is 14.315 granis per cc., and the U--i"\' bond distance for coordination number 6 is 2.4449 A.
were plotted against 9 tan q (where @ is the complement of the Bragg angle), and the calculated least sauares fit was linearly extrapolated to 6 tan 9 = 0. The y intercept obtained was 4.8897 A. After correcting for the refraction of filtered copper radiation by UK, the precision lattice constant is 4.8899 A. at 26'. Therefore, the theoretical density
LITERATURE CITED
E.,~ ~s. c., ~ Kilson. 8 . S., McDonald, R.h.,J . d m . Chem. SOC.70,99 (1948).
(1) Rundle, R.
ACKNOWLEDGMENT
The authors wish to thank 0. H. Kriege and B. D. McCarty for their analytical assistance, and Vernon B. Taylor for his general assistance.
~
CRYSTALLOGRAPHIC data for publication in this section of - ~ I A L Y T I ~ A CHEMISTRY L should be sent to K , C. RicCrone, Jr., 1lcCrone Associates, 501 East 33nd St., Chicago 16, Ill.
~
Determination of Geranyl Acetate in Geranyl Formate A. J. FENTON, The Procter a n d Gamble Co., Cincinnati, O h i o
x
slit
B I. Points
(mm)
Concn. gll length
Ax
mm
I
1
Component Name Formula
No.
- ' - I - ' -1 i
Accuracy
' Range i %
%
1 C I ~ H ~ O O ?0-20
Geranyl acetate
~
&0.2
I-___-
I
I
,I
CS-66
1
8.1 7.938.22
1
1
300
200
0.040~I 0.05
Calculation:
L. R. KlLEY a n d R. T. SCHEDDEL, The D o w Chemical Co., Midland, Mich.
CS-68 Sllt
I I
1
2
x
~ccuracy
Componei I Range Name Formula %
No.1
%
or v B 1. Pts.
11
Concn.
(mm)
70
A x or Av
length mm
1,Z-Dichloroethane
~
Instrument: Perkin-Elmer M o d e l 321, NaCl prism Sample Phase: Solution in carbon disulfide Cell Windows: NaCl Absorbance Measurement:
Analysis of Carbon Tetrachloride for Trace Impurities
2-Propanone
~
Base line
Graphical ~
Relative Absorbance-Analytical Matrix: Camponent/h
Carbon disulfide
- ____I _ _ _ _ _
8 . 1 ~ 4
1.67
1
5.86.8
Material Purity: Reference compounds 99 +Tc pure Comments: The absorbance i s expressed as the slope o f the Beer's l a w curve in absorbance p e r 1007' of constituent. Calibration curve passes through -0.033 absorbance a t 0% acetate.
~
Trichloromethane
_____ 5
'
8 . 2 ~ 0.491
100
7.5- ' 0 . 0 4 4 ~0.1
1
8.6
I______---
C2HC13 0-0.15
Trichloraethylene
-1-
0-0.151&0.05
CHC13
0 . 0 3 9 ~ 0.1
zkO.005
~
I 1
10.711 0.782 100 10.60 . 0 5 4 ~ 0.1 10.9
_ _ _ ~ _ _ _ _ _ _ _ _ _ _
I
Determination of Citronellyl Acetate in Citronellyl Formate A. J. FENTON, The Procter a n d Gamble Co., Cincinnati, O h i o
Na.1
1
i
Component Name Formula Citronellyl acetate
I
I
I
Range
Accuracy
%
%
C12H2202 0-20
*0.3
CS-67
slit
6.1.
hm)
Concn. g/l length
Paints
Ax
mm
8.1 7.75
0.300
200
Cell Windows: NaCl Absorbance Measurement: Calculation:
Relative Absorbance-Analytical Matrix:
5 6
Componentlx 1
8 . 1 ~ 1.68
1 0 . 9 5 ~ 0.821 10.80.05611
100 0.1
11.2
Base l i n e - X
Inverse matrix--G r a p hica I L L
Material Purity:
0.068 0.000 0.000 0.000 0.000
0.000
0.000
2.740 0.000 0.000
0.000 0.000
Point-
Successive opprox.-
Relafive Absorbances"-Analyticol Matrix: Component/X 3.35 5.75 6.5
Graphical
Base line
, 10.005
Instrument: Baird Associates M o d e l A, NaCl prism Sample Phose: Full strength
1 2 3 4
Calculation:
0-0.15
I
0.040~ 0.05
Instrument: Perkin-Elmer M o d e l 321, NaCl prism Sample Phase: Solution in carbon disulfide Cell Windows: NaCl Absorbance Measurement:
C?CId
I
x __
Perchloroethylene
0.000 0.000
0.458 0.000 0.000 0.000
8.2
10.7
10.95
0.000
0.000
0.000 0.000
0.000 0.000 0.000 0.000 0.032
0.000
0.000 0.047 0.000
0.000
0.000 0.000
0.000 0.093
Reference compounds 99 +% pure
Material Purity: Reference compounds 99 +% pure Comments: Absorbance expressed as slope of Beer's l a w curve in absorbance p e r 1OOyo o f constituent. Calibration curve passes through 0.075 absorbance a t 07, acetate.
O4 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 0.157, o f constituent.
These d a t a represent standard publication a n d submission is open t o anyone in accordance with regulations of ANALYTICAL CHEMISTRY. T h e Coblentz Society is acting only a s a n aid t o t h e journal.
T o standardize procedures. ~ K A L Y T I C A LCHEMISTRY reques-s t h a t material be sent in quintuplicate t o t h e chairman of the reT-iew coiiimittee: Robrrt C. Wilkerson, Celanese Corp. of America. Post Office Box 8. Clarkwood. T e x .
VOL. 31, NO. 1, JANUARY 1959
157
