ASTM-D7266 › Historical Revision Information
Standard Test Method for Analysis of Cyclohexane by Gas Chromatography (External Standard)
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Scope
1.1 This test method covers the determination of the purity of cyclohexane by gas chromatography. Calibration of the gas chromatography system is done by the external standard calibration technique.
1.2 This test method has been found applicable to the measurement of impurities such as those found in Table 1, which are impurities that may be found in cyclohexane. The impurities can be analyzed over a range of 3 to 200 mg/kg by this method, but may be applicable to a wider range.
C4 |
(1) n-butane |
(2) isobutene |
C5 |
(3) n-pentane |
(4) isopentane |
(5) cyclopentane |
C6 |
(6) n-hexane |
(7) 2-methylpentane |
(8) 3-methylpentane |
(9) methylcyclopentane |
(10) benzene |
(11) cyclohexene |
(12) 2,2-dimethylbutane |
(13) 2,3-dimethylbutane |
C7 |
(14) 3,3-dimethylpentane |
(15) 2,2-dimethylpentane |
(16) 2,3-dimethylpentane |
(17) 2,4-dimethylpentane |
(18) 1,1-dimethylcyclopentane |
(19) trans-1,3-dimethylcyclopentane |
(20) trans-1,2-dimethylcyclopentane |
(21) cis-1,2-dimethylcyclopentane |
(22) 2,2-dimethylcyclopentane |
(23) 2,4-dimethylcyclopentane |
(24) cis-1,3-dimethylcyclopentane |
(25) ethylcyclopentane |
(26) methylcyclohexane |
(27) 3-ethylpentane |
(28) 3-methylhexane |
(29) 2-methylhexane |
(30) n-heptane |
(31) toluene |
C8 |
(32) iso-octane |
(33) p-xylene |
C9 |
(34) isopropylcylohexane |
1.3 The limit of detection is 1 mg/kg.
1.4 In determining the conformance of the test results using this test method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.
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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.
Significance and Use
5.1 This test method is suitable for setting specifications on the materials referenced in Table 1 and for use as an internal quality control tool where cyclohexane is produced or is used in a manufacturing process. It may also be used in development or research work involving cyclohexane.
5.2 This test method is useful in determining the purity of cyclohexane with normal impurities present. If extremely high boiling or unusual impurities are present in the cyclohexane, this test method would not necessarily detect them and the purity calculation would be erroneous.
Keywords
analysis by gas chromatography; benzene; cyclohexane; ICS Number Code 71.080.10 (Aliphatic hydrocarbons)
To find similar documents by ASTM Volume:
06.04 (Paint -- Solvents; Aromatic Hydrocarbons)
To find similar documents by classification:
71.080.10 (Aliphatic hydrocarbons)
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Document Number
ASTM-D7266-13e1
Revision Level
2013(E1) EDITION
Status
Superseded
Modification Type
Editorially changed
Publication Date
April 15, 2013
Document Type
Test Method
Page Count
6 pages
Committee Number
D16.01