I ------1 I I I 1 1 Component
No.1 Name
Formula
Am-
X ori
Slit Imm)
racy
8.l.
Ah or
Fir.
Av
Concn. m//m/ length mm
0.266 0.0281
0.02 0.1
0.289 0.0300
0.02 0.1
Range
%
%
1. p-Xylme
CsHlo
6-100
1
&l,O
2.
CsHlo
0-100
I
zk1.0
m-Xylene
3.1 o-Xylene
~
1 1 I CsHla
0-100
f1,O
1 I
12.6 13.0
1 I
I 1 13.5
0.347 0.0348
0.02 0.1
Solution in carbon disulflde
Slit Xorv
Component
---1.
a.
?'-Miethyl2-ethyl. benzene
1-Methyl. 3-athyl.
-
benzene
3. 1-Methyl4*athyl benzene
CgHiz
5-30
&0.5
tmm) AX or
Av
Conen.a 9iml length mm
-
13.29 0.420 0.09 0.075p 0.166
-
---CQHIZ SO-100
Cakufatfon: Inverted mahlrGraphIcaL
Point& Succeisive a p p r o r , I
Relofive Abrorbcmmra-Analyllcol Mafrlxt
Componentf A
12 $ 6
13.0 0.012 0.422 0.002
0.440
1.
0.002 0.002
2. 3. Material Puriiy:
13.5 0.000
0.002 0.663
Reference compounds 98% pure or better
RelaHve absorbances are glven as the dope of L e Beer's taw con. centratton curves used expreored In termr of absorbance per 100% of constltuent.
Inrfrumenb: Perkln-Elmer Model 21, NaCl prism Sample Phage:
Cell Window:: NaCl Abrorbaanco Mearummenfir Bare line-
f1.0
12.83
0.370 0.00 0 . 0 6 7 ~ 0.166
2z0.6
12.29
0.325
.----
Cell Windowrt KBr Absorbance Meawremenh Bare lineColculatian:
P o l n t X
Inverted m a t r 1 L Successive,,o,xapr Grophlcal-
Reloiive Abrorbance,L-Analyficcrl Componeni/h 1. 2. 3.
13.29 1 ,0800 0 .OS960 0.02179
Mairlxr
12 .E3 0.1038 0,5604 0.02959
12.29 0.0321 0.05834 1.0180
Reference compounds API standard samplas, Commenfr: Other Ct olkylbenzene Isomers must be absent. Concentrafion of unknown sample might vary 50% especlolly to keep major component 2 In preferred absorbance range, Relative absorbances are glven as the slope of the Beer's law can. centration curves used expressed In termr of abrorbance per 100% of constituent, Mafarial Furltyt
Col.II?
0-15
,
0.09 0,062p 0,166
Inslrumeni: Perkin-Elmer Modal 21, NaCI prism Ssmgle Phase: Solution In rnethylcyclohexane
Calcufofion: Inverted m a t r i L Succerrlve approx.GraphlcolRelative Ab:orbanmrO-Analyticot Componentlcm -1
1. 2.
3.
-I
2. 2,3,6-Trlmethylpyrldlne
1--iIl
CaHlIN
0-100
zkl.0 1132 0.17
I00 0.0273
pyridine Instrument! Unlcam 5.P, 100, NaCl prism &wnpfe Phatet Llquld, full 6trength
Cell W i d C W J : kkcl Absorbanre Mea~uremenh Bare line-
e. ANALYTlCAL CHEMISTRY
100
0.0273
P o l n t X
1170 1,006 0.122
0.067
Matrix:
1132 0.136
0.602 0.051
1221 0.042 0.054 0 .QIB
Materlal Purity: Reference compounds, 99 +% pure Commenfrt 100% T adlushent Is set up by adlustlng the lnctrummt k read 08% 1 at 1 180 cm," wlth cyclohexane In ancrlytkol cell. Thla Rgun was origlnally determlned b y urlng a varlablr path erll and setting up tho adjuitments so that a plot of cell length v). a b i c r b o m at 1\80 em.-' was a stralght line patdng through the orlgln. Thr hue abt~rbaneoof 0.0273 mm, ob cyclohenone can then be read from this graph. b m p l e i are drled over KOH pellets. a Relative oblorbances are Olven as the slope of the Beer', law centratton curves used expresied In term8 of absorbance per 100% of constituent.
