Determination of 1,2-Epoxy-2-MethyIpropane in Mixed Epoxybutanes 1. R. KILEY, The D o w Chemical Co., Midland, Mich. ~~
~~
cs-4
~~
I
Componenf
_______
- ._____
1.
1.2-Epoxy-2methylI propane '
' ______
~~~~
phenol
0.0691 0.6
lnstrument: Perkin-Elmer M o d e l 1 12, KBr prism Sample Phase: Full strength Cell Windows: KBr Absorbance Measurement: Calculation:
Calculation:
Inverted Matrix-G r a p hica I-_
Matrix:
ComponentlX
14.5
9.7
9.1
1.
1.060 0.088 0.040 0.029
0.145 0.654 0.040 0.025
0.070
4.
14.55 2.230
Material Purify: Reference compounds 99 +yo pure Comments: Samples o f epoxybutanes, frequently containing water, should b e salted out with KBr prior t o loading into infrared cells. Other epoxybutones d o not interfere a t 1 4 . 5 5 ~ .
Point-X Successive A p p r o x . 2 -
Relative Absorbancesn-Analytical
2. 3.
Mafrix:
ComponenflX 1.
Base-Line---
"The relative absorbance is given as the slope o f the Beer's l a w concentration curve used expressed in terms o f absorbance p e r 1 0 0 ~ oo f constituent.
13.8 0.060 0.059 0.032 1.260
0.055 0.960 0.165
Point-
Successive Approx.---
Relafive AbsorbancesQ-Analyfical
Insfrument: Perkin-Elmer M o d e l 12, NaCl prism Sample Phose: Solution in corbon disulfide Cell Windows: N a C l Absorbance Measuremenf:
Base-Line-X
Inverted Matrix--G r a phica L A -
Material Purify: Reference compounds 9 9 +% pure Commenfs: Samples a r e melted and thoroughly mixed prior to preparing solutions.
Determination of 2,4-Dichlorophenol, 2,bDichlorophenol, 2,4,6-Trichlorophenolr 2,3,4,6-Tetrachlorophenol, and Pentachlorophenol in Higher Chlorophenol Mixtures R.
T. SCHEDDEL and 1. R.
KILEY, The D o w Chernicol Co., Midland, Mich.
cs-5
a Relative absorbances a r e given as the slope of the Beer's l a w concentration curves used expressed in terms o f absorbance per 100% o f constituent.
Concn. mg/ml lengfh mm
Slit
Component
fmm) Range 'Accuracy
Ah o r
8.1.
Av
0.550 10 0.099 0 . 6
Determination of Ethylbenzene, Styrene, and Vinyl Cyanide in Comonomer Mixtures
~cs-3
1. R. KILEY, The D o w Chemical Co., Midlond, Mich.
I I
Component No,
,
Name
Range IAccuracy
%
Formula
~______ I _ _ _ - _ _
%
I__--
orv 8.1. Pts.
1 ~
Slif
Concn.
(mm) AX o r
mglml
Av
mm
0.950 10 0.166 0.6
lengfh
0.800 10 0.140 0.6 ~
1.
2Zl.01 13.4 0.750 10
Ethylbenzene
C"'u 2.
0-50
,
I Vinyl cyanide
~
0.132
1.0
xkl.0 10.1 0.350 10 10.070 1.0
Styrene
I 3.
~
CJH3N
~
0-50
i, 2Z0.5
0.700 10 0.123 0.6
1
I
10.4 0.350 10 0.069 1.0 ~
I
Instrumenf: Perkin-Elmer M o d e l 12, N a C l prism Sample Phase: Solution in carbon disulfide
Insfrumenf: Perkin-Elmer M o d e l 12, N a C l prism Sample Phase: Solution in carbon disulfide
Cell Windows: NaCl Absorbance Measuremenf:
Cell Windows: N a C l Absorbance Measuremenf:
Calculafion:
Calculation:
Base-Line---
Inverted M a t r i x - L Graphical---
Relafive Absorbancesa-AnalyficaI
Point-X
Mafrix:
13.4
10.1
10.4
1.
0.577 0.028 0.019
0.028 0.780 0.244
0.049 0.049 1.636
3.
Inverse M a t r i x - X G r o p hica I-.--
Relative Absorbancesn-Analyfical
Successive Approx.---
Componenf/X
2.
Base-Line--
Point-X Successive Approx.-
Mafrix:
ComponenflX
12.3
13.1
13.7
13.3
13.0
1. 2.
0.591 0.060 0,203 0.201 0.012
0.020 0.982 0.032 0.098 0,229
0.158
0.028 0.098 0.041 0.464 0.029
0.016 0.000 0.029 0.059 0.581
3.
4. 5.
0.000
0.543 0.025 0.040
Reference compounds 9 9 +% pure
Material Purify: Reference compounds 9 9 +% pure Comments: Samples a r e melted and thoroughly mixed prior to preparing solutions.
Relative absorbances a r e given as the slope o f the Beer's l a w concentration curves used expressed in terms o f absorbance per 1007' o f constituent.
a Relative absorbances a r e given as the slope o f the Beer's l o w concentration curves used expressed in terms of absorbance per lOOqZ of constituent.
Maferial Purity: Commenfs:
VOL. 29, NO. 10, OCTOBER 1 9 5 7
1553
