~
Determination of 2-, 3-, and 4-Ethyltoluene in Ethyltoluene Mixtures CS-29
1. R. KILEY, The D a w Chemical Co., Midland, Mich. Slit Component Range % Name !Formula
No.
--
1
2-Ethyltoluene
2
3-Ethyltoluene
1
4-Ethyltoluene
Concn. mglml length
(mm)
AX ar Av
~
100 0.1
~
1
100 CQH12 0-100 lt1.0 12.83 0.610 CsH1o Cyclo0.108 0.1 - - - ~ - hexene C9H12 0-100 f1.0 12.29 0.530 100 0.096 0.1
I
I
I
TI
I
Insfrumenf: Perkin-Elmer Model 12, NaCl prism Sample Phase: Solution in carbon disulfide Cell Windows: NaCl Absorbance Measurement: Calculation:
Base line-
Inverted m a t r i r GraphicalX
Relafive Absorbances"-Analytical
P o i n t X
3 Maferial Purity:
12.29~ 0.033 0.040 1.109
Calculafion:
R. C. WILKERSON, M. C. HARVEY, and R. M. GUEDIN Celanese Carp. of America, Clarkwood, Tex.
Component Name Formula
T!Ethane
I I
2
3
Propane
~
,
~
I
-
C2He
csns
I
X or v
Range
yo
%
Pfs.
B.L.
Slit
Concn.
(mm) AX or
mm Hg
Lengfh cm
~ _ _ _ _ _ 0-50 +0.5 12.30 0.631 0.112 ~
0-50
~
10.5
I I
9.35
a,
,
j 0.074
j 0.342 ~
1
I
_ 600 10
1 2
3 4
~
ClHlo
1
0-50
~
10.5
~
8.45
~
Cell Windows: AgCl Absorbance Measuremenf: Calculation:
Base line-
Inverted matrix Graphical-
Relative Absorbances"-Analytical
12.30~ 1 0.664 2 0.033 3 0.090 4 0.082 Material Purity: 99 +%
ComponentlX
X
I
0.555 110 0.100 1.0
I
I
0-100
I
il 0
I
I
0.295 8*91 0.065 10 28 *
0 355 0:070
~
I
10 1.0
1
10 1.0
Base line-
P o i n t X Successive approx-
Mafrix:
13.91~ 0.059 0.509 0.008 0.019
8.911 0.083 0.039 0.507 0.146
10.28~ 0.048 0.031 0.023 0.653
Reference compounds 99 +Yo pure
Relative absorbances are given as the slope of the Beer's law concentration curves used expressed in terms of absorbance per 100% of constituent.
Determination of N-(P-Hydroxyethy1)phenylacetamide in Presence of Ethanolamine and Ethyl Phenylacetate CS-32
W. H. WASHBURN, Abbotf Laboratories, North Chicago, 111. Slit
700 10
Instrument: Perkin Elmer Model 12-C, NaCl prism Sample Phase: Gas
No./
Component Name Formula
1
Range
IConcn. mg/ml AX or ;length
Accuracy
(mmJ
%
Av
mm
____
*l ~
~
0.094 120.0 0.034 0.10
A:ibO,Znt shoulders
Instrument: Perkin-Elmer Model 21, NaCl prism Sample Phase: Solution in CHCls Cell Windows: NaCl Absorbance Measuremenf:
P o i n t X
Base line
X
Point-
Successive approx.Calculafion: Matrix:
9.35~ 0.002 0.353 0.012 0.037
8.45~ 0.003 0.078 0.728 0.012
10.30~ 0.002 0.031 0.013 0.711
Relative absorbances are given as the slope o f the Beer's law concentration curves used expressed in terms of absorbance per 1 OUyo of constituent. Any olefins present must be removed before the analysis is made. a
*l.O
% 0.281 200 0.067 10 1 N-(P-HyCioH13N02 90~-~~~~ 100 droxyethyl) n-Butane CaHlo 0-50 10.5 10.30 0.438 350 phenyl0.086 10 acetamide Isobutane
12.32
CS-30
I
I Accuracy
I I
I
12.32~ 0.639 0.049 0.016 0.024
Componentlh
Analysis of Ethane, Propane, Isobutane, and n-Butane
No.
0-100
Inverted matriGraphical-
Material Purity:
I
I
Relafive Absorbances"-Analytical
Relative absorbances are given as the slope o f the Beer's law concentration curves used expressed in terms o f absorbance per 100% o f constituent.
I 1
I
1.0
Cell Windows: NaCl Absorbance Measurement:
Matrix:
12.831 0.078 0.657 0.072 Reference compounds 99 +yo pure
1 2
0-100 111.0
Concn.
Insfrument: Perkin-Elmer Model 12, NaCl prism Sample Phase: Solution in carbon disulfide
Successive approx.-
13.26~ 1.044 0.147 0.043
ComponentlX
Slif
1
13.26 0.695 0.123
cs-3 1
I
Component mm % Pts. Name Formula - ~ -No./ -
11.0
Cyclohexanone,
R. T. SCHEDDEL, The D a w Chemical Co., Midland, Mich.
- ~ - - -I - - I
3
0-100
C9H12
X or v B.L.
Accuracy
Analysis of Phenol, Cyclohexene, Cyclohexanol Mixtures
Inverted matriGrophicalX
Successive approx.-
Relative Absorbonces@-Analyticul Mafrix: ComponentjX
1
6.05~ 0.454
Material Purity: Reference compounds 99 $70 pure Commenfs: Compensation required for CHCla band at
6.55~
Relative absorbances are given as the slope of the Beer's law concentration curves used expressed in terms of absorbance per 100% o f constituent. a
VOL. 30, NO. 2, FEBRUARY 1958
0
305
