• ASTM D6144-17

ASTM D6144-17

Standard Test Method for Analysis of AMS (alpha-Methylstyrene) by Capillary Gas Chromatography

ASTM International , 06/01/2017

Publisher: ASTM

File Format: PDF

$32.00$64.00


1.1This test method covers the determination of the purity of AMS (α-methylstyrene) by gas chromatography. Calibration of the gas chromatography system is done by the external standard calibration technique.

1.2This test method has been found applicable to the measurement of impurities such as cumene, 3-methyl-2-cyclopentene-1-one, n-propylbenzene, tert-butylbenzene, sec-butylbenzene, cis-2-phenyl-2-butene, acetophenone, 1-phenyl-1-butene, 2-phenyl-2-propanol, trans-2-phenyl-2-butene, m-cymene, p-cymene, and phenol, which are common to the manufacturing process of AMS. The method has also been found applicable for the determination of para-tertiary-butylcatechol typically added as a stabilizer to AMS. The impurities in AMS can be analyzed over a range of 5 to 800 mg/kg by this method. (See Table 1.) The limit of quantitation for these these impurities averages 4 mg/kg, while the limit of detection averages 1.2 mg/kg. (See Table 1.)

Compound

Repeatability (r)

Reproducibility (R)

Range Studied

Acetone

1.61 + 0.035*Acetone

0.47 + 1.10*Acetone

0.5 - 26

Cumene

−0.46 + 0.031*Cumene

7.88 + 0.19*Cumene

45 - 290

nPropylbenzene (NPB)

2.11 + 0.03*NPB

−7.81 + 0.37*NPB

55 - 195

Phenol

1.84

3.65 + 0.58*Phenol

1 - 40

tertButylbenzene (TBB)

−1.22 + 0.035*TBB

3.63 + 0.087*TBB

150 - 650

secButylbenzene (SBB)

4.23 + 0.019*SBB

21.60 + 0.25*SBB

200 - 765

mCymene

0.31 + 0.035*mCymene

2.34 + 0.35*mCymene

2 - 50

oCymene

1.63

8.00

29 - 31

pCymene

5.12

15.79

10 - 18

cis-2-Phenyl-2-Butene (CPB)

0.17 + 0.030*CPB

5.39 + 0.11*CPB

50 - 225

trans-2-Phenyl-2-Butene (TPB)

1.57

0.54 + 0.20*TPB

19 - 70

1-Phenyl-1-Butene (PB)

4.00 + 0.018*PB

0.17 + 0.19*PB

0.2 - 735

Acetophenone (AP)

-1.09 + 0.15*AP

1.17 + 0.63*AP

15 - 115

para-tert-Butylcatechol (PTBC)

2.21

17.82

10 - 19

2-Methylbenzofuran (MBF)

0.33 + 0.76*MBF

0.75 + 0.60*MBF

1 - 2

2-Phenylpropion aldehyde (PPA)

0.59 + 0.11*PPA

0.29 + 0.23*PPA

1.5 - 15

α-Methylstyrene Oxide (AMSO)

4.61

6.51 + 0.23*AMSO

13 - 32

DimethylBenzyl Alcohol (DMBA)

0.38

0.55 + 2.03*DMBA

0.1 - 1

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