Infrared Spectrophotometric Study of Veratrum Alkaloids - Analytical

Methods for the Determination of Protoveratrine. Ernest W. Grant , Edward E. Kennedy. Journal of the American Pharmaceutical Association (Scientific e...
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ANALYTICAL CHEMISTRY

1918 Table VIII.

Deviations in Analysis of Synthetic Blends

(Weight per cent, total sample basis) Synthetic N o . 1423 Synthetic No. 1355 Deviations Deviations in analyses in analysis Compound Synthesis Ai A2 Synthesis A 0.00 .,. 4.6 +0.2 Benzene 2.04 -0.11 +0.08 14.2 -0.3 Toluene 19.86 +0.72 Ethylbenzene +0.38 +0.4 20.1 15.76 - 0 09 p-Xylene +0.07 19.7 -0.3 42.84 -0.24 -0.30 m-Xylene 31.7 +O.l 19.39 -0.17 -0.12 o-Xylene 9.6 0.0 0.11 , . . ... 0.1 ... Other __ __ 100.00 100.0 Total Total before normalizing 98 0 97 2 103 4

Table IX.

Analyses of C? to CS Aromatic Fraction

Compound 0 3 0.3 0 0 Toluene 0 2 Ethylbenzene -0 2 0.0 0 1 p-Xylene 0 0 0.1 0.3 m-Xylene 0.6 +0 3 0.4 +Xylene 0.8 +0 4 0.4 1.0 Isor-benzene +O 6 4 0 5.4 -1 4 na-benzene 19.9 20.1 m-Ethyltoluene +0 2 9.2 p-Ethyltoluene 9.7 +o 5 8 9 1,3,5-Trimethylbenzene 9 0 +0 1 8.5 -0 8 7.7 o-Ethyltoluene 33.6 33 7 1 2 4-Trimethylbenzene 7.3 1:2:3-Trimethylbensene 6.7 1.2 2.0 Hydrindene +0 8 95.7'" 95.7a Total aromatics Total analytical man-hoursb 100 8 a Totals from each analysis normalized to values determined by acid extraction. b Inclu