PMID- 15909524
OWN - NLM
STAT- MEDLINE
DCOM- 20050818
LR  - 20190720
IS  - 0021-9673 (Print)
IS  - 0021-9673 (Linking)
VI  - 1073
IP  - 1-2
DP  - 2005 May 6
TI  - Capillary electrophoresis for analyzing pesticides in fruits and vegetables using 
      solid-phase extraction and stir-bar sorptive extraction.
PG  - 229-36
AB  - Two procedures based on solid-phase extraction (SPE) and stir-bar sorptive 
      extraction (SBSE) in combination with micellar electrokinetic chromatography 
      (MEKC)--diode array detection (DAD) were compared for the simultaneous extraction 
      of acrinathrin, bitertanol, cyproconazole, fludioxonil, flutriafol, myclobutanil, 
      pyriproxyfen, and tebuconazole in lettuce, tomato, grape, and strawberry. 
      Selectivity and resolution of the MEKC procedure were studied changing the pH and 
      the molarity of the buffer, the type and the concentration of surfactant, and the 
      methanol content in the mobile phase. A buffer consisting of 6 mM sodium 
      tetraborate decahydrate with 75 mM of cholic acid sodium solution (pH 9.2) gave 
      the best results. Linearity, extraction efficiencies and limits of quantitation 
      (LOQs) of both extraction methods were compared. The recoveries obtained by SPE 
      ranged from 40 to 106% with relative standard deviations (R.S.D.s) from 10 to 19% 
      whereas by the SBSE method, the recoveries were 12-47% and the R.S.D.s 3-17%. The 
      LOQs were much better by SPE (0.2-0.5 mg kg(-1) depending on the processed sample 
      amount) than those obtained by SBSE (1 mg kg(-1) for each compound). Advantages 
      and disadvantages of both procedures are also discussed. As SPE is more robust, 
      rapid, and sensitive than SBSE, its application in combination with MEKC is 
      recommended because provided LOQs below the MRLs established, which is not always 
      attained by SBSE.
FAU - Juan-Garcia, Ana
AU  - Juan-Garcia A
AD  - Laboratori de Bromatologia i Toxicologia, Facultat de Farmacia, Universitat de 
      Valencia, Av. Vicent Andre Estelles s/n, 46100 Burjassot, Valencia, Spain.
FAU - Pico, Yolanda
AU  - Pico Y
FAU - Font, Guillermina
AU  - Font G
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Pesticides)
SB  - IM
MH  - Electrophoresis, Capillary/*methods
MH  - Fruit/*chemistry
MH  - Pesticides/*analysis
MH  - Sensitivity and Specificity
MH  - Vegetables/*chemistry
EDAT- 2005/05/25 09:00
MHDA- 2005/08/19 09:00
CRDT- 2005/05/25 09:00
PHST- 2005/05/25 09:00 [pubmed]
PHST- 2005/08/19 09:00 [medline]
PHST- 2005/05/25 09:00 [entrez]
AID - S0021-9673(04)01623-1 [pii]
AID - 10.1016/j.chroma.2004.09.028 [doi]
PST - ppublish
SO  - J Chromatogr A. 2005 May 6;1073(1-2):229-36. doi: 10.1016/j.chroma.2004.09.028.