Tomatoes buprofezin

A Multi-residue analytical method (for plants) is used for rice, citrus and tomato. Buprofezin and p-OH-buprofezin (as the acetylated derivative, p-AcO-buprofezin) are analyzed simultaneously using gas chromatography/nitrogen-phosphorus detection (GC/NPD). 

Buprofezin and its metabolites, p-OH-buprofezin and BF12, are hydrophobic under neutral conditions. Having the organic base part in their chemical structure, these compounds form water-soluble salts under strongly acidic conditions. The change in solubilities of these compounds influences the cleanup procedure. Four different residue analytical methods have been developed to measure buprofezin and its metabolites in plants (rice, citrus and tomato cucumber, pepper, tomato, squash and eggplant), soil and water ... 

B Gas chromatography/mass spectrometry (GC/MS) method (for plants) is used to determine buprofezin in cucumber, pepper, tomato, squash and eggplant. ... 

With a fortification level of l-2mgkg recoveries of buprofezin from untreated hulled rice, rice straw, tomato, citrus flesh and citrus peel samples are 85, 97, 93, 87 and 75%, respectively. 

The limits of detection of buprofezin and /t-OH-buprofezin are 0.005 mg kg for hulled rice, tomato and citrus flesh and 0.01 mg kg for rice straw and citrus peel. 

With a fortification level of 0.20 mg kg recoveries of buprofezin from untreated pepper, tomato, squash and eggplant samples were 76,73,77 and 92%, respectively. The limit of quantification of buprofezin is 0.01 mg kg ... 

---