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Infrared Quantitative Analysis Data. CS-135 Determination of m-Toluidine in N-Ethyl-m-Toluidine. K B. Whetsel, W E. Robinson, and M W. Krell. Anal. Ch...
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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.