Coupling of High Speed Plasma Chromatography With Gas Chromatography

Cram, Stuart P.; Chesler, S. N.

doi:10.1093/chromsci/11.8.391

Cited by 28 publications

(13 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some experimental studies on the response of the gas density balance as a function of the nature of the carrier gas have been reported. In particular, hydrogen (16), helium (16, 1 7 ) , nitrogen (12,13,16,17), argon (12, 13, 1 7 ) , carbon dioxide (12,13,16), chloromethane ( 1 6 ) , difluoroethane ( 1 3 ) , dichlorofluoromethane (13, 1 6 ) , sulfur hexafluoride (14, 16, 171, bromotrifluoromethane (16), and octafluorocyclobutane (13) have been investigated. In one study (171, the optimum molecular weight ranges of operation were explicitly reported to be 10-50 for helium, 40-125 for nitrogen, and 50-130 and 160-300 for sulfur hexafluoride.…”

Section: Substitution Of Equation 68 Into Equation 66 Results Inmentioning

confidence: 99%

“…Despite the fact that the gas density balance was one of the first gas chromatographic detectors designed, search of the literature (1)(2)(3)(4)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) showed that a formal treatment of its hydrodynamics of operation was lacking. Such an analysis was recently developed (7) and is now presented below.…”

Section: Gas Density Balance a Formal Analysis Of The Hydrodynamics Omentioning

confidence: 99%

See 1 more Smart Citation

Gas density balance and the mass chromatograph

Kiran¹,

Gillham²

1975

Anal. Chem.

View full text Add to dashboard Cite

a straight line for an initial Gaussian distribution, and any deviations from straight-line behavior would give information on the initial pulse shape. CONCLUSIONSPlasma chromatography has been used largely as a simple detection or characterization tool, but the existence of a highly-developed kinetic theory of ion mobility and diffusion should make it capable of greater scope. Much useful information can be gained by the systematic variation of operating parameters much as temperature, gas pressure, and electric field, the use of various drift gases or gas mixtures, and the study of pulse widths and shapes. Further advances can be expected in the correlation of diffusion cross-sections with molecular structure. ACKNOWLEDGMENTThe authors thank T. H. Vu for his help with many of the calculations, and D. I. Carroll for his many helpful comments.A theoretical development is presented to show the hydrodynamics of operation of the gas density balance (a gas chromatographic detector that is currently being used in the mass chromatograph). Theoretical aspects of the mass chromatograph and a formal derivation of its operational relationships are also presented and discussed.I Present address, SEKA, C e n t r a l Research L a b o r a t o r y , I z m i t , T u r k e y .The gas density balance was first introduced in 1956 ( I ) . Its design was motivated by a desire to develop a gas chromatographic detector where response would be independent of the chemical structure of the substance being analyzed. The detector can be used for determination of molecular weights (2, 3 ) and in a modified form ( 4 ) , which has become known as the Gow-Mac gas density balance ( 5 ) , it is currently being used in the mass chromatograph (6).

show abstract

Section: Substitution Of Equation 68 Into Equation 66 Results Inmentioning

confidence: 99%

Section: Gas Density Balance a Formal Analysis Of The Hydrodynamics Omentioning

confidence: 99%

Gas density balance and the mass chromatograph

Kiran¹,

Gillham²

1975

Anal. Chem.

View full text Add to dashboard Cite

show abstract

“…log W = 1.1 log I + constant (7) In this expression W = weight in picograms and I = response in picoamps. As pointed out by Tou and Boggs, an unknown weight (W, ) may be obtained from its response (Iu) in the detector using a weight (W, ) and response (I , ) from the calibration graph according to the following equation.…”

Section: Selective Product Ion Monitoringmentioning

confidence: 99%

Halogenated compound response in an oxygen doped ion mobility detector for capillary gas chromatography

Baim

Hill

1983

J. High Resol. Chromatogr.

View full text Add to dashboard Cite

An ion mobility detector that has been specifically developed for interfacing with capillary gas chromatography is investigated in the negative ion mode. Like the electron capture detector, to which this instrument is closely related, the ion mobility detector shows an enhanced response to low molecular weight halogenated compounds when a small quantity of oxygen is doped into the make-up gas flow. Under 0 2 doping conditions, the device can operate in a reactant ion monitoring mode responding universally to compounds capable of capturing thermal electrons and in a tunable selective product ion mode providing increased selectivity over that achieved by the ECD. At an oxygen concentration of 0.5°/~, minimum detectable amounts as low as 600 femtograms have been realized for carbon tetrachloride. Selectivity of chloro-versus bromo-compounds is demonstrated using a mixture of p-dichlorobenzene and p-dibromobenzene.

show abstract

“…However, it is still very difficult to simultaneously analyze the constituents of a mixture with only IMS because of the mutual interferences from competitive ionization [17]. In order to improve the sensitivity and selectivity of IMS, it has been combined with other analytical technologies, such as GC [18,19], LC [20,21], and MS [22,23].…”

Section: Introductionmentioning

confidence: 99%

Detection of nitrobenzene compounds in surface water by ion mobility spectrometry coupled with molecularly imprinted polymers

Meng

et al. 2014

Journal of Hazardous Materials

View full text Add to dashboard Cite

Coupling of High Speed Plasma Chromatography With Gas Chromatography

Cited by 28 publications

References 0 publications

Gas density balance and the mass chromatograph

Gas density balance and the mass chromatograph

Halogenated compound response in an oxygen doped ion mobility detector for capillary gas chromatography

Detection of nitrobenzene compounds in surface water by ion mobility spectrometry coupled with molecularly imprinted polymers

Contact Info

Product

Resources

About