Improved Multiresidue Gas Chromatographic Determination of Organophosphorus, Organonitrogen, and Organohalogen Pesticides in Produce, Using Flame Photometric and Electrolytic Conductivity Detectors

Luke, Milton A.; Froberg, Jerry E.; Doose, Gregory M.; Masumoto, Herbert T

doi:10.1093/jaoac/64.5.1187

Cited by 83 publications

(47 citation statements)

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“…In the analytical method, extraction of residues was done with organic solvent, and further purification of the extract was done using column chromatography. Quantification of residues was carried out with gas chromatographs, Agilent 6890 and HP 5890, equipped with ECD and NPD detectors (Luke et al, 1975(Luke et al, , 1981Ambrus et al, 1981;Sadło, 1998).…”

Section: Methodsmentioning

confidence: 99%

Assessment of the Pesticide Residue Occurrence in Fruit from the South-Eastern Region of Poland During 2010-2011 Seasons

Słowik‐Borowiec

Szpyrka

Kurdziel

et al. 2012

Journal of Fruit and Ornamental Plant Research

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seasons, analyses of 171 samples of fresh fruit from the south-eastern region of Poland were performed. The research program included the determination of 137 (in 2010) to 152 (in 2011) active substances, together with their metabolites and decomposition products. The analytical methods used in the research were gas chromatography (GC/ECD/NPD) and spectrophotometry (to determine residues of dithiocarbamates). The results were compared with Poland's allowed maximum residue levels (MRLs).Residues of active plant protection product substances were detected in 85 samples (50%), while 7 (4%) samples had exceeded the MRLs.Violations of MRLs were mainly concerned with the following group of insecticides: cypermethrin (in black currant), esfenwalerate (in raspberry), and the fungicides: propiconazole, and difenoconazole (in gooseberries).

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Section: Methodsmentioning

confidence: 99%

Assessment of the Pesticide Residue Occurrence in Fruit from the South-Eastern Region of Poland During 2010-2011 Seasons

Słowik‐Borowiec

Szpyrka

Kurdziel

et al. 2012

Journal of Fruit and Ornamental Plant Research

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“…The organic fraction was evaporated to dryness, rinsed with HPLC grade methanol and filtered (0.2 µm) for direct HPLC analysis. (Luke, et al 1981).…”

Section: Residues Analysismentioning

confidence: 99%

Effect of Food Processing on Residues of Diniconazole, Etoxazole and Imidacloprid in Strawberry Fruits

2010

Journal of Productivity and Development

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Strawberry fruits were sprayed with imidacloprid, diniconazole and etoxazole at the recommended rates of application. The effect of processing on removal of tested pesticide residues from strawberry fruits were studied. According to their half-life (t1/2) values, strawberry fruits can be safely harvested for human consumption or for processing purposes 14 ,7 and 3 days after the spraying of imidacloprid, diniconazole and etoxazole , respectively . The removal ratio of imidacloprid, diniconazole and etoxazole residues in strawberries were in the range of 9.9-30.55%, 10.0-29.52% and 15.0 -46.67%, respectively, by washing with tap water .The average amount of imidacloprid, diniconazole and etoxazole residues in strawberry fruits, juice , syrup under cold and hot break were greatly decreased compared with those in unwashed strawberry fruits. Moreover, the amount of residues of the three tested pesticides was more greatly decreased in strawberries syrup under hot break than cold break.Pesticide residues were concentrated into jam and increased to higher levels than strawberry juice. A change in physical and chemical properties of strawberry fruits and products was related mainly to the processing operations.

