A General Technique for Collecting Gas Chromatographic Fractions for Introduction into the Mass Spectrometer.

Amy, J. W.; Chait, E. M.; Baitinger, W. E.; McLafferty, Fred W.

doi:10.1021/ac60229a001

Cited by 49 publications

(15 citation statements)

References 9 publications

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“…Klirnes et a/ [!jl have evaluated recovery efficiencies thoroughly and found that these depend on gas flow, temperature of the coolant, trap design and boiling point of the substance collected. While trapping often involves the use of materials like glass wool [13], Preparative GC with Glass Capillaries adsorbents [14] or stationary phases [15], the aim in this study was to achieve maximum trapping efficiency without the use of foreign materials. Therefore, the traps were made up of several coils of glass capillary tubing, which had internal diameters similar to or somewhat larger than that of the glass capillary column employed.…”

Section: Trappingmentioning

confidence: 99%

Preparative gas chromatography with glass capillary columns

Roeraade¹,

Enzell²

1979

J. High Resol. Chromatogr.

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SummaryThe present paper describes an automated system for preparative gas chromatography with glass capillary columns, controlled by a microprocessor. The effluent from the capillary column is divided by a pneumatically controlled splitter and any desired split ratio between traps and detector can be obtained. Moreover, a second pneumatic control allows instantaneous change-over to a different split ratio, thus minimizing loss of material during collection.The effluent containing the compounds of interest is passed through a multiple manifold and collected in coiled glass capillary traps. To ensure maximum trapping efficiency even for very small amounts of material, the inner walls of the capillary traps are wetted with a suitable solvent, which gives a quantitative recovery of micro-and nanogram amounts of material.After repetitive sampling, sufficient amounts of material can be obtained for NMR spectroscopy and possibilities exist to enrich tracecomponentswith theaidof adoublecolumnsystem. Two examples of such applications are given, employing mixtures of both synthetic and natural origin.

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Section: Trappingmentioning

confidence: 99%

Preparative gas chromatography with glass capillary columns

Roeraade¹,

Enzell²

1979

J. High Resol. Chromatogr.

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“…In addition to gas chromatography, collection devices utilizing thinlayer chromatographic separations have also been reported. AMY et al (1965) have described a fraction collection method involving condensation of gas chromatographic effluent components onto column packing material contained in a glass melting point capillary tube. If the same packing material contained in the column is used, the capillary can be considered to be an extension of the gas chromatographic column, from which the appropriate portion of the sample is removed when it contains the desired component.…”

Section: B) Collection Devicesmentioning

confidence: 99%

Residue Reviews

1971

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“…More recently, CARLSON et al [142] presented both high and low resolution mass spectral data to support the conclusion of sterane-type structures in petroleum. The first report on the isolation and mass spectral identification of individual compounds of this class was made by BURLINGAME and collaborators [143], who isolated the C 27 , C 28 The mass spectra of the three tetracyclic hydrocarbons shown in Fig. 26 permitted the structural assignment of cholestane (XII) to the compound of Fig.…”

Section: Steranes and Triterpanesmentioning

confidence: 99%

“…The desorption process from the sieve in the source chamber is sufficiently slow to permit the determination of mass spectra. Since it has been suggested [28] that liquid phase coated solid support (g.!. c. packing) may be used for efficient g.!.…”

Section: B Sample Handling and Introduction Systemsmentioning

confidence: 99%