PMID- 16650850
OWN - NLM
STAT- MEDLINE
DCOM- 20060814
LR  - 20131121
IS  - 0021-9673 (Print)
IS  - 0021-9673 (Linking)
VI  - 1117
IP  - 1
DP  - 2006 Jun 2
TI  - Simultaneous determination of sorbic and benzoic acids in food dressing by 
      headspace solid-phase microextraction and gas chromatography.
PG  - 109-14
AB  - A facile headspace solid-phase microextraction (HS-SPME) procedure using 85 
      microm polyacrylate (PA) fiber is presented for the simultaneous determination of 
      preservatives (sorbic and benzoic acids) in food dressing, including Thousand 
      Island Dressing, HellMANN'S Salad Dressing and Tomato Ketchup, by gas 
      chromatography (GC) with flame ionization detector (FID). The method presented 
      preserves the advantages typical of HS-SPME such as simplicity, low intensity of 
      labor, low cost and solvent free. The main factors affecting the HS-SPME process, 
      such as extraction temperature and time, desorption temperature and time, the 
      acidity and salt concentration of the solution, were optimized. Limits of 
      detection (LODs) of the method were 2.00 microg/L for sorbic acid and 1.22 
      microg/L for benzoic acid. Relative standard deviations (RSDs) for quintuplicate 
      analyses at three concentration levels of 0.10, 2.0 and 20 mg/L ranged between 
      3.86 and 14.8%. The method also showed good linearity n a range from 0.02 to 40 
      mg/L with correlation coefficients (R2) of 0.9986 for sorbic acid and 0.9994 for 
      benzoic acid. Recoveries for the two analytes in all the samples tested ranged 
      from 83.44 to 113.2%. Practical applicability was demonstrated through the 
      simultaneous determination of sorbic and benzoic acids in the three complex 
      samples.
FAU - Dong, Chunzhou
AU  - Dong C
AD  - Department of sanitary technology, Hubei College of Traditional Chinese Medicine, 
      Wuhan 430064, China. dongchzh@163.com
FAU - Mei, Yong
AU  - Mei Y
FAU - Chen, Lin
AU  - Chen L
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20060502
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Benzoates)
RN  - X045WJ989B (Sorbic Acid)
SB  - IM
MH  - Benzoates/*analysis
MH  - Chromatography, Gas/*methods
MH  - *Food Analysis
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
MH  - Sorbic Acid/*analysis
MH  - Temperature
EDAT- 2006/05/03 09:00
MHDA- 2006/08/15 09:00
CRDT- 2006/05/03 09:00
PHST- 2006/02/07 00:00 [received]
PHST- 2006/04/02 00:00 [revised]
PHST- 2006/04/10 00:00 [accepted]
PHST- 2006/05/03 09:00 [pubmed]
PHST- 2006/08/15 09:00 [medline]
PHST- 2006/05/03 09:00 [entrez]
AID - S0021-9673(06)00823-5 [pii]
AID - 10.1016/j.chroma.2006.04.006 [doi]
PST - ppublish
SO  - J Chromatogr A. 2006 Jun 2;1117(1):109-14. doi: 10.1016/j.chroma.2006.04.006. 
      Epub 2006 May 2.