PMID- 18656664
OWN - NLM
STAT- MEDLINE
DCOM- 20081118
LR  - 20221207
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 76
IP  - 4
DP  - 2008 Aug 15
TI  - Determination of photoirradiated high polar benzoylureas in tomato by HPLC with 
      luminol chemiluminescence detection.
PG  - 815-23
LID - 10.1016/j.talanta.2008.04.052 [doi]
AB  - This study reports the first analytical application of luminol chemiluminescence 
      reaction for the sensitive detection of two benzoylurea insecticides 
      (diflubenzuron and triflumuron). Off-line experiments demonstrated that 
      previously irradiated traces of these benzoylurea insecticides largely enhanced 
      the chemiluminescence emission yielded from the oxidation of luminol in 
      methanol:water mixtures, by potassium permanganate in alkaline medium, the 
      enhancement being proportional to the concentration of both pesticides. The two 
      benzoylureas were determined in tomato samples by coupling liquid chromatography 
      with post-column photoderivatization and detection based on this 
      chemiluminescence reaction. Tomato samples were extracted using the QuEChERS 
      method based on extraction with acetonitrile and dispersive solid-phase clean-up 
      using primary and secondary amine (PSA). Interferences due to matrix effect were 
      overcome by using matrix-matched standards. The optimised method was validated 
      with respect to linearity, limits of detection and quantification, precision and 
      accuracy. Under the optimised conditions, calibrations graphs were linear between 
      0.05 and 0.50 microg mL(-1) for diflubenzuron and between 0.10 and 1.00 microg 
      mL(-1) for triflumuron. Method detection limits were 0.0025 and 0.0131 microg 
      mL(-1) (equivalent to 0.0005 and 0.0026 mg kg(-1)) and quantification limits were 
      0.05 and 0.10 microg mL(-1) (equivalent to 0.01 and 0.02 mg kg(-1)) for 
      diflubenzuron and triflumuron, respectively. In both cases, quantification limits 
      were lower than the maximum residue levels (MRLs) established by the European 
      legislation. The relative standard deviation of intra-day precision was below 10% 
      and recoveries were between 79.7% and 94.2% for both pesticides.
FAU - Galera, M Martinez
AU  - Galera MM
AD  - Department of Analytical Chemistry, Faculty of Experimental Sciences, University 
      of Almeria, 04061 Almeria, Spain.
FAU - Garcia, M D Gil
AU  - Garcia MD
FAU - Valverde, R Santiago
AU  - Valverde RS
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080502
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Amines)
RN  - 0 (Benzamides)
RN  - 0 (Insecticides)
RN  - 00OT1QX5U4 (Potassium Permanganate)
RN  - 3FT64DYG8K (triflumuron)
RN  - 5EXP385Q4F (Luminol)
RN  - J76U6ZSI8D (Diflubenzuron)
SB  - IM
MH  - Amines/analysis
MH  - Benzamides/*analysis
MH  - Chemistry Techniques, Analytical/*methods
MH  - Chromatography, High Pressure Liquid/*methods
MH  - Diflubenzuron/*analysis
MH  - Insecticides/*analysis
MH  - Kinetics
MH  - Light
MH  - *Luminescence
MH  - *Luminescent Measurements
MH  - Luminol/*analysis/*chemistry
MH  - Solanum lycopersicum/*metabolism
MH  - Photochemistry/methods
MH  - Potassium Permanganate/analysis
EDAT- 2008/07/29 09:00
MHDA- 2008/11/19 09:00
CRDT- 2008/07/29 09:00
PHST- 2007/11/19 00:00 [received]
PHST- 2008/04/08 00:00 [revised]
PHST- 2008/04/16 00:00 [accepted]
PHST- 2008/07/29 09:00 [pubmed]
PHST- 2008/11/19 09:00 [medline]
PHST- 2008/07/29 09:00 [entrez]
AID - S0039-9140(08)00307-X [pii]
AID - 10.1016/j.talanta.2008.04.052 [doi]
PST - ppublish
SO  - Talanta. 2008 Aug 15;76(4):815-23. doi: 10.1016/j.talanta.2008.04.052. Epub 2008 
      May 2.