Determination of Sulfur-Containing Polycyclic Aromatic Compounds in Coal Extracts using Capillary Column Gas Chromatography with Radio Frequency Plasma Detection

Chang, Huey-Ching K.; Skelton, R. J.; Markides, Karin E.; Lee, Milton L.

doi:10.1080/10406639008034767

Cited by 6 publications

(1 citation statement)

References 28 publications

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“…Microwaves have frequently been applied to sustain small helium plasmas, but the energy coupling is relatively complicated and requires the use of special cavities. Therefore, in the present work, a 350 kHz helium plasma was utilized due to the straightforward energy coupling and because of the excellent analytical properties, as demonstrated for gas chromatographic detection. − To enhance the sensitivity of the method, the extraction solvent was evaporated prior to analysis. The solid sample was subsequently introduced at the plasma inlet by a sample probe.…”

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confidence: 99%

Determination of Extractable Organic Chlorine and Bromine by Probe Injection Dual-Microplasma Atomic Emission Spectrometry

1997

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A probe injection dual-microplasma spectrometer is evaluated as a low-cost alternative for the determination of extractable organic chlorine and bromine (EOCl and EOBr). The system consists of two 350 kHz plasmas sustained in the same stream of helium and a probe for sample application in the interplasma region. The sample was applied with a microsyringe into a small cup on the sample probe. Subsequently, the extraction solvent was gently evaporated, and the sample cup was pushed into the interplasma region. The first plasma was in direct contact with the sample probe and served to rapidly vaporize the sample material. The vaporized sample was then transferred to the second plasma, where atomic emission was measured for the determination of EOCl and EOBr. For both Cl and Br, 120 pg detection limits and 1000:1 halogen-to-carbon selectivities were obtained, and responses were linear over 3 orders of magnitude.

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