Abstract:topic mixtures as test liquids, and indicated that preliminary experiments had been successful.Hawkins suggested a mixture of ethylbenzene and chlorobenzene as an ideal test mixture for columns with up to 80 plates, and also for tests a t both atmospheric and subatmospheric pressures.Its relative volatility ranges from 1.10 a t 760 mm. to about 1.12 at 20 mm. of mercury pressure. The use of an n-heptanemethylcyclohexane mixture a t reduced pressures was also suggested.F. E . Williams of Hercules Powder Go. poi… Show more
“…3,4,8,9 Further data are given here to show that two atoms of fluorine in an organic compound give results nearly equivalent to one atom of oxygen. However, the results are not sufficiently reproducible to correct for fluorine found by analysis.…”
“…3,4,8,9 Further data are given here to show that two atoms of fluorine in an organic compound give results nearly equivalent to one atom of oxygen. However, the results are not sufficiently reproducible to correct for fluorine found by analysis.…”
“…This work will be reported in the near future. it is possible to determine the cxygen- 1 8 content of many organic compounds without the need for chemical conversions and with a precision sufficient for most tracer and isotope-effect experiments, provided the tracer enrichment is about 5%.…”
mentioning
confidence: 99%
“…suggested for analysis of isotopic composition of the oxygen in organic compounds, most involve the construction of relatively complex apparatus and none appears to be general and completely satisfactory (19). Doer-ing and Dorfman (6) adapted the Unterzaucher procedure for quantitative oxygen analysis (21,1,10) to the determination of oxygen-18 content and reported good results with a variety of compounds.…”
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