infrared Analysis of o-Tricresyl Phosphate in Paraffinic Mineral Oil
I i
Component Formula Name
No.
1
o-Tricresyt phosphate
Range
%-I
Concn.
Accuracy
X orv B.L.
Slit (am) AX ar
yo
Pts.
AY
I f0.05
0-4
CIIHtlPOl
I
0.11 9.511.1
c197
R. M. 8. SMALL, Polymer Corp., LM., k m i o , Ode, Canada
cs95
0. W. RECKTENWALD, General Electric C6., Louisville, Ky.
~
Acrylonitrile in AcrvlsnibilaButadiene Copolymer
Cancn. mglml Length mm
Component Formula
No. Name -___ 1
0.11 100 0 . 0 5 8 ~ 0.1
Acrylonitrile
-CaHt&
2400 2230 2200
i
30 cm-l 0.0060
4.0cm-'
lndrumenf: Perbin-Elmer Model 21, NaCl prism Sampk Phase: W i d film, hot-pressed
Cell Windows: Mica sheeh Absorbance Measurement: B o w U n e L Calculation:
Inverse matrixG r a p h l c a U
Point___
Successive ap ax.r
Relotive Abrorbances"-Analyfica/ Matrix: Component/X [A 2 Y i o / A
2~0]oln
plotted againsf A
z.,,
gives a family of
curves for varying per cent acrylonitrile. For the range 20-40%, abscissa ronge is 0.30-0.60, ordinate: 0.930-1.422 Material Purify: Purified pdymers, analyzed by Dumas method for nitrogen, used as standards. Calibration accuracy estimated A0.5%. Comments: en accuracy.
Singlicate prac-sion u = 0.2%.
Soap and antioxidant less-
Relative absorbances are given as the slope of the Beer's law concentration curves used expressed in terms of absorbance per 100% o f comtituen?.
Determination of 1,2-EthanedioI, 1,2-Propanediol, and 2,2'-Dihydroxyethyl Ether S. PINCHAS, The Welzmann Institute of Science, Rehovath.
I
No.
Component Name Formula
I
I
1
1,Z-Ethbnediol
2
1,P-Propanediol
I
%
Accuracy
%
X or
Y
0.1. Pts.
Slit
Concn. mg/mf Length
(mm)
AX or
AY
mm
.___
0.70 20 0.122p 0.5 _ _ __ ~ 20 0.70 0.120p 0.5
3
CS-96
1
1 1 I Range
Israel
___-
0.45 0.151p
2,2'-Dlhydroxyethyl
I
20
0.2
I
Calculotion:
Base line-
Inverse m a t r i x X Graphical-
Refotive Absabancosa-Anolytical Component/ A
No.
corp., LM.,
Component Noms Formufa
CS-98
his, ontorio, bnoda
Accu-
Xarv
Ronge
mcy
%
%
8.1.
Concn.
Slit (mm) AXar
w/w%
length cm
Pfs.
- ~ ~ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 c;s-1,42.5 Potyi-CbHs-l 0-100 5 2 . 4 6 ~ 0.096 1.0
i
prene
~-
~~
~
~
~~
lndrument: Beckman Model DK 2 Sampk Phase: Wutlon in carbon tetrachloride
CeH Windows: Corex Absorbance Measurement: Calculotion:
Base N n e L
Inverse m a t r i x X Graphical-
ComponentlX cis- 1,4-PoIyisoprene trans- 1,4-PoIyisoprene
Poin-
Note: Hevea.
Successive approx.--
Point-
Successive approx-
2 . 4 6 ~(conc. w./w. % at 2.5%) 0.166
0.127
Sample run differentially against a 2.5% solution of purified
Moteriol Purity: Extensively purified Hevea and Balata assumed 98'% cis- and 98% trans-l,4-poiyisoprene
Matrix:
863 cm-' 35.3 4.6 9.5
R. M. E. SMALL, Polymer
Relative Absorbancee-Analytical Matrix:
Instrument: Perkin-Elmer Model 12 C, NaCt prism Sample Phose: Solution in acetonitrile Cell Windows: NaCi Absorbonce Meanrroment:
ciCl,4lsomer in 1,QPolyiroprene
837 cm-' 7.4 22.9 4.9
1131 cm-' 1.95 11.4 28.1
Reference compounds were rectified commercial prod-
Comments: Insensitivity o f method to microstructure changes relative to impurity effects makes purification and thorough drying of sample essential. light scattering creates sloping background. Value at 2 . 4 6 ~cokvlated b y extrapolating a plot of absorbance vs. X-' through the points X = 1.000. 1.100, 1.325, 1.550A. Spectral slit width not available.
Relative absorbances are given as the absorbonce which a 1 gram per mi. solution would have in the cell in which the measurements are made.
Relative absorbances are given os the dope o f the Beer's law concentrotion curves used expressed in terms of absorbance per 1 0 0 ~ oof constituent.
2 3 ,+laterial
Purity:
ucts a
These data repreaent atandard publication and submission is open to anyone in uccordanee with regulations of ANALYTICAL CHEYIIITRY.The Coblentz Society is acting only as an aid to the journal.
1742
ANALYTICAL CHEMISTRY
To standardize procedure. ANALYTICAL CAEMISTEY ;equ-ta that material be sent in uintuplicate to the chairman of the review committee: D . E. Nicholson. (hesearch and Development Division. Humble Oil Refining C o . . P.O. Box 3950. Haytown. Tex.
