Determination of m-Toluidine in KEthyl-m-toluidine
Determination of Alkylbenzenes
K. B. WHETSEL, W. E. ROBERSON, and M. W. KRELL Tennessee Eestman Co., Division of Eorhnon Kodak Co., Kingsport, l e n n .
D. E. NICHOLSON a n d S. H. HASTINOS, Humble O i l 8, Reflning Co., Baytown, l e x .
Component Name
No./
1
1
% ~
CiHgN
~
Concn. mg/ml lengfh cm
Range
1 Formula
m-Toluidine
CS-135
0-10
-1
1
rkO.1
1 9 7 1 ~ 0.53 1915~ 1 . 6 ~
Calculafion:
rz
Accu-
-~ Raze
Formulo
0-100
CsHln
50 10
Insfrument: Cary Model 14, fused silica prism in series with a 600 line/mm. echelette groting Sample Phose: Solution in carbon tetrachloride Cell Windows: Corex Absorbance Measurement:
Componenf
benzene
I
10.5
cs- 137 Y
B.L. Pfs.
13.15
Inverse m a t r i x GraphicalX
i
mm
_______ 0.900 0.079~
I
l.oo 1-00
0.900 O.O8Op,
1.00 1.00
3
12.80
0.680 0.06C~
1.00 1.00
12.28
0.550 0.050~
1.00 1.00
0.550 0.049~
1.00 1.00
1-Methyl-
-I 4
Successive approx.---
,
A h or Av
Concn. g / I O O ml lengfh
13.47
I
Point-
(mmj
2 1 n-Propylbenzene
-~ 3-ethyl-
Base I i n e X
1
Slif
h or
benzene
~-
CgHj2 IO-100
1-Methyl4-ethylbenzene
10.5 ~
I
Relative Absorbancesb-Analyfical Mafrix:
1971~
ComponentlX
1
methylbenzene
6.35 Reference compounds 99% pure
Maferial Purify:
6
Commenfs: For further details o f this t y p e o f analysis, including a differential method, see ANAL. CHEM. 30, 1594 (1958). =The absorbance a t 1 9 1 5 ~i s used os the background correction for the peok absorbance a t 1 9 7 1 ~ . Relative absorbances a r e given as the slope o f the Beer's l a w cancentration curves used expressed in terms o f absorbance per l O O y o o f constituent. The calibration line passes through 0.1 50 absorbance a t Oyc m-toluidine.
I I
9
1
1 -Methyl2-ethylbenzene
10.5
13.27
0.800 0.071i~
1.00 1.00
terf-Butylbenzene
10.5
13.09
0.720 0.064~
1.00 1.00
1 0 . 5 1 12.40
0.600 0.053~
10.5
0.720 I 1.00 0 . 0 6 4 ~ 1.00
0-100
'
methylbenzene 1,2,3-Trimethylbenzene
1
i
CsHl?
I
1
0-100
1
13.C4
1
_-
1.00 1.60
___
Compo- 13.15 13.47 12.80 12.28 11.96 13.27 13.09 12.40 13.04 nent/X H H H H H P H H H
Determination of Clo-Alkylbenzenes CS- 1 36 D. E. NICHOLSON a n d S. H. HASTINOS, Humble O i l 8 Reflning Co., Baytown, l e x .
1 2 3 4 5
6
7 8
9
1.705 0.094 0.030 0.013 0.025 0.255 1.008 0.013 0.204 0.0931.0810.023 0.045 0.0280.2390.075 0.033 0.050 0.1510.0660.6300.0310.0100.132 0.1630.0600.206 0.0570.0230.0681.265 0.0840.0400.0600.375 0.060 O.OC3 0.0040.0040.0202.023 0.0030.0030.0110.003 0 . 2 9 4 0 . 3 6 0 0 . 0 7 2 0 . 0 2 5 0 . 0 1 1 1.3730.1860.032 0.107 0.875 0.0290.032 0.012 0.0360.115 1.5980.013 0.334 0.0080.008 0.015 0.130 0.019 0.008 0.008 1.845 0.009 0.3890.0320.1030.0170.006 0.1080.7370.0162.084
Component Moferiol Purity: No.
Name
Formula
1
1,3-Diethylbenzene
C1oHlr
mm
-~ _ _ _ _ -~
99.8%
Commenfs: The degree of accuracy indicated was obtained b y correctng far deviations from the Beer-Lambert law.
' 0 . 0 5 4 ~ 1.005
I
n-propylColculafion:
-1
I
n-propylbenzene
~
Relafive Absorboncer-Anolytical Mofrix: 12.56~ 1 2 . 8 4 ~ 12.46~ 14.36~ 13.28~ Componenflh
1 1.005
i
-i 5 1
1 1.005
benzene Insfrumenf: Perkin-Elmer Model 1 12, NoCI prism Sample Phose: Solution in corbon disulfide Base line-
P o i n t X
These data represent standard publication and submission is open t o anyone in accordance with regulations of A X A L Y T I ~ ACHEMISTRY. L T h e Coblentz Society is acting a s an aid t o the journal.
1212
Successive opprax.--.
0 . 0 5 3 ~ 1.005
41
Cell Windows: NaCl Absorbance Measurement:
Inverse m a t r i d G r a p h i c a l
ANALYTICAL CHEMISTRY
1 2 3
4 5 Maferiol Purify:
0.547 0.079 0.315 0.028 0.145
0.174 0.982 0.229 0.064 0,104
0.285 0.059 0.786 0.027 0.072
0.424 0.653 0.017 1.160 0,016
0.090 0.056 0.079 0.218 1.788
99.87,.
Comments: The variation in the absorptivity far n-butylbenzene with concentrotion i s approximately 2.1 yc per 0.1 00 unit in absorbance.
To standardize procedure 4 S A L Y T I C A L CHEVISTRY requests that mntr!'ial he sent in quintuplicate t o 'the chairman of the review committee: D E. Nicholson. Research and Delelopment Division, Humble Oil B; Refining C o . , P. 0.Boa 3950, Baytown, Tex.
