Norm

ASTM D7266-13e1

Standard Test Method for Analysis of Cyclohexane by Gas Chromatography (External Standard)

54,27

Over deze norm

Status Definitief
Aantal pagina's 6
Commissie D16.01
Gepubliceerd op 01-02-2013
Taal Engels

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.

TABLE 1 Impurities Known or Suggested to be Present in Commercial Cyclohexane

 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.

Details

ICS-code 71.080.10
Nederlandse titel Standard Test Method for Analysis of Cyclohexane by Gas Chromatography (External Standard)
Engelse titel Standard Test Method for Analysis of Cyclohexane by Gas Chromatography (External Standard)

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