Dissipation pattern of quinalphos in cauliflower, tomato and bean samples

Munia, Zerin Sultana; Shoeb, Mohammad; Mamun, M. I. R.; Nahar, Nilufar

doi:10.1007/s00003-017-1143-8

Cited by 4 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The degradation of a component is described by the rst order function (C t = C 0 x e kt ). The half-lives of the pesticides were obtained by the equation t ½ = ln2/k, where C t is the concentration (µg L 1 ) at time t (days) after application, C 0 is the initial concentration (µg L 1 ) and k is the rst order rate constant (day 1 ) [Munia et al 2018, Zhang et al 2012]. The dissipation of chlorpyrifos followed a pseudo rst-order kinetics pattern.…”

Section: Resultsmentioning

confidence: 99%

“…Pesticide residues in the agricultural products depend on the dose of application, climatic condition of each country and also on seasons like winter and summer [Nahar et al 2014]. We earlier reported dissipation pattern of fenvalerate in tea, and cypermethrin and quinalphos in tomato, bean, cauli ower in experimental elds [Nahar et al 2012, 2014, 2016, Munia 2018]. Now we are reporting dissipation of ve locally used pesticides namely Vitaban 48 EC, Double 50 EC, Nitro 505 EC, Asataf 75 SP (acephate) and Reeva 2.5 EC in eight commonly consumed vegetable samples i.e., tomato, cabbage, cauli ower, bottle gourd, sweet gourd, sponge gourd, green chili and cucumber at ambient temperature for environment and consumer safety.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dissipation Pattern of Five Pesticides in Vegetable Samples

Shoeb

Munia

Nahar

2021

Preprint

Self Cite

View full text Add to dashboard Cite

Pesticides are frequently used in agricultural fields in Bangladesh. Residual pesticides in vegetable samples above maximum residue limits (MRL) are illegal use of pesticides and absence of Good Agricultural Practice (GAP). The Government made Safe Food Law to ensure safe food for all citizens of the country. To assess the dissipation of pesticides in vegetable samples for consumer safety, five locally banded pesticides i.e., Vitaban (chlorpyrifos), Double (mixture of imidacloprid and cypermethrin), Nitro (mixture of chlorpyrifos and cypermethrin), Acephate and Reeva (lambda cyhalothrin) were applied to eight different vegetables at the dose which farmers apply in their field in a large vegetable cultivation area. Samples were harvested from the farmer’s fields at 2h (0 day) after application of pesticides and analyzed at 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 days keeping them at ambient temperature. Samples were extracted following Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) method and cleaned up using primary secondary amine (PSA), and finally analysed by Gas Chromatograph Electron Captured Detector (GC-ECD. Limit of detection (LOD) and limit of quantification (LOQ) of chlorpyrifos, cypermethrin, imidacloprid, acephate and lambda cyhalothrin were 0.019 and 0.057, 0.019 and 0.057, 0.009 and 0.027, 0.019 and 0.057, and 0.009 and 0.057 µg/mL, respectively. Recoveries of these pesticides in these vegetables samples were within acceptable range of 74–110%. Level below MRL value of cypermethrin was found to be 2–5 days while chlorpyrifos, imidacloprid, acephate and lambda cyhalothrin treated vegetables were varied 3–8 days and considered to consume after these days, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%