Facile and Sensitive Spectrophotometric Determination of Synthetic Pyrithroids in Their Formulations, Water and Grain Samples

Kumar, K. Suresh; Swaroop, Β.; Kanchi, Suvardhan; Rekha, D.; Jayaraj, B.; Chiranjeevi, P.

doi:10.1007/s10661-005-9159-4

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…The LOD was determined as 1.17, 3.8 and 1.62 mg L À1 for CYP, DEL and FEN, respectively on PPY/MWCNT/GCE system, respectively. The LOD values reported here are comparatively lower than the earlier reports and the values are compared in Table 2 [42][43][44][45]. This kind of determination is as per the earlier reports [1,46].…”

Section: Analytical Characteristicssupporting

confidence: 72%

Square-wave stripping voltammetric determination of some organic pollutants using modified electrodes

Manisankar

Sundari

Sasikumar

2009

International Journal of Environmental Analytical Chemistry

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A glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes (MWCNT) and polymer/MWCNT composite was used to study the voltammetric behaviour of three common insecticides namely cypermethrin (CYP), deltamethrin (DEL) and fenvalerate (FEN). The modified electrode surface was characterised by scanning electron microscopy (SEM). The voltammograms of the above mentioned pollutants were studied in the pH range 1-13. Influence of scan rate () was also studied. One well-defined reduction peak was observed for all the said insecticides at pH 13. A systematic study of the experimental parameters such as accumulation potential, accumulation time, initial scan potential, amplitude and frequency that affect the square-wave stripping voltammetric response was carried out and maximum peak current conditions were optimised. Under optimum conditions, stripping voltammetric procedure was developed for the determination of above-mentioned insecticides in conventional and real samples. Calibration plots were derived and the lower limit of determination was found. Sensing of polypyrrole/MWCNT/GCE well among the three electrode systems and the limit of detection (LOD) was found to be 1.17, 3.8 and 1.62 mg L À1 for CYP, DEL and FEN, respectively. The percentage of relative standard deviation was also found.

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Section: Analytical Characteristicssupporting

confidence: 72%

Square-wave stripping voltammetric determination of some organic pollutants using modified electrodes

Manisankar

Sundari

Sasikumar

2009

International Journal of Environmental Analytical Chemistry

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“…The performance of the proposed method was compared statistically in terms of student's t test and the variance ratio of F-test and shown in Table 2. These tests show no significant difference between the proposed method and reported method [18], indicating that the proposed method is accurate and precise.…”

Section: Analytical Datamentioning

confidence: 74%

“…The availability of spectrophotometric apparatus and the simplicity of analytical procedures made the technique very attractive for a wide range of application. Various spectrophotometric methods have also been reported for determination of deltamethrin [17,18].…”

Section: Scheme1 the Chemical Structure Of Deltarmethrinmentioning

confidence: 99%

Sensitive Spectrophotometric Determination of Deltamethrin Insecticide in its Formulation and Environmental Samples

2015

International Journal of Advanced Research in Chemical Science

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Three sensitive spectrophotometric methods were developed for the determination of deltamethrin as synthetic pyrethroid in its formulations and environmental samples. The proposed methods were based on the hydrolysis of deltamethrin with ethanolic KOH to form 3-phenoxy benzaldehyde which condensation with anthranilic acid (Method A), 4-aminoantipyrine (method B) and 2-chlorophenyl hydrazine (method C) to form color product having λ max at 480, 495 and 552 nm, for methods A, B and C, respectively. The color derivatives were stable for 3, 5 and 6 days for methods A, B and C, respectively. The Beer's law was obeyed over the concentration range of 0.2-2.0, 0.5-3.0 and 0.5-4.0 µg mL −1 for methods A, B and C, respectively. The molar absorptivity and Sandell's sensitivity, detection and quantification limits were calculated. The proposed methods have been successfully applied for the determination of deltamethrin in its formulations and environmental samples.

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“…Table 1 Comparison of the proposed methods with the existing spectrophotometric methods for the determination of cypermethrin insecticide Reagents λ max (nm) Beer's range (g mL -1 ) (L mol -1 cm -1 ) LOD (g mL -1 ) Ref. Various spectrophotometric methods using different reagents such as, leuco crystal violet [14], MBTH (3-methyl-2-benzothiazolinone hydrochloride) [15], potassium iodide-iodate solution under acidic conditions [16] and bromine and pyridine with sulphanilic acid [17] have also been reported for determination of cypermethrin. Spectrophotometric and thermoanalytical study of cypermethrin/cyclodextrin complexes [18].…”

Section: Introductionmentioning

confidence: 99%

Sensitive spectrophotometric determination of cypermethrin in its formulations, water and environmental samples

Gouda

Mazroai

2014

Main Group Chemistry

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Three sensitive spectrophotometric methods were developed for the determination of cypermethrin in insecticidal formulations and environmental samples. The methods were based on the hydrolysis of cypermethrin with ethanolic KOH to form 3-phenoxy benzaldehyde. The resultant aldehyde group was condensed with 4-aminobenzoic acid in acidic medium to form red color product having λ max of 500 nm (Method A), condensed with anthranilic acid in presence of basic medium to form orange red color product having λ max of 482 nm (method B) or condensed with 4-chlorophenyl hydrazine to form purple color product having λ max of 550 nm (method C). The color derivatives were stable for 7, 8 and 10 days for methods A, B and C, respectively. The Beer's law was obeyed over the concentration range of 40-1200, 50-1500 and 50-2000 ng mL -1 for methods A, B and C, respectively. The molar absorptivity and Sandell's sensitivity, detection and quantification limits were calculated. The proposed methods have been applied for the analysis of cypermethrin in its formulations, water (tap and river), grain (rice and wheat), vegetables and fruits samples.

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Facile and Sensitive Spectrophotometric Determination of Synthetic Pyrithroids in Their Formulations, Water and Grain Samples

Cited by 7 publications

References 11 publications

Square-wave stripping voltammetric determination of some organic pollutants using modified electrodes

Square-wave stripping voltammetric determination of some organic pollutants using modified electrodes

Sensitive Spectrophotometric Determination of Deltamethrin Insecticide in its Formulation and Environmental Samples

Sensitive spectrophotometric determination of cypermethrin in its formulations, water and environmental samples

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