Details
| Original language | English |
|---|---|
| Pages (from-to) | 148-155 |
| Number of pages | 8 |
| Journal | Chemical geology |
| Volume | 358 |
| Publication status | Published - 4 Nov 2013 |
Abstract
A new method for the analysis of trace gases from fluid inclusions of minerals has been developed. The purge and trap GC-MS system is based on the system described by Nolting et al. (1988) and was optimized for the analyses of halogenated volatile organic compounds (VOCs) having boiling points as low as -128. °C (carbon tetrafluoride).The sample preconcentration cold trap consists of a U-shaped glass lined steel tube (GLT™), that is immersed into a small liquid nitrogen Dewar vessel for cooling. A rapid desorption step heats up the preconcentration tube in <30s from -196°C to 200°C. The process is carried out by using a pressurized air stream to dissipate the liquid nitrogen followed by resistive heating of the trap. The design of the cold trap and the direct transfer of desorbed analytes onto the GC column via a deactivated capillary column retention gap made sample refocusing within the GC oven unnecessary. Furthermore, a special air-tight grinding device was developed in which samples ranging from soft halite (hardness 2, Mohs scale) to hard quartz (hardness 7) are effectively ground to average diameters of 1000nm or below, thereby releasing gases from fluid inclusions of minerals. The gases are then purged from the grinding chamber with a He carrier gas flow. The detection and quantitative determination of gases, such as SF6 and CF4 released from fluorites and CH3Cl from halite samples is demonstrated.
Keywords
- Carbon tetrafluoride, Dynamic headspace purge and trap technique, Fluid inclusions, Methyl chloride, Mineral grinding, Sulfur hexafluoride
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
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In: Chemical geology, Vol. 358, 04.11.2013, p. 148-155.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A new purge and trap headspace technique to analyze low volatile compounds from fluid inclusions of rocks and minerals
AU - Mulder, Ines
AU - Huber, Stefan G.
AU - Krause, Torsten
AU - Zetzsch, Cornelius
AU - Kotte, Karsten
AU - Dultz, Stefan
AU - Schöler, Heinz F.
N1 - Funding information: Thanks to Günther Schönlein, a private mineral collector from Bamberg, Germany, for generously providing us with minerals for testing and to Ronald Bakker at the University in Leoben for his fluid inclusion workshop. This work was supported by the DFG Research Unit 763 .
PY - 2013/11/4
Y1 - 2013/11/4
N2 - A new method for the analysis of trace gases from fluid inclusions of minerals has been developed. The purge and trap GC-MS system is based on the system described by Nolting et al. (1988) and was optimized for the analyses of halogenated volatile organic compounds (VOCs) having boiling points as low as -128. °C (carbon tetrafluoride).The sample preconcentration cold trap consists of a U-shaped glass lined steel tube (GLT™), that is immersed into a small liquid nitrogen Dewar vessel for cooling. A rapid desorption step heats up the preconcentration tube in <30s from -196°C to 200°C. The process is carried out by using a pressurized air stream to dissipate the liquid nitrogen followed by resistive heating of the trap. The design of the cold trap and the direct transfer of desorbed analytes onto the GC column via a deactivated capillary column retention gap made sample refocusing within the GC oven unnecessary. Furthermore, a special air-tight grinding device was developed in which samples ranging from soft halite (hardness 2, Mohs scale) to hard quartz (hardness 7) are effectively ground to average diameters of 1000nm or below, thereby releasing gases from fluid inclusions of minerals. The gases are then purged from the grinding chamber with a He carrier gas flow. The detection and quantitative determination of gases, such as SF6 and CF4 released from fluorites and CH3Cl from halite samples is demonstrated.
AB - A new method for the analysis of trace gases from fluid inclusions of minerals has been developed. The purge and trap GC-MS system is based on the system described by Nolting et al. (1988) and was optimized for the analyses of halogenated volatile organic compounds (VOCs) having boiling points as low as -128. °C (carbon tetrafluoride).The sample preconcentration cold trap consists of a U-shaped glass lined steel tube (GLT™), that is immersed into a small liquid nitrogen Dewar vessel for cooling. A rapid desorption step heats up the preconcentration tube in <30s from -196°C to 200°C. The process is carried out by using a pressurized air stream to dissipate the liquid nitrogen followed by resistive heating of the trap. The design of the cold trap and the direct transfer of desorbed analytes onto the GC column via a deactivated capillary column retention gap made sample refocusing within the GC oven unnecessary. Furthermore, a special air-tight grinding device was developed in which samples ranging from soft halite (hardness 2, Mohs scale) to hard quartz (hardness 7) are effectively ground to average diameters of 1000nm or below, thereby releasing gases from fluid inclusions of minerals. The gases are then purged from the grinding chamber with a He carrier gas flow. The detection and quantitative determination of gases, such as SF6 and CF4 released from fluorites and CH3Cl from halite samples is demonstrated.
KW - Carbon tetrafluoride
KW - Dynamic headspace purge and trap technique
KW - Fluid inclusions
KW - Methyl chloride
KW - Mineral grinding
KW - Sulfur hexafluoride
UR - http://www.scopus.com/inward/record.url?scp=84884924318&partnerID=8YFLogxK
U2 - 10.1016/j.chemgeo.2013.09.003
DO - 10.1016/j.chemgeo.2013.09.003
M3 - Article
AN - SCOPUS:84884924318
VL - 358
SP - 148
EP - 155
JO - Chemical geology
JF - Chemical geology
SN - 0009-2541
ER -