Use of Cdse/ZnS quantum dots for sensitive detection and quantification of paraquat in water samples

Durán, Gema M.; Contento, Ana M.; Ríos, Ángel

doi:10.1016/j.aca.2013.09.003

Cited by 43 publications

(19 citation statements)

References 38 publications

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“…[12][13][14][15][16][17][18][19] In some cases,n egatively chargedp olymers or nanoparticles have also been used for the detection of PQ through electrostatic interactions. [20][21] However, the poor selectivity of these probes for PQ over other compounds often limits their ability to analyze PQ concentrationsi nc omplex real-lifes amples. Moreover,t od ate, there are no reports on the successful discrimination of PQ from its structurally relateda nalogue, diquat (DQ).…”

Section: Introductionmentioning

confidence: 99%

Utilization of Red‐Light‐Emitting CdTe Nanoparticles for the Trace‐Level Detection of Harmful Herbicides in Adulterated Food and Agricultural Crops

Dey

Bhagat

Cherukaraveedu

et al. 2016

Chemistry An Asian Journal

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Red-light-emitting water-soluble semiconducting quantum dots (QDs) were synthesized by using a wide variety of commercially available thiol-type capping agents. QDs with a negatively charged nanosurface showed excellent selectivity for paraquat (PQ) at pH 7.4 over other commonly encountered pesticides/herbicides, including diquat (DQ). The presence of a 4,4'-bis-pyridinium unit in PQ enabled it to initiate long-range aggregation, thereby leading to the formation of nanostructures with excellent emission-quenching behavior. Precoated quartz plates were developed as a low-cost, portable sensor for the on-site detection of PQ in both natural water and human urine. Estimation of the PQ concentration was performed in different commercial formulations and the detection of PQ contamination in adulterated dairy product was also achieved with excellent sensitivity. Finally, we screened more than 50 different food items, including vegetables, fruits, cereals, and fodders, to construct a generalized marker for any residual PQ in such specimens.

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Section: Introductionmentioning

confidence: 99%

Utilization of Red‐Light‐Emitting CdTe Nanoparticles for the Trace‐Level Detection of Harmful Herbicides in Adulterated Food and Agricultural Crops

Dey

Bhagat

Cherukaraveedu

et al. 2016

Chemistry An Asian Journal

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“…water, soil, fruit juice, human serum etc.) which comprise high performance liquid chromatography (HPLC) [7][8][9][10], electrochemistry [11][12][13][14], sensor [15,16], spectrophotometry [17][18][19][20][21], and flow based techniques [19][20][21][22][23]. Chromatography is popular technique to determine paraquat in different samples.…”

Section: Introductionmentioning

confidence: 99%

Simple flow injection colorimetric system for determination of paraquat in natural water

Chuntib

Jakmunee

2015

Talanta

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“…Paraquat (1,1′‐dimethyl‐4,4′‐bipyridilium dichloride, PQ) is a synthetic bipyridyl quaternary ammonium salt and non‐selective herbicide. It shows a high solubility in water, up to 620 g L −1 (298.15 K) 2, and is a serious environmental contaminant and poison to humans and animals. The Brazilian Agency responsible for sanitary control (Agência Nacional de Vigilância Sanitária, ANVISA) 3 classified paraquat as a compound with a major level of toxicity.…”

Section: Introductionmentioning

confidence: 99%

“…Paraquat is a banned substance in the European Union 2. Hence, the US Environmental Protection Agency (EPA) has included paraquat in a priority list of hazardous chemicals and established a drinking water equivalent level (DWEL) of 200 µg L −1 and a maximum contaminant level goal of 30 µg L −1 for paraquat in drinking water 2.…”

Section: Introductionmentioning

confidence: 99%

Non‐Invasive Salivary Electrochemical Quantification of Paraquat Poisoning Using Boron Doped Diamond Electrode

2015

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The present work describes the first electrochemical method for quantifying paraquat herbicide poisoning in human saliva samples. Paraquat shows two couples of well‐defined peaks in aqueous solution using a boron doped diamond (BDD) electrode. By using square wave voltammetry (SWV) technique under optimum experimental conditions, a linear analytical curve was obtained for paraquat concentrations ranging from 0.800 to 167 µmol L−1, with a detection limit of 70 nmol L−1. This method was applied to quantify paraquat spikes in human saliva samples and in two different water samples (tap and river). The recovery values obtained ranged from 83.0 to 104 % and 99.1 to 105 %, respectively, which highlight the accuracy of the proposed method.

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Use of Cdse/ZnS quantum dots for sensitive detection and quantification of paraquat in water samples

Cited by 43 publications

References 38 publications

Utilization of Red‐Light‐Emitting CdTe Nanoparticles for the Trace‐Level Detection of Harmful Herbicides in Adulterated Food and Agricultural Crops

Utilization of Red‐Light‐Emitting CdTe Nanoparticles for the Trace‐Level Detection of Harmful Herbicides in Adulterated Food and Agricultural Crops

Simple flow injection colorimetric system for determination of paraquat in natural water

Non‐Invasive Salivary Electrochemical Quantification of Paraquat Poisoning Using Boron Doped Diamond Electrode

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