Rapid scan infrared spectrometer for operation with support coated open tubular or packed column gas chromatographs

Brown, Ralph Andreas.; Kelliher, James M.; Heigl, John J.; Warren, Charles W.

doi:10.1021/ac60298a012

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…There is general agreement by reviewers [63, 267, 300-3021 that the present limitations of the technique are due to insufficient detector sensitivity and source strength, which severely restrict the necessary scan rates required to produce spectra from rapidly eluting GC fractions. A GC-IR system has recently appeared however, in which a more sensitive cryogenic detector has been incorporated [302]. Levinstein has reviewed recently developed IR detectors [303).…”

Section: -mentioning

confidence: 99%

Spectroscopic Methods of Identification of Microquantities of Organic Materials

Ayling¹

1974

Applied Spectroscopy Reviews

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Section: -mentioning

confidence: 99%

Spectroscopic Methods of Identification of Microquantities of Organic Materials

Ayling¹

1974

Applied Spectroscopy Reviews

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“…The direct coupling of a fast-scanning fluorescence spectrometer to a gas chromatograph has permitted fluorometric detection and characterization of effluents in the outflow stream. Typical detection limits are 1 X -11 gram/sec for anthracene, 5 X 10~lz gram/ sector pyrene, and 2 -11 gram/sec for naphthalene. Fluorescence emission and excitation spectra which are sufficiently structured for use in identification have been obtained with as little as 10 ng of sample.…”

Section: Rotation Into Significant Parametersmentioning

confidence: 99%

“…In a study of retention indices of 30 nonpolar and polar solutes measured on 23 stationary phases, Rohrschneider reported that five assumed values in the statistical analysis were sufficient to reproduce the experimental data. McReynolds (2), using regression analysis on a 68-solute by 25-solvent problem, found that seven assumed values were required to span this larger matrix of data. The formalism employed by both investigators has done much to quantify our understanding of the number of controlling factors operative in gas chromatography.…”

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confidence: 99%

Factor analysis of some chemical and physical influences in gas-liquid chromatography

Weiner¹,

Howery²

1972

Anal. Chem.

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Some fundamental factors influencing retention indices in gas-liquid chromato raphy are studied by the mathematical technique offactor analysis. Eight abstract eigenvectors are required to span the factor space and to reproduce the data matrix within experimental error. A scaling-test vector termed the uniqueness test is used to compare compounds in the scheme. A procedure is presented for accurately predicting a solute retention index on any stationary phase in the system if the retention indices of that solute on eight carefully chosen stationary phases are known. The procedure can also be used to predict retention indices of any solute in the system on a given stationary phase if the retention indices of eight chosen solutes on that column are known. The usefulness of this procedure for predicting retention indices is illustrated for four solutes which were purposely left out of the analysis. Using the rotation part of the factor analysis, the following solute physical parameters tested successfully as factors of the space: molar polarization and dipole moment squared.A solvent property which tested successfully was the uniqueness of etherlike linkages.

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“…Such studies as have been reported have mostly been concerned with specially constructed fast scanning spectrometers, in order to adapt the spectrometric conditions to meet the operating requirements of gas chromatography columns. Instruments of this type have been described by Bartz and Ruhl (7) and Brown, Kelliher, Heigl, and Warren (8) and a rather simpler system, involving relatively minor alterations to a commercial instrument, by Wilks and Brown (9). Two commercial fast scanning spectrometers designed specifically for GC/vapor phase IR work have been marketed, but their overall performance characteristics, particularly the resolution, leave a good deal to be desired.…”

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confidence: 99%