Dihydroxyethyl Ether - ACS Publications

Inverse matrix. X. Successive approx._____. Graphical- ck-1,4-lsomer in 1,4-Polyisoprene. R. . B. SMALL, Polymer Carp., Ltd., Sarnia, Ontario, Canada...
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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

0.11 I f0.05 9.5-

0-4

CIIHtlPOl

I

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

11.1

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 _ _ __ ~ 0.70 20 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-

2.46~ (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.