Proportional Counter Assay of Tritium in Gas Chromatographic Streams.

Lee, J. K.; Lee, E. K. C.; Musgrave, B.C.; ang, Yi-Noo; Root, John W.; Rowland, F. S.

doi:10.1021/ac60187a008

Cited by 81 publications

(29 citation statements)

References 8 publications

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“…The 85 ml counter has been described (8). The high voltage on the centerwire of the counter was maintained by a 5 kV power supply.…”

Section: Lbl-1249mentioning

confidence: 99%

“…This sample volume is swept onto the gas chromatographic column in about 100 sec, assuming typical radio-gas-chromatographic flow rates and pressure drops (8). In contrast, the typical residence time in the 85 ml internal proportional counter is only 60 sec (8).…”

Section: Introductionmentioning

confidence: 99%

“…However, the use of the counter does add one limitation, namely, 3) the flow rate through the counter must remain constant (8). The limitation of a constant flow rate through the counter is, in practice, a limitation to a constant flow rate for the helium carrier gas.…”

Section: Introductionmentioning

confidence: 99%

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Multicolumn radio-gas chromatographic analysis of recoil tritium reaction products

Fee¹,

Markowitz²

1973

Anal. Chem.

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At one end of the scale, interferometric spectrometers provide high sensitivity and scanning speed but are very expensive. Specialist spectrometry laboratories using conventional dispersion instruments with a range of accessories come in an intermediate position. This approach is typified by the work of Freeman (13) who, using an ultramicro cavity cell and a beam condenser, has obtained a good spectrum from 1 #tg of eugenol in solution in 1 µ\ of carbon tetrachloride. In this type of work, the unknown from the GC separation is condensed into a glass capillary and washed out into the ultramicro cell with the requisite small volume of solvent, and sensitivity is gained at the expense of sample handling time. It is also possible to trade spectrometer performance for scanning speed, for "on-the-fly" work, and this point is well covered by Freeman (13).The objective of the present work, as noted at the outset, has been to provide a simple system based, as far as possible, on the equipment to be found in a smaller spectrometry laboratory, for use by staff who do not specialize in infrared spectrometry. In these circumstances, ease of operation, particularly in the handling of small samples, is of primary importance, and this has led to the vapor phase approach. The sacrifice made in terms of sensitivity is not a serious one in practice; the ability to obtain useful spectra from 100-µg samples and 20^g samples in many instances has proved adequate for the great majority of the problems encountered.

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“…The 85 ml counter has been described (8). The high voltage on the centerwire of the counter was maintained by a 5 kV power supply.…”

Section: Lbl-1249mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multicolumn radio-gas chromatographic analysis of recoil tritium reaction products

Fee¹,

Markowitz²

1973

Anal. Chem.

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“…ITse of internal proportional flow counters for the high efficiency, practical assay of low energy beta-emitting radioisotopes has also been discussed in detail (6)(7)(8)(9). Since the widely used glass counters with silver cathodes are susceptible to chemical attack by some gaseous compounds--e.g., amines-lead-G .…”

Section: F Schmidt-bleek and F S Rowland Chemistry Department Unmentioning

confidence: 99%

New Design of an Internal Proportional Flow Counter for Radio-Gas Chromatography.

Schmidt-Bleek¹,

Rowland²

1964

Anal. Chem.

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“…Precise working conditions (plateau; counting and carrier gas ; resolving power; interferences) are reported for internally silvered glass counting tubes (volumes : 10,20, and 85 ml) fitted with a tungsten counting wire [26]. For y-rays, Herr et al [lo] used a continuous-flow counting tube provided with a capillary flow tube in its counting chamber, or a continuous-flow proportional counting tube made of stainless steel with teflon insulators and a tungsten counting wire of 0.05 mm diameter; the latter tube showed a back ground effect of 40 impulses/min at 210 "C [27].…”

Section: Geiger-muller and Proportional Counting Tubesmentioning

confidence: 99%

Modern Methods for the Separation and Continuous Measurement in the Gas Phase of Compounds Labelled with Radiocarbon. Radio and Reaction Gas Chromatography

Drawert¹,

Bachmann²

1963

Angew. Chem. Int. Ed. Engl.

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Proportional Counter Assay of Tritium in Gas Chromatographic Streams.

Cited by 81 publications

References 8 publications

Multicolumn radio-gas chromatographic analysis of recoil tritium reaction products

Multicolumn radio-gas chromatographic analysis of recoil tritium reaction products

New Design of an Internal Proportional Flow Counter for Radio-Gas Chromatography.

Modern Methods for the Separation and Continuous Measurement in the Gas Phase of Compounds Labelled with Radiocarbon. Radio and Reaction Gas Chromatography

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