PMID- 11210231
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20010308
LR  - 20191025
IS  - 0937-0633 (Print)
IS  - 0937-0633 (Linking)
VI  - 369
IP  - 1
DP  - 2001 Jan 1
TI  - Automated solid phase dynamic extraction--extraction of organics using a wall 
      coated syringe needle.
PG  - 57-62
AB  - Extractions of liquid samples were carried out using wall coated needles prepared 
      from stainless steel capillary columns instead of syringe needles. This micro 
      extraction technique was applied to the analysis of pesticides in water. 
      Important parameters influencing the extraction such as sample velocity, 
      extraction time and also the desorption parameters were investigated and 
      optimized. Automation of this technique was realized using a conventional 
      automatic sampler. Limits of detection were improved using the multiple 
      extraction/desorption technique. Chromatographic data and limits of detection 
      were compared with those obtained by solid phase micro extraction (SPME). Using a 
      needle with a 7 microns film yielded limits of detection varying from 0.001-0.1 
      microgram/L and were in the same range as those resulting from the extraction 
      using a 100 microns polydimethylsiloxane (PDMS) SPME fiber. The main advantages 
      of the needle extraction technique were the significantly higher extraction speed 
      and the practical aspects of a stable steel needle compared to those of a fragile 
      fiber. The extraction speed using a needle with a 7 microns film was up to five 
      times higher than the speed of SPME using a 100 microns PDMS fiber. The steel 
      needle could be stressed mechanically in a higher extent than a SPME fiber. 
      Sample volumes and aliquots of liquid media could be handled and moved from one 
      bottle to another using the automatic sampler.
FAU - Lipinski, J
AU  - Lipinski J
AD  - SOFIA GmbH, Rudower Chaussee 29, 12489 Berlin, Germany. 
      JLipinski@sofia.fta-berlin.de
LA  - eng
PT  - Journal Article
PL  - Germany
TA  - Fresenius J Anal Chem
JT  - Fresenius' journal of analytical chemistry
JID - 9114077
EDAT- 2001/02/24 12:00
MHDA- 2001/02/24 12:01
CRDT- 2001/02/24 12:00
PHST- 2001/02/24 12:00 [pubmed]
PHST- 2001/02/24 12:01 [medline]
PHST- 2001/02/24 12:00 [entrez]
AID - 10.1007/s002160000618 [doi]
PST - ppublish
SO  - Fresenius J Anal Chem. 2001 Jan 1;369(1):57-62. doi: 10.1007/s002160000618.