TY - JOUR
T1 - Capillary gas chromatography coupled with microplasma mass spectrometry - Improved ion source design compatible with bench-top mass spectrometric instrumentation
AU - Brede, Cato
AU - Lundanes, Elsa
AU - Greibrokk, Tyge
AU - Pedersen-Bjergaard, Stig
PY - 1998/1/1
Y1 - 1998/1/1
N2 - Capillary gas chromatography was performed with mass spectrometric detection using a novel microplasma ion source for operation in an element- selective mode. The ion source was a 350 kHz radio frequency helium plasma, which was sustained inside the 4 cm end of a 0.32 mm i.d. fused silica capillary column, and located inside the high vacuum chamber of the quadrupole mass spectrometer. Due to the low volume of the ion source, a stable low pressure discharge was produced utilizing only the 2.25 mL min- 1 of GC carrier gas (helium) for plasma support. Small amounts of oxygen (0.1-0.2% v/v) were added to the plasma gas in order to prevent carbon deposits and to enhance signal-to-noise ratios. Chlorine and bromine were selectively detected at the 5-20 pg s-1 level (S/N = 2), and both produced a response that was linear within 3 orders of magnitude.
AB - Capillary gas chromatography was performed with mass spectrometric detection using a novel microplasma ion source for operation in an element- selective mode. The ion source was a 350 kHz radio frequency helium plasma, which was sustained inside the 4 cm end of a 0.32 mm i.d. fused silica capillary column, and located inside the high vacuum chamber of the quadrupole mass spectrometer. Due to the low volume of the ion source, a stable low pressure discharge was produced utilizing only the 2.25 mL min- 1 of GC carrier gas (helium) for plasma support. Small amounts of oxygen (0.1-0.2% v/v) were added to the plasma gas in order to prevent carbon deposits and to enhance signal-to-noise ratios. Chlorine and bromine were selectively detected at the 5-20 pg s-1 level (S/N = 2), and both produced a response that was linear within 3 orders of magnitude.
KW - Capillary gas chromatography
KW - Element-selective detection
KW - Microplasma mass spectrometry
KW - Radio frequency plasma
UR - http://www.scopus.com/inward/record.url?scp=0031662244&partnerID=8YFLogxK
U2 - 10.1002/(SICI)1521-4168(19980501)21:5<282::AID-JHRC282>3.0.CO;2-J
DO - 10.1002/(SICI)1521-4168(19980501)21:5<282::AID-JHRC282>3.0.CO;2-J
M3 - Journal article
AN - SCOPUS:0031662244
SN - 0935-6304
VL - 21
SP - 282
EP - 286
JO - HRC Journal of High Resolution Chromatography
JF - HRC Journal of High Resolution Chromatography
IS - 5
ER -