Determination of Benzene and the
C7- to CloMethylbenzenes CS-114
D. E. NICHOLSON a n d S. H. HASTINGS, Humble O i l 8 Refining Co., Bayfown, l e x .
Component Name
-
No.
Range
Accuracy
X or v
%
6.1. Pfs.
Formula
1
Slit ( m m )
1 ~
16.20~
hl.0
0-100
AX or Av __ 0.218
Cancn. g/liter length, mm
1 0.100
Methylbenzene
0-100
h0.5
1,4-Dimethylbenzene
0-100
h0.5
1,3-Dimethylbenzene
0- 100
10.5
1,B,J-Trimethyl benzene
0- 100
hl.0
19.36~
1,2,4-TrimethyIbenzene
0-100
zk0.5
18.49~
h1.5
18.54~
0-100
1
j
CiaHir
1,2,3,4-Tetramethylbenzene
CiaHir
I
1 0.100
1
0.324 ~
I
3~0.5
1,2,3,5-TetramethyIbenzene
'
11
22.93p
0.528
0.100
1,2,4,.5-Tetramethylbenzene
1
0.533
h0.5
1,2,3-TrimethyIbenzene
10
23.13~
0-100
1,2-Dimethylbenzene
0-100
1.0.5
18.17~
0-100
h0.5
18.06~
1
1 0.100
0.290
1
0*292 0.495
0.100 1 0.100 1 0.100 1 0.100
0.273
1 0.100
Instrument: Perkin-Elmer Model 1 12, CsBr prism Sample Phase: Solution in carbon tetrachloride Cell Windows: CsBr Absorbance Measurement: Calculation:
Base line-
Inverse matrixGraphical-
P o i n t X Successive a p p r o x . 2 -
Relative Absorbances-Analytical Matrix:
16.20~ 0.200 0.069 0.033 0.029 0.041 0.027 0.033 0.032 0.000 0.027 0.043
ComponentlX
1 2 3 4
5 6 7 8 9 10 11
21.50~ 0.01 6.89 0.22 0.05 0.05 0.03 0.07 0.04 0.06 0.03 0.15
20.60~ 0.01 0.13 12.10 0.03 0.05 0.02 0.04 0.10 0.00 0.03 0.14
23.13~ 0.06 0.06 0.05 3.61 1.49 0.02 0.61 0.03 0.12 0.02 0.03
22.93M 0.02 0.07 0.06 1.67 3.70 0.02 1.51 0.03 0.25 0.02 0.03
19.361 0.015 0.072 0.089 0.197 0.070 0.284 0.052
0.073 0.010 0.070 0.052
18.49~ 0.02 0.05 0.05 0.05 0.04 0.03 2.23 0.36 0.00 0.14 0.13
18.54~ 0.023 0.050 0.054 0.042 0.034 0.034 1.600 0.388 0.000 0.131 0.119
22.43~ 0.02 0.12 0.08 0.13 0.18 0.02 0.42 1.94 2.94 0.02 0.03
18.06~ 0.023 0.031 0.052 0.033 0.040 0.030 0.157 0.044 0.000 0.434 1.587
18.17~ 0.022 0.033 0.053 0.036 0.041 0.032 0.167 0.054 0.000 1.650 1.015
99.9%
Material Purity:
Comments: To obtain maximum accuracy in the final analytical result, it i s necessary to combine the infrared data on actual samples with molecular weight distribution b y mass spectrometry.
Determination of Methylindanes
S. H.
HASTINGS a n d D. E. NICHOLSON, Humble Oil 8 Reflning Co., Baytown, l e x .
CS-115
I
Insfrument. Perkin-Elmer Model 1 12, CsBr prism Sample Phase: Solution in carbon tetrachloride
I
Component mm
indane -I
2
11
2-Methylindane
-
indane
indane
138
1
Calculafion:
'
~ _ _ _ _ _ _ 0-100 f2 claH1'
1
I
~
iyG~1 2 -!
~
Cell Windows: CsBr Absorbance Measurement.
~
1 *'
ANALYTICAL CHEMISTRY
j I
__ 0.578
~ _I _ 2 0 . 2 6 ~ 0.360 ~
-1-
2 3 . 7 6 ~ 0.565 ~
0.100
1
___ 1
i
0.100 _
0.100 1
~
1
~
' o'loo 1
Base line-
Inverse matrixGraphical-_--
PointXSuccessive o p p r o x . 2 -
Relative Absarbance~AnalyticaIMatrix: Campanent/X _ _
21 3 4 Material Purity:
22.43~ 1.090 0.065 0.055 0.101 95%
24.03~ 0.508 1.562 0.035 0.840
20.26~ 0.061 0.402 0.279 0.093
23.76~ 0.407 0.946 0.033
1.779
