Multiwavelength fluorescence based optosensor for simultaneous determination of fuberidazole, carbaryl and benomyl

Reyes, Joan; Martínez, E.; Ortega‐Barrales, P.; Dı́az, A Molina

doi:10.1016/j.talanta.2004.03.049

Cited by 30 publications

(5 citation statements)

References 21 publications

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“…The use of silica gel C18 as a fluorescence optosensor for both TBZ and FBZ combined with zero-order calibration methods has already been described. 14,16,32 Owing to the non-polar nature of the support, complete retention occurs when the analytes are in their neutral forms. The deprotonation constant values reported for TBZ (pK a 1 z 0.5, pK a 2 ¼ 4.8, pK a 3 ¼ 11.3) 33 and FBZ (pK a l ¼ 5.0 and pK a 2 ¼ 11.7) 34 indicate that at a neutral pH both molecules remain in their uncharged structures.…”

Section: Resultsmentioning

confidence: 99%

“…47 Injecting a sample volume of 2,100 mL of a ternary mixture, an LOD of 0.09 ng mL À1 for FBZ was reported. 16 Following a similar procedure, LODs of 0.31 and 0.08 ng mL À1 were obtained for TBZ, using 600 and 3200 mL, respectively, of binary samples. 14 By using a sample volume of 2600 mL, a system formed by TBZ and o-phenylphenol rendered an LOD of 0.09 ng mL À1 for TBZ.…”

Section: Samples Containing Unexpected Agrochemicalsmentioning

confidence: 99%

“…[10][11][12] The group of Molina D ıaz has developed different luminescence-based optosensors for the determination of both binary and ternary mixtures of different fungicides (benomyl, carbendazim, thiabendazole, o-phenylphenol, carbofuran, fuberidazole). [13][14][15][16][17] It is known that the spectral overlapping among the investigated analytes and/or foreign compounds, usually found in complex matrices, leads to decreased selectivity of the luminescence techniques. Resolution of overlapping luminescence profiles can be achieved, however, using multivariate calibration methods.…”

Section: Introductionmentioning

confidence: 99%

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Second-order advantage with excitation-emission fluorescence spectroscopy and a flow-through optosensing device. Simultaneous determination of thiabendazole and fuberidazole in the presence of uncalibrated interferences

Piccirilli

Escandar

2010

Analyst

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This paper presents a novel approach for the simultaneous determination of two widely used fungicides in a very interfering environment, combining the advantage of a spectrofluorimetric optosensor coupled to a flow-injection system and the selectivity of second-order chemometric algorithms. The sensor is based on the simultaneous retention of thiabendazole and fuberidazole on C18-bonded phase placed inside a flow-cell. After the arrival of the analytes to the sensing zone, the flow is stopped and the excitation-emission fluorescence matrix is read in a fast-scanning spectrofluorimeter. Parallel factor analysis (PARAFAC) and unfolded and multidimensional partial least-squares coupled to residual bilinearization (U- and N-PLS/RBL) were selected for data processing. These algorithms achieve the second-order advantage, and are in principle able to overcome the problem of the presence of unexpected interferences. The power of U-PLS/RBL to quantify both fungicides at parts-per-billion levels, even in the presence of high concentrations of spectral interferences such as carbaryl, carbendazim and 1-naphthylacetic acid, is demonstrated. Indeed, U-PLS/RBL allowed us to reach selectivity using a commercial but non-selective sensing support. To the best of our knowledge, this is the first time the potentiality of the 'second-order advantage' is evaluated on a flow-injection system, using an unspecific supporting material and in the presence of three real interferences. Using a sample volume of 2 mL, detection limits of 4 ng mL(-1) and 0.3 ng mL(-1) for thiabendazole and fuberidazol were respectively obtained in samples without interferences. In samples containing interferences, the limits of detection were 17 and 1 ng mL(-1) for thiabendazole and fuberidazol, respectively. The sample frequency, including excitation/emission fluorescence matrix measurements, was 12 samples h(-1). The sensor was satisfactorily applied to the determination of both analytes in real water samples.

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Section: Resultsmentioning

confidence: 99%

Section: Samples Containing Unexpected Agrochemicalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Second-order advantage with excitation-emission fluorescence spectroscopy and a flow-through optosensing device. Simultaneous determination of thiabendazole and fuberidazole in the presence of uncalibrated interferences

Piccirilli

Escandar

2010

Analyst

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“…A recovery study was performed on four different spiked environmental water samples at concentration levels from 0.05 to 0.35 μg mL -1 . The same authors report a novel approach for the simultaneous determination of three widely used pesticides (namely, fuberidazole (FBZ), carbaryl (CBL) and benomyl (BNM)) [78]. The proposed method is based on a single continuous-flow solid surface fluorimetric multi-optosensor implemented with the use of a minicolumn placed just before the flow-through cell and filled with C 18 silica gel.…”

Section: Fluorescencementioning

confidence: 99%

Recent Development in Optical Chemical Sensors Coupling with Flow Injection Analysis

Ojeda

Rojas

2006

Sensors

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Abstract:Optical techniques for chemical analysis are well established and sensors based on these techniques are now attracting considerable attention because of their importance in applications such as environmental monitoring, biomedical sensing, and industrial process control. On the other hand, flow injection analysis (FIA) is advisable for the rapid analysis of microliter volume samples and can be interfaced directly to the chemical process. The FIA has become a widespread automatic analytical method for more reasons; mainly due to the simplicity and low cost of the setups, their versatility, and ease of assembling. In this paper, an overview of flow injection determinations by using optical chemical sensors is provided, and instrumentation, sensor design, and applications are discussed. This work summarizes the most relevant manuscripts from 1980 to date referred to analysis using optical chemical sensors in FIA.

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“…Many FI-SPS methods have been reported for the analysis of pesticides [25,85,[92][93][94][95]. To increase the selectivity, the stepwise elution method was employed as mentioned above.…”

Section: Contaminant and Pesticidesmentioning

confidence: 99%

Recent trends in solid phase spectrometry: 2003–2009. A Review

Matsuoka

Yoshimura

2010

Analytica Chimica Acta

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Around 100 papers published from 2003 to the present are reviewed concerning analytical methods for the direct light measurement of a solid phase in which a target colored or fluorescent analyte is concentrated. Recent attention has been paid to the development of flow injection-solid phase spectrometry as a simple and inexpensive tool for routine analysis of organic compounds or pharmaceuticals. Due to some improvements in flow injection analysis, such as sequential injection and lab-on-a-valve, it is possible not only to reduce the reagent consumption but also to devise fully automatic and miniaturized systems with minimal maintenance needs. This may have the potential of becoming one of the green analytical methods. Flow injection-solid phase spectrometry is expected to be applied to the speciation of trace chemical components (e.g., specific determination of trace metal ions in different existent oxidation states) in real samples in the environment.

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Multiwavelength fluorescence based optosensor for simultaneous determination of fuberidazole, carbaryl and benomyl

Cited by 30 publications

References 21 publications

Second-order advantage with excitation-emission fluorescence spectroscopy and a flow-through optosensing device. Simultaneous determination of thiabendazole and fuberidazole in the presence of uncalibrated interferences

Second-order advantage with excitation-emission fluorescence spectroscopy and a flow-through optosensing device. Simultaneous determination of thiabendazole and fuberidazole in the presence of uncalibrated interferences

Recent Development in Optical Chemical Sensors Coupling with Flow Injection Analysis

Recent trends in solid phase spectrometry: 2003–2009. A Review

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