Synchronous scanning derivative spectrofluorimetry for the determination of cadmium with benzyl-2-pyridylketone 2-quinolylhydrazone

Sánchez, Francisco; Navas, A.; Santiago, Marisa Antunes

doi:10.1016/s0003-2670(00)84423-2

Cited by 33 publications

(4 citation statements)

References 11 publications

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“…The purpose of the work reported here is to determine the herbicide flurecol in soil samples by a simple spectrofluorimetric technique to give an alternative to the classical spectrophotometric methods that are the only ones actually in use for its determination. As demonstrated in previous works (Ramos Garcia Sánchez et al, 1985), the application of the synchronous derivative technique markedly increases both sensitivity and selectivity of the analytical procedure.…”

mentioning

confidence: 68%

A direct spectrofluorimetric determination of the herbicide flurecol in cultivated soils

Garcı́a-Sánchez¹,

Cruces‐Blanco²

1989

J. Agric. Food Chem.

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confidence: 68%

A direct spectrofluorimetric determination of the herbicide flurecol in cultivated soils

Garcı́a-Sánchez¹,

Cruces‐Blanco²

1989

J. Agric. Food Chem.

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“…GarciaSanchez and co-workers [51][52][53][54] have demonstrated the satisfactory sensitivity and selectivity of this approach. The simplification of the spectral profile and the band-narrowing effect coupled with the derivative spectral technique (very useful for the reduction of band overlapping) make both identification of weak bands and magnification of the overall fluorescence signal feasible.…”

Section: Fluorimetric Detection In Stationary Mediamentioning

confidence: 99%

Luminescence methods in pesticide analysis. Applications to the environment

Aaron¹,

Coly²

2000

Analusis

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DossierLuminescence spectroscopy such as the need for pretreatment procedures in the case of weakly volatile and/or thermally labile pesticides (e.g., carbamates, phenylureas and sulfonylureas). The second most utilized method is HPLC, with UV-visible absorption detectors; it remains the technique of choice for screening work.The use of luminescence techniques (especially fluorescence) for organic pesticide residue analysis has been limited by the fact that, relatively few of these compounds are strongly luminescent. However, many compounds do possess the necessary degree of aromaticity and may be converted into luminescent species using a variety of methods. Hence, two distinct cases have to be considered. (i) If the pesticide under study is luminescent, then it can be determined directly; (ii) if the pesticide is non or weakly luminescent, it can be converted into a luminescent compound using various physicochemical means, including chemical and/or photochemical reactions.Derivatization reactions constitute an important aspect of pesticide luminescence analysis since many pesticides have one or more functional groups and can be converted into more stable derivatives to successfully ensure environmental analysis. The number of papers, especially reviews [8][9][10][11][12][13] and books [14][15][16][17], in which this subject is discussed, demonstrates this increase of the derivatization use.In this review, the most important publications concerning significant advances in the luminescence methodology, instrumentation and applications to environmental analysis of pesticides will be reported. We will describe the recent available literature on direct and indirect fluorimetric methods, photochemically-induced fluorescence, photosensitized fluorescence and phosphorimetric methods used for pesticide analysis. As it will be shown, recent instrumentation, including sophisticated electronics and precise optical systems, makes luminescence a highly sensitive and selective tool for pesticide residue detection. Fluorimetric methodsAn early work on the fluorescence of pesticides has been performed in stationary solutions, (i.e., batch procedure) by

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“…Reactant ions which are produced from ß emission into a supporting gas (N2, air) react with analyte through ion/molecule collisions and product ions are produced. Although formation of positive product ions through proton (or NH4+ and NO+) exchanges has been more generally used, negative product ions can also be formed through electron attachment and other mechanisms (7,8). Thus, negative ion mobility spectrometry (NIMS) will result in a mobility spectrum for separation and detection of only negative product ions.…”

Section: Literature Citedmentioning

confidence: 99%

“…Despite their extensive use, both gas-liquid chromatography and thin-layer chromatography require time-consuming and rigorous preparatory purifying steps. Recently, the synchronous derivative technique has been shown to be most useful in many types of trace analysis (7)(8)(9)(10)(11) and this is both simple and rapid. Its band narrowing effect plus the greater discrimination of derivative spectroscopy enhances both sensitivity and selectivity of the analytical methods.…”

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confidence: 99%

Determination of the carbamate herbicide propham by synchronous derivative spectrofluorometry following fluorescamine-fluorogenic labeling

Sánchez¹,

Blanco²

1986

Anal. Chem.

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Three methods for the determination of propham by fluorogenic labeling with fluorescamine and synchronous derivative spectrofluorometry are described and discussed. The herbicide Is hydrolyzed In 1 M NaOH at 100 °C for 40 min, and the liberated aniline reacts Instantaneously with fluorescamine In an aqueous buffer solution (pH 4.0). Reaction rates, fluorescence phenomena, and synchronous derivative parameters are Investigated. To enhance sensitivity, the analysis of the fluorescamine derivative Is used following extraction In ethyl acetate. Linear analytical curves are obtained between 24 and 2000 ng/mL. The minimum detectable quantity Is estimated to be 7.2 ng/mL. Wellwater samples containing low concentrations of carbamate are also analyzed.

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Synchronous scanning derivative spectrofluorimetry for the determination of cadmium with benzyl-2-pyridylketone 2-quinolylhydrazone

Cited by 33 publications

References 11 publications

A direct spectrofluorimetric determination of the herbicide flurecol in cultivated soils

A direct spectrofluorimetric determination of the herbicide flurecol in cultivated soils

Luminescence methods in pesticide analysis. Applications to the environment

Determination of the carbamate herbicide propham by synchronous derivative spectrofluorometry following fluorescamine-fluorogenic labeling

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