Gas chromatographic determination of benalaxyl residues in different crops and water.
A gas chromatographic method is described that is suitable for the determination of benalaxyl residues ranging from 10 to 0.1 micrograms/kg in several crops, must, wine, and water. The compound is extracted with acetone and purified either by partitioning between water and n-hexane or by passing the extract through an Extrelut column with n-hexane. Further purification is achieved by column chromatography on alumina. The active ingredient is finally determined by gas chromatography with nitrogen-phosphorus detection. Mean recoveries were > or = 95% in the various crops tested and in the 0.01-1.05 mg/kg fortification range. Standard deviations for each crop were < or = 6.5%.
Crisippi
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T
Isagro S.r.l., Enichem, Biochemical and Toxicological Department, Novara, Italy.
Zini
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G
Fabbrini
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R
D000409:Alanine / Q000031:analogs & derivatives* / Q000032:analysis / Q000302:isolation & purification; D002523:Edible Grain / Q000737:chemistry; D005504:Food Analysis; D005638:Fruit / Q000737:chemistry; D005659:Fungicides, Industrial / Q000032:analysis* / Q000302:isolation & purification; D007202:Indicators and Reagents; D010573:Pesticide Residues / Q000032:analysis* / Q000302:isolation & purification; D010947:Plants, Toxic; D012997:Solvents; D014026:Nicotiana / Q000737:chemistry; D014675:Vegetables / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply; D014920:Wine / Q000032:analysis
D005659:Fungicides, Industrial; D007202:Indicators and Reagents; D010573:Pesticide Residues; D012997:Solvents; D014874:Water Pollutants, Chemical; C052866:benalaxyl; D000409:Alanine