PMID- 17998743
OWN - NLM
STAT- MEDLINE
DCOM- 20080215
LR  - 20190827
IS  - 0910-6340 (Print)
IS  - 0910-6340 (Linking)
VI  - 23
IP  - 11
DP  - 2007 Nov
TI  - Development and features of hydro-membrane gas chromatography.
PG  - 1267-74
AB  - Hydro-membrane gas chromatography (HMGC) is achieved by the annular condensation 
      of water in a capillary column at less than 70 degrees C. The annular membrane of 
      water is formed as a result of the wettability of the stationary phase, which is 
      induced at a water contact angle ranging from 75 degrees to 79 degrees, as 
      derived from a solubility parameter (delta) range of 15.7 +/- 0.3 MPa(1/2) of the 
      coated resin. The range of the liquid to gas volume ratio (beta) required to 
      support the annular membrane should be kept between 0.00005 and 0.0003. In the 
      case of a 0.25-mm i.d. column, the ratio can be set by the combination of a 0.1 
      to 0.2 microl min(-1) water supply rate and helium gas flow rate. Separation by 
      HMGC develops not only a gas-solid partition but also a focusing effect on the 
      water membrane. One feature of HMGC is that it gives a non-adsorption 
      chromatogram based on the blocking effect of pre-adsorbed water; furthermore, 
      despite the presence of a relatively large quantity of water, the electron impact 
      ionization efficiency is kept the same as in the usual GC/MS condition. The 
      detection limit with the injection of 1 microl of aquatic solution was estimated 
      to be less than 0.1 ppb of low-molecular-weight fatty acids with s/n = 5 on a 
      mass chromatogram at m/z 45. The HMGC/EI-MS system can be applied to the trace 
      analysis of C1 to C3 volatile acids, volatile inorganic acids, and halogenated 
      organic acids in water.
FAU - Tanikawa, Isao
AU  - Tanikawa I
AD  - Corporate Research & Development Toyo Seikan Group, 22-4 Okazawa, Hodogaya, 
      Yokohama, Japan. miwako_tanikawa@toyo-seikan.co.jp
FAU - Hirakawa, Nobuo
AU  - Hirakawa N
FAU - Hosono, Hiroko
AU  - Hosono H
FAU - Nakamura, Hiroshi
AU  - Nakamura H
LA  - eng
PT  - Journal Article
PL  - Switzerland
TA  - Anal Sci
JT  - Analytical sciences : the international journal of the Japan Society for 
      Analytical Chemistry
JID - 8511078
RN  - 0 (Acids)
RN  - 0 (Siloxanes)
RN  - 059QF0KO0R (Water)
SB  - IM
MH  - Acids/chemistry
MH  - Chromatography, Gas/*methods
MH  - Siloxanes/chemistry
MH  - Surface Tension
MH  - Time Factors
MH  - Water/*chemistry
EDAT- 2007/11/14 09:00
MHDA- 2008/02/19 09:00
CRDT- 2007/11/14 09:00
PHST- 2007/11/14 09:00 [pubmed]
PHST- 2008/02/19 09:00 [medline]
PHST- 2007/11/14 09:00 [entrez]
AID - JST.JSTAGE/analsci/23.1267 [pii]
AID - 10.2116/analsci.23.1267 [doi]
PST - ppublish
SO  - Anal Sci. 2007 Nov;23(11):1267-74. doi: 10.2116/analsci.23.1267.