtracting the sum of the impurities found from
100.00. Results are reported in weight percent.
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of Subcommittee
D16.07 on Styrene, Ethylbenzene and C9 and C10 Aromatic Hydrocarbons.
Current edition approved Dec. 15, 2012June 1, 2013. Published January 2013June 2013. Originally approved in 1979. Last previous edition approved in 20082012 as
D3760 – 08.D3760 – 12. DOI: 10.1520/D3760-12.10.1520/D3760-13.
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.
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 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3760 − 13
TABLE 1 Recommended Operating Conditions
colwidth="0.84in"/COLSPEC
ColumnColumn
ColumnColumn B
A
Detector Flame Ionization Flame Ionization
Column:
Tubing fused silica fused silica
Stationary phase polyethylene glycol methyl silicone
Solid support crosslinked crosslinked
Film thickness 0.25 μ 0.5 μ
Length, m 50 50
Diameter, mm 0.32 mm ID 0.32 mm ID
Temperatures:
Injector, °C 275 275
Detector, °C 300 300
Oven:
Initial, °C
...
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