Document Detail


Quantification of iprodione in dry basil using silica gel supported titanium dioxide.
MedLine Citation:
PMID:  20000573     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Iprodione is an agricultural fungicide that is difficult to detect in foods by HPLC because it coelutes with natural compounds in the food. We previously showed that food matrix could be degraded with titanium dioxide powder (TP). Here we describe an improved method for detection of iprodione using silica gel supported titanium dioxide (SGT). To synthesize SGT, titania-sol was mixed with diethanolamine, 2-propanol, and titanium tetraisopropoxide. After titania-sol was infiltrated into the silica gel (particle diameter 4 mm), the mixture was dried and then heated. Crude basil extract containing iprodione was mixed with SGT in a quartz vial, and the vial was irradiated with a UV light to selectively decompose the matrix interfering with the iprodione determination. In HPLC chromatograms of the treated solution, the interference peak decreased 35 times faster with SGT than with TP. When SGT (11 g) was added to the extract (20 mL) of dry basil (2 g), black light irradiation for 30 min was enough to quantify iprodione. The recovery rate of iprodione was 99.1%. Thus, the photocatalytic cleanup method using SGT is effective for analyzing residual iprodione in dry basil.
Authors:
Osamu Maeda; Chie Oikawa; Kentaro Noguchi; Nobuo Shiomi; Akira Toriba; Kazuichi Hayakawa
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  58     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-03     Completed Date:  2010-04-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1416-9     Citation Subset:  IM    
Affiliation:
House Food Analytical Laboratory Inc, 1-4 Takanodai, Yotsukaido, Chiba 284-0033, Japan. osamu-maeda@food-analab.co.jp
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MeSH Terms
Descriptor/Qualifier:
Aminoimidazole Carboxamide / analogs & derivatives*,  analysis
Chromatography, High Pressure Liquid / instrumentation,  methods*
Fungicides, Industrial / analysis*
Hydantoins / analysis*
Ocimum basilicum / chemistry*
Titanium / chemistry*
Chemical
Reg. No./Substance:
0/Fungicides, Industrial; 0/Hydantoins; 13463-67-7/titanium dioxide; 360-97-4/Aminoimidazole Carboxamide; 36734-19-7/iprodione; 7440-32-6/Titanium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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