The determination of organochlorine compounds by adsorptive stripping voltammetry, part I: <i>p</i>,<i>p</i>′‐DDT and dieldrin

Li, Chiang; James, B. D.; Magee, R.J.

doi:10.1002/elan.1140020112

Cited by 15 publications

(5 citation statements)

References 7 publications

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“…The reaction of the metallic ion with dieldrin maybe explained by the fact that it contains an epoxy group and a C5 5C bond, absent in p,p 0 -DDT. [27] In the literature, the techniques more used for the determination of these group of pesticides were DPV and AdSV.…”

Section: Organochlorides Pesticidesmentioning

confidence: 99%

Electrochemical Methods in Pesticides Control

et al. 2004

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The state of the art of voltammetric and amperometric methods used in the study and determination of pesticides in crops, food, phytopharmaceutical products, and environmental samples is reviewed. The main structural groups of pesticides, i.e., triazines, organophosphates, organochlorides, nitrocompounds, carbamates, thiocarbamates, sulfonylureas, and bipyridinium compounds are considered with some degradation products. The advantages, drawbacks, and trends in the development of voltammetric and amperometric methods for study and determination of pesticides in these samples are discussed.

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Section: Organochlorides Pesticidesmentioning

confidence: 99%

Electrochemical Methods in Pesticides Control

et al. 2004

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“…Use of pesticides in agricultural production and the negative environmental impacts associated with these compounds has led to the development of different electroanalytical techniques [1][2][3][4][5][6][7] and studying the electrokinetics of such compounds. Electrochemical methods are applied in toxicological, ecotoxicological and environmental regulations due to the applicability over a wide concentration range [8] using techniques starting from coulometry, cyclic voltammetry to differential pulse voltammetry.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior of 1,2,4-Triazole and Benzotriazole at Glassy Carbon Electrode in Acidic Media~!2010-01-15~!2010-06-14~!2010-07-06~!

Lokesh¹,

Satpati²,

Sherigara³

2010

TOELECJ

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Electrochemical investigations of 1,2,4-triazole and benzotriazole in aqueous acidic media has been carried out by cyclic voltammetric measurements. Cyclic voltammetric experiments were carried on glassy carbon (GC) working electrode. Effect of potential scan rate, pH of the solution and use of different surfactant on the electrochemical behavior has been investigated. Single reduction wave was observed for 1,2,4-triazole due to the reduction of N=N moiety and no oxidation peak was observed in the reverse scan. In case of benzotriazole one clear reduction peak was observed in the cathodic scan and no anodic peak was seen. Effect of pH, sweep rate, analyte concentrations and the presence of different surfactants on the reduction peak current was evaluated. Electro-reduction processes of both the compounds were found to be diffusion controlled in nature. The plausible mechanism for the electroreduction process was proposed. Electrochemical property of two compounds was also studied under hydrodynamic conditions using glassy carbon rotating disc electrode.

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“…14, No. 4,2003 of organic solvents according to their dieletric constants (∈ r ). 24 Group 1 comprised solvents with low polarity as hexane (∈ r = 1.89), tetrachloromethane (∈ r = 2.24), benzene (∈ r = 2.28), chloroform (∈ r = 4.81), ethyl acetate (∈ r = 6.02), tetrahydrofuran (∈ r = 7.58), and dichloromethane (∈ r = 8.93).…”

Section: Extraction Of Triazine Herbicides From Hd Solutionsmentioning

confidence: 99%

“…Besides the frequently used chromatographic measurements, voltammetry, mainly with differential pulse modes [1][2][3][4][5][6][7][8][9] should be taken into consideration as a fast, easy and inexpensive alternative. Additionally, the sensitivity of the electrochemical methods, their applicability over an unusually wide concentration range, is highly satisfactory for meeting requirements of toxicological, ecotoxicological and environmental regulation enforcement.…”

Section: Introductionmentioning

confidence: 99%

Determination of triazines in hemodialysis saline solutions by adsorptive stripping voltammetry after extraction in acetonitrile

Nascimento¹,

Bohrer²,

Carvalho³

et al. 2003

J. Braz. Chem. Soc.

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A determinação de herbicidas 2-metiltio-4,6-dialquilamino-1,3,5-triazina (triazinas) em soluções salinas utilizadas em hemodiálise foi investigada por voltametria. Os herbicidas foram detectados com grande sensibilidade nas soluções salinas, após extração em fase de acetonitrila (ACN), utilizando o eletrodo de mercúrio de gota pendente. O efeito de salting out originado pelo meio salino existente nas soluções viabilizou as extrações. A relação de volumes entre as fases salina e de ACN foi investigada para alcançar a melhor sensibilidade na detecção das triazinas. A especiação entre as triazinas investigadas (ametrina, desmetrina, prometrina e terbutrina) não foi possível e recuperações entre 88 e 107% foram calculadas em amostras fortificadas com os analitos. Utilizando esta metodologia, limites de detecção de 0,03 µmol L -1 foram calculados para as triazinas nas amostras salinas.A method for the voltammetric determination of 2-methylthio-4,6-dialkylamino-1,3,5-triazine (triazines) herbicides in hemodialysis (HD) saline solutions was developed. The herbicides were detected in the saline solutions at the hanging mercury drop electrode (HMDE) with high sensitivities only after extraction of the analytes in acetonitrile (ACN). The salting out effect originated by the saline environment existing in the solutions enabled the extractions. The volume ratio between the saline and ACN phases was investigated in order to find the best sensitivity to detect the triazines. The speciation amongst them (ametryn, desmetryn, prometryn and terbutryn) was not possible. Recoveries between 88 and 107% were calculated in spiked samples, and detection limits of 0.03 µmol L -1 were calculated for the triazines in the saline samples using this methodology. Keywords: herbicides, triazines, hemodialysis, voltammetry IntroductionThe growing interest in the use of pesticides in agricultural production and their negative environmental impact has led to a number of studies for the development of different analytical methods. Besides the frequently used chromatographic measurements, voltammetry, mainly with differential pulse modes 1-9 should be taken into consideration as a fast, easy and inexpensive alternative. Additionally, the sensitivity of the electrochemical methods, their applicability over an unusually wide concentration range, is highly satisfactory for meeting requirements of toxicological, ecotoxicological and environmental regulation enforcement. 10 Hemodialysis (HD) solutions are prepared by mixing pure water and a high-salt (HS) content solution (about 7.0 mol L -1 ) to compose the final HD solution that has a salt concentration of about 0.2 mol L -1 . It is used to maintain the blood ionic equilibrium of the patients during the hemodialysis sessions. The presence of contaminants in the water or in HS solutions must be detected before a hemodialysis session as the HD solution remains very close to the blood of the patients separated only by the dialysis membranes. To aggravate the problem, the dialysis membranes can dialysate ...

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The determination of organochlorine compounds by adsorptive stripping voltammetry, part I: p,p′‐DDT and dieldrin

Cited by 15 publications

References 7 publications

Electrochemical Methods in Pesticides Control

Electrochemical Methods in Pesticides Control

Electrochemical Behavior of 1,2,4-Triazole and Benzotriazole at Glassy Carbon Electrode in Acidic Media~!2010-01-15~!2010-06-14~!2010-07-06~!

Determination of triazines in hemodialysis saline solutions by adsorptive stripping voltammetry after extraction in acetonitrile

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