PMID- 15865181
OWN - NLM
STAT- MEDLINE
DCOM- 20050928
LR  - 20190720
IS  - 0021-9673 (Print)
IS  - 0021-9673 (Linking)
VI  - 1071
IP  - 1-2
DP  - 2005 Apr 15
TI  - Impact of phase ratio, polydimethylsiloxane volume and size, and sampling 
      temperature and time on headspace sorptive extraction recovery of some volatile 
      compounds in the essential oil field.
PG  - 111-8
AB  - This study evaluates concentration capability of headspace sorptive extraction 
      (HSSE) and the influence of sampling conditions on HSSE recovery of an analyte. A 
      standard mixture in water of six high-to-medium volatility analytes (isobutyl 
      methyl ketone, 3-hexanol, isoamyl acetate, 1,8-cineole, linalool and carvone) was 
      used to sample the headspace by HSSE with stir bars coated with different 
      polydimethylsiloxane (PDMS) volumes (20, 40, 55 and 110 microL, respectively), 
      headspace vial volumes (8, 21.2, 40, 250 and 1000 mL), sampling temperatures (25, 
      50 and 75 degrees C) and sampling times (30, 60 and 120 min, and 4, 8 and 16 h). 
      The concentration factors (CFs) of HSSE versus static headspace (S-HS) were also 
      determined. Analytes sampled by the PDMS stir bars were recovered by thermal 
      desorption (TDS) and analysed by capillary GC-MS. This study demonstrates how 
      analyte recovery depends on its physico-chemical characteristics and affinity for 
      PDMS (octanol-water partition coefficients), sampling temperatures (50 degrees C) 
      and times (60 min), the volumes of headspace (40 mL) and of PDMS (in particular, 
      for high volatility analytes). HSSE is also shown to be very effective for trace 
      analysis. The HSSE CFs calculated versus S-HS with a 1000 mL headspace volumes at 
      25 degrees C during 4 h sampling ranged between 10(3) and 10(4) times for all 
      analytes investigated while the limits of quantitation determined under the same 
      conditions were in the nmol/L range.
FAU - Bicchi, Carlo
AU  - Bicchi C
AD  - Dipartimento di Scienza e Tecnologia del Farmaco, Universita degli Studi di 
      Torino, Via Pietro Giuria 9, I-10125 Torino, Italy. carlo.bicchi@unito.it
FAU - Cordero, Chiara
AU  - Cordero C
FAU - Liberto, Erica
AU  - Liberto E
FAU - Rubiolo, Patrizia
AU  - Rubiolo P
FAU - Sgorbini, Barbara
AU  - Sgorbini B
FAU - Sandra, Pat
AU  - Sandra P
LA  - eng
PT  - Journal Article
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Dimethylpolysiloxanes)
RN  - 0 (Oils, Volatile)
RN  - 0 (Silicones)
RN  - 63148-62-9 (baysilon)
SB  - IM
MH  - Dimethylpolysiloxanes/*chemistry
MH  - Gas Chromatography-Mass Spectrometry/methods
MH  - Oils, Volatile/*chemistry
MH  - Sensitivity and Specificity
MH  - Silicones/*chemistry
MH  - Temperature
MH  - Volatilization
EDAT- 2005/05/04 09:00
MHDA- 2005/09/29 09:00
CRDT- 2005/05/04 09:00
PHST- 2005/05/04 09:00 [pubmed]
PHST- 2005/09/29 09:00 [medline]
PHST- 2005/05/04 09:00 [entrez]
AID - S0021-9673(04)01651-6 [pii]
AID - 10.1016/j.chroma.2004.09.054 [doi]
PST - ppublish
SO  - J Chromatogr A. 2005 Apr 15;1071(1-2):111-8. doi: 10.1016/j.chroma.2004.09.054.