Determination of diquat by flow injection–chemiluminescence

López-Paz, José Luis; Catalá-Icardo, Mónica; Antón-Garrido, B.

doi:10.1007/s00216-009-2609-z

Cited by 16 publications

(9 citation statements)

References 20 publications

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“…Due to the high sensitivity of the technique, low detection limits can be reached with a wide range of linearity. In recent years, there have been proposed in the 4 literature a wide variety of flow-injection chemiluminescence (FI-CL) methods that allow rapid, selective and sensitive determination of pesticides such as diuron [19], paraquat [20], imazalil [21], thiram [22], asulam [23], diquat [24], carbofuran and promecarb [25,26 ], carbaryl [27] and pirimicarb [28] among others. However, to the authors' knowledge, none has been described the FI-CL method for the determination of Fenamiphos nematicide in the literature for any.…”

Section: Introductionmentioning

confidence: 99%

Sensitive determination of Fenamiphos in water samples by flow injection photoinduced chemiluminescence

Benito

Lloret

Torres-Cartas

2012

International Journal of Environmental Analytical Chemistry

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In this work, a sensitive flow injection chemiluminescence (FI-CL) method for the determination of nematicide Fenamiphos in a rapid and simple way is proposed.Fenamiphos is firstly photodegraded in basic medium. These photofragments react with Ce(IV) providing the chemiluminescence signal. To the authors' knowledge, no chemiluminescence method has been described in the literature for the determination of the nematicide Fenamiphos. All physical and chemical parameters in the flow injection chemiluminescence system were optimized in order to obtain the best sensitivity, selectivity and sample throughput. Before the injection of the sample in the FI-CL system, a preconcentration step with solid phase extraction C18 cartridges was performed. By applying SPE to 250 mL of standard (final volume 10 mL), the linear dynamic range was between 3.4 and 60 µg L -1 , and the detection limit was 1 µg L -1 .When SPE was applied to 500 mL of standard (final volume 10 mL), the detection limit was 0.5 µg L -1 . These detection limits are below the emission limit value established by the Spanish Regulations of the Hydraulic Public Domain for pesticides (50 µg L -1 ) and of the same order as the limit established for total pesticides (0.5 µg L -1 ) at EuropeanDirective on the quality of water for human consumption. The sample throughput was 126 hour -1 . Intraday and interday coefficients of variation were below 10% in all cases.No interference was registered in presence of usual concentrations of anions, cations and other organophosphorus pesticides. The method was successfully applied to the analysis of environmental water samples, obtaining recoveries between 96 and 107.5%.

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Section: Introductionmentioning

confidence: 99%

Sensitive determination of Fenamiphos in water samples by flow injection photoinduced chemiluminescence

Benito

Lloret

Torres-Cartas

2012

International Journal of Environmental Analytical Chemistry

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“…Moreover, chemiluminescence provides wide dynamic range with cheap and simple instrumentation. Recently, the coupling of Flow Injection Analysis (FIA) techniques and CL detection has been used to carry out the determination of several pesticides with low limits of detection, short time analysis and high throughputs [25][26][27][28][29][30][31][32]. Up to now, to the author's knowledge no FI-CL method has been reported for MCPA.…”

Section: Introductionmentioning

confidence: 99%

FI on-line chemiluminescence reaction for determination of MCPA in water samples

2011

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This paper reports an economic, simple and rapid FI-CL method for the determination of MCPA. This method requires simple instrumentation and it is fast enough to be used in routine analyses. Chemiluminescence signal is generated by reaction between photodegraded MCPA and ferricyanide solution in alkaline medium. All physical and chemical parameters in the flow injection chemiluminescence system were optimized in the experimental setting. To eliminate the interferences a solid phase extraction stage with SDB-1 cartridges and ethanol elution is applied. The signal-MCPA concentration relation is linear in concentration intervals between 0.0015 μg·mL -1 and 0.6 μg·mL -1 . The calibration lines are statistically similar in different working conditions: standards with ethanol without extraction and standards with ethanol and extraction, allowing standards to be excluded from the extraction step, which simplifies the process. The detection limit (DL) is 0.5 ng·mL -1 , which is the same order as the maximum limit established in legislation regarding pesticide limits in water destined for human consumption. A DL of 0.13 ng·mL -1 can be reached if a sample of 100 mL is preconcentrated. The interday variance coefficient is 3% and the sample throughput is 90 hour -1 . The water analysis method is efficient with relative error percentages lower than 5% with respect to the added concentration.

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“…[31][32][33] However, to the best of authors' knowledge, up to now the only chemiluminescent method for detecting diuron has been that proposed by Ciumasu et al 34 Those authors developed a field analysis kit for a number of pollutants, including diuron, based on immobilizing monoclonal antibodies by adsorption on a gold surface of pyramidal structures. A miniaturized flow injection analysis (FIA) system was used to transport the enzymatic tracer and the sample to the single-use chip.…”

Section: Introductionmentioning

confidence: 99%

“…The FIA-PICL combination provided a highly simple, fast and precise method, using a very simple and economic instrumentation. [35][36][37] The irradiation step was performed on-line and it can be considered as a clean, cheap and reproducible way for the derivatization of diuron. On the other hand, selectivity and sensitivity could be greatly improved with SPE systems.…”

Section: Introductionmentioning

confidence: 99%

FI-photoinduced Chemiluminescence Method for Diuron Determination in Water Samples

2011

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A new method for the determination of the herbicide diuron, using a flow injection manifold and photoinduced chemiluminescence detection, is presented. The pesticide, in basic medium, was irradiated on-line with UV light (254 nm) for 53 s. A short discussion about the possible irradiation products is included. The chemiluminescent response of the photoproducts was induced by oxidation with potassium ferricyanide in phosphate buffer at pH 11.5. The method permitted the quantification of diuron over the 0.1 -4.0 mg L -1 range, with a detection limit (S/N = 3) of 20 μg L -1 when the method was applied directly. However, the use of solid phase extraction (SPE) performed with C18 cartridges allowed us to achieve a limit of detection of 0.4 μg L -1 and a 1.5 -30 μg L -1 dynamic range. The method was successfully applied to the diuron determination in samples of water from different sources (spring, ground, mineral, irrigation, sea and tap waters) with a low consumption of reagents.

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Determination of diquat by flow injection–chemiluminescence

Cited by 16 publications

References 20 publications

Sensitive determination of Fenamiphos in water samples by flow injection photoinduced chemiluminescence

Sensitive determination of Fenamiphos in water samples by flow injection photoinduced chemiluminescence

FI on-line chemiluminescence reaction for determination of MCPA in water samples

FI-photoinduced Chemiluminescence Method for Diuron Determination in Water Samples

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