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“…Fruits were incubated at 5˚C for 7 days and observed daily for Botrytis fruit rot development (Hongyin et al, 2007). Activities of pectinase (PC) and cellulase (CX) enzymes produced by B. cinerea in stored strawberry fruits were determined under laboratory conditions according to methods described by Talboys and Busch (1970) in fruit tissue extract prepared by Luke et al (1981) The reduction in viscosity of the reaction mixtures containing 2 ml of crude enzyme (tissue extract), 5ml, 1.5% citrus pectin solution in 0.1 M phosphate buffer at PH 5 adjusted by 0.3 M Na OH or HCl. The reaction mixtures were incubated at 28˚C and the loss in viscosity of the mixture was measured after 30 minutes against blank containing boiled inactivated extracts.…”

Section: Filed Experimentsmentioning

confidence: 99%

Potential of Certain Salts and Fungicides to Control Postharvest Gray Mould (B. cinerea) of Strawberry

El-Wahab

Seddik

razik

2019

Alexandria Journal of Agricultural Sciences

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Effect of two fungicides (i.e. iprodione and cyprodinil+flydioxonil mixture) and two salts (sodium bicarbonate, SBC, and sodium benzoate, SBO) were evaluated separately or in mixtures in laboratory experiments as well as under field conditions against Botrytis cinerea instant of the fruit gray mould of strawberry. All tested salts and fungicides as well as their mixtures significantly decreased the radial growth of B. cinerea in vitro. Complete inhibition of radial growth was obtained with SBC at 2.0 and1.0 g/100ml. Also, high reductions were obtained with SBC at lower concentrations. The fungicide iprodione at 500 mg/L completely inhibited radial growth of B. cinerea, while complete inhibition was obtained with cyprodinil+flydioxonil at lower concentration (10 mg/L). Mixing the tested fungicides with salts increased their inhibition effect on B. cinerea growth at lower fungicide concentrations. iprodione at 0.1 mg/L mixed with SBO at 1g/100ml completely inhibited radial growth. Also, cyprodinil+flydioxonil at 0.1mg/L mixed with SBC at 0.2 g/100ml completely inhibited radial growth of B. cinerea while 0.001mg/L cyprodinil+flydioxonil fungicide with SBO at 2.0g/100 completely inhibited radial growth. On the other hand, the field experiments showed that all treatments with the tested salts and fungicides significantly decreased postharvest Botrytis gray mould on fruits harvested 1, 3, 7, 10 and 15 days after treatments and stored at 5˚C for seven days. However, the treatment with 50% cyprodinil+flydioxonil + SBC 2% was the most effective and decreased mean percentage of infection to 4% compared to 23.86 % for the untreated control. This was followed by 50% iprodione +SBC 2%, 25% iprodione + SBC and 25% cyprodinil+flydioxonil + SBC 2%, and cyprodinil+flydioxonil, alone, and iprodione, alone, with percentages of infection being 7%, 8%, 8.5%, 8.5%, and 9%, respectively, while (SBC 2%, alone) treatment showed the least effect with 12.93 percentage of infection. Meanwhile, positive strong correlations (r = 0.981 to 0.943) were revealed between Infection (%) and harvest interval periods with two salts mixed with iprodione and cyprodinil + flydioxonil after stored at 5˚C. Also, the enzyme assay revealed that increases in the activity levels of pectolytic and cellulytic enzymes produced by the fungus were associated with high fruit rots incited by B. cinerea. Meanwhile, residues of all tested fungicides in treated strawberry fruits decreased with decreasing fungicide concentrations in the salt + fungicide mixtures. cyprodinil (25%) + SBO, and cyprodinil (25%) + SBC treatments exhibited the lowest residue values being 1.420, and 1.680 mg/kg fruit one hour after treatment while the other treatments showed higher residue values while the highest was recorded for iprodion at recommend dose being 29.81 mg/kg fruit. However, fungicide residues decreased with increasing time after preharvest treatments.

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Improved Multiresidue Gas Chromatographic Determination of Organophosphorus, Organonitrogen, and Organohalogen Pesticides in Produce, Using Flame Photometric and Electrolytic Conductivity Detectors

Cited by 83 publications

References 0 publications

Assessment of the Pesticide Residue Occurrence in Fruit from the South-Eastern Region of Poland During 2010-2011 Seasons

Assessment of the Pesticide Residue Occurrence in Fruit from the South-Eastern Region of Poland During 2010-2011 Seasons

Effect of Food Processing on Residues of Diniconazole, Etoxazole and Imidacloprid in Strawberry Fruits

Potential of Certain Salts and Fungicides to Control Postharvest Gray Mould (B. cinerea) of Strawberry

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