A rapid spectrophotometric assay of some organophosphorus pesticide residues in vegetable samples

Mathew, Sunitha B.; Pillai, Ajai K.; Gupta, V. K.

doi:10.1016/j.saa.2006.11.020

Cited by 41 publications

(14 citation statements)

References 6 publications

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“…For this reason, the level of these compounds needs to be monitored priority so that appropriate measures can be taken. Many methods have been developed in the last few years for the determination of OPs, such as gas chromatography (GC) (Xiao et al 2006), highperformance liquid chromatography (HPLC) (Tomás et al 2005), ion mobility spectrometry (Mohammad 2006), spectrophotometric (Mathewa et al 2007) and biosensor (Lin et al 2006). Among them, GC and HPLC have become the classical methods that were widely used.…”

mentioning

confidence: 99%

Simultaneous Determination of Omethoate and Dichlorvos by Capillary Electrophoresis

Tao¹,

Wang²,

Lian-bin

et al. 2008

Bull Environ Contam Toxicol

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A capillary electrophoresis method has been developed for the analysis of omethoate and dichlorvos. Response surface methodology (RSM) was used to optimize the separate conditions for simultaneous detection of omethoate and dichlorvos. The results indicated that the optimal conditions for omethoate and dichlorvos determination were; pH 7.64, SDS concentration 67.5 mM, separation voltage 19.0 KV. Quantitative linear ranges were 1.0-300 microg/mL for omethoate and dichlorvos with correlation of 0.9967 and 0.9965, respectively. The limits of detection were 0.046 microg/mL and 0.031 microg/mL for omethoate and dichlorvos, with relative standard deviations (R.S.D.) <3.6%. The value of recoveries for omethoate and dichlorvos were arranged from 94.1% to 106.0%.

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mentioning

confidence: 99%

Simultaneous Determination of Omethoate and Dichlorvos by Capillary Electrophoresis

Tao¹,

Wang²,

Lian-bin

et al. 2008

Bull Environ Contam Toxicol

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“…R.E. increases with least value of 64.65% obtained with 25 mg and highest value of 95.04% with 500 mg of the biosorbent, this because at high dosage, there is an increase in surface area and availability of biosorption sites, but q e decreases as a decrease in the amount of Pb 2+ ions adsorbed per unit weight of biosorbent [2,[38][39][40]. These results are illustrated in Figure 8 and Table 3.…”

Section: Effect Of Biosorbent Dosagementioning

confidence: 82%

Removal of Toxic Pb(II) Ions from Aqueous Solution by Nano Sized Flamboyant Pod (Delonix regia)

Abdel‐Rahman¹,

Al-Farhan²,

Abu‐Dief³

et al. 2017

Arch Chem Res

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The removing of toxic heavy metals from aqueous solution by agricultural biosorbents was investigated by studying the effect of nano sized (Delonix regia) and chemically modified biosorbent citric acid Delonix regia (CADR) for removing of Pb 2+ ions. TEM, XRD and EDS, FT-IR, SEM methods were used for characterizing the biosorbent (Delonix regia). The effect of contact time, pH, temperature, dosage of biosorbent, and Pb 2+ ion concentration on adsorption process were studied. The maximum biosorption capacities (q m ) of Pb 2+ by Delonix regia biosorbent was 43.62 mg/g. The highest R. E was (93.5%) at pH 5. FT-IR method showed that the adsorption of metal ions occurs by functional groups on the surface of Delonix regia powder. The biosorption process was endothermic from thermodynamic parameters. The pseudo second-order model more fit (R 2 =0.999) than the pseudo first-order model (R 2 =0.985) from studying the kinetic parameters. The experimental data fit with Freundlich isotherm (R 2 close to 1). This results indicated that Delonix regia is available agricultural, low cost and environment friendly biosorbent for removing the Pb 2+ ions.

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“…Some of these methods suffer from high cost or longer testing time for sample analysis. In this study, a rapid and sensitive spectrophotometric method to determine organophosphorus pesticide was used (Mathew et al, 2007). In this method, organophosphorus pesticide was oxidized with slightly excess Nbromosuccinimide (NBS), and the unconsumed NBS was determined with rhodamine B at the maximum absorbance wavelength of 550 nm.…”

Section: Methodsmentioning

confidence: 99%

Advanced Oxidation of Malathion as a Priority Organic Contaminants in Wastewater

Zhang¹,

Pagilla²

2011

proc water environ fed

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Pesticide industry wastewater treatment applying advanced oxidation process (AOP) using photo-Fenton's reagent was investigated in the bench scale experiment. During the first stage of the experiment, AOP experiments were conducted at pH 3 to determine the optimum initial ratios of chemicals, which were malathion: H 2 O 2 = 1:100 and H 2 O 2 : Fe(II) = 40:1. Experiments were also carried out at different initial malathion concentrations to determine the reaction time for the desired effluent under the optimum conditions. It took 1 hour, 2.25 hours and 3 hours to reduce the malathion from different initial concentrations (1, 10, and 33 mg/L) to the desired level. During the second stage of study, specific energy consumption was determined to evaluate the economic feasibility of AOP combination. AOP was demonstrated to be the significant energy consumer by applying the UV light as the catalyst.

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A rapid spectrophotometric assay of some organophosphorus pesticide residues in vegetable samples

Cited by 41 publications

References 6 publications

Simultaneous Determination of Omethoate and Dichlorvos by Capillary Electrophoresis

Simultaneous Determination of Omethoate and Dichlorvos by Capillary Electrophoresis

Removal of Toxic Pb(II) Ions from Aqueous Solution by Nano Sized Flamboyant Pod (Delonix regia)

Advanced Oxidation of Malathion as a Priority Organic Contaminants in Wastewater

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