Your shopping cart is empty!
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
$27.00 $54.00
$32.00 $64.00
$30.00 $60.00
$18.00 $37.00
$26.00 $52.00