Separation of Isomeric Toluidines by Gas Liquid Partition Chromatography Using Ucon Oil as Stationary Phase.

Parsons, James S.; Morath, J. C.

doi:10.1021/ac60207a003

Cited by 8 publications

(2 citation statements)

References 1 publication

(1 reference statement)

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“…GLC resolution of the related disubstituted benzenes have been reported: ortho-, meta-, and /wa-chloroanilines (1) and methylanilines (2). However, these separations have been difficult and involved long retention times (ca.…”

mentioning

confidence: 99%

Gas-liquid chromatographic separation of the ten geometric isomers of chloromethylaniline using Ucon oil as stationary phase on a textured glass bead support

Townley¹,

Perez²,

Kabasakalian³

1970

Anal. Chem.

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mentioning

confidence: 99%

Gas-liquid chromatographic separation of the ten geometric isomers of chloromethylaniline using Ucon oil as stationary phase on a textured glass bead support

Townley¹,

Perez²,

Kabasakalian³

1970

Anal. Chem.

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“…Morrissette and Link (2) illustrate the favorable attributes of the TFA derivatives to the GC of fatty amines. Parsons and Morath (3) were able to resolve the three isomeric toluidines using a Ucon oil on a NaOH-treated support. F&M Scientific Division (4) reports the separation of the isomeric xylidines on a Carbowax-KOH column.…”

mentioning

confidence: 99%

Separation and determination of aniline and the toluidine, xylidine, ethylaniline, and N-methyltoluidine isomers by gas chromatography of their N-trifluoroacetyl derivatives

Dove¹

1967

Anal. Chem.

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; CF4-(C2F6); PF3-PF5-(NF3); SFe-(S2F10); Xe-PF3-PF5-(POF3). Because of the proximity of appearance temperatures, the detection of SF4 in the presence of SFs was limited to approximately 1 part in 100. The component gases of a mixture can be identified by determination of the appearance temperature of the individual gases-i.e., by calibration of the column-or by trapping out the components after they pass through the detector and analyzing them by infrared scan or other analytical means.The empirical nature of the method makes it difficult to correlate exactly the appearance temperature with other variables such as temperature gradient, rate of warming, flow rate of helium, and length and geometry of the separation column. Also, the separations become increasingly difficult as the gap between appearance temperature narrows.Hence, no attempt was made to fix appearance temperatures more precisely than to the nearest five degrees. The vapor pressure of the substances at their respective appearance temperatures, except those appearing at -195°and -175°C , are below 1 mm and no meaningful volatility correlation can be made.However, the order of the appearance temperatures generally conforms with that of the respective boiling points. Although the appearance temperatures have no absolute meaning, it was found that their relative order, as listed above, remained unchanged even when other variables were changed by as much as a factor or two. Further evidence of this unchanging relative order is the close agreement of the appearance temperature differentials for the two gases, CF4 and C02, common to this work and that of Cady and Siegwarth (7); despite the marked dissimilarities (geometry of equipment, warm-up rate, etc.) of the two studies, these differentials were 35°C and 39°C , respectively. ACKNOWLEDGMENTThe author thanks Murray Barsky and Milton Ader for their cooperation and helpful discussions.

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Signeur¹

1967

Guide to Gas Chromatography Literature

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Separation of Isomeric Toluidines by Gas Liquid Partition Chromatography Using Ucon Oil as Stationary Phase.

Cited by 8 publications

References 1 publication

Gas-liquid chromatographic separation of the ten geometric isomers of chloromethylaniline using Ucon oil as stationary phase on a textured glass bead support

Gas-liquid chromatographic separation of the ten geometric isomers of chloromethylaniline using Ucon oil as stationary phase on a textured glass bead support

Separation and determination of aniline and the toluidine, xylidine, ethylaniline, and N-methyltoluidine isomers by gas chromatography of their N-trifluoroacetyl derivatives

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