A bulk liquid membrane–flow injection (BLM–FI) coupled system for the preconcentration and determination of vanadium in saline waters

Pinto, Juan J.; Garcı́a-Vargas, Manuel; Moreno, Carlos

doi:10.1016/j.talanta.2012.10.026

Cited by 14 publications

(13 citation statements)

References 25 publications

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“…A coupled system BLM-flow analysis was used for the spectrophotometric determination of vanadium in marine water (Pinto et al, 2013). The BLM, used for the pre-concentration of the sample to be analysed, contains Aliquat 336 dissolved in a mixture of dodecane and dodecanol.…”

Section: Coupled Systems: Liquid Membranes-flow Analysismentioning

confidence: 99%

Analytical Applications of Transport Through Bulk Liquid Membranes

Diaconu

Ruse

Aboul‐Enein

et al. 2015

Critical Reviews in Analytical Chemistry

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This review discusses the results of research in the use of bulk liquid membranes in separation processes and preconcentration for analytical purposes. It includes some theoretical aspects, definitions, types of liquid membranes, and transport mechanism, as well as advantages of using liquid membranes in laboratory studies. These concepts are necessary to understand fundamental principles of liquid membrane transport. Due to the multiple advantages of liquid membranes several studies present analytical applications of the transport through liquid membranes in separation or preconcentration processes of metallic cations and some organic compounds, such as phenol and phenolic derivatives, organic acids, amino acids, carbohydrates, and drugs. This review presents coupled techniques such as separation through the liquid membrane coupled with flow injection analysis.

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Section: Coupled Systems: Liquid Membranes-flow Analysismentioning

confidence: 99%

Analytical Applications of Transport Through Bulk Liquid Membranes

Diaconu

Ruse

Aboul‐Enein

et al. 2015

Critical Reviews in Analytical Chemistry

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“…However, V(V) is more toxic than V(IV) (Pinto et al 2013). El-Mosehy (2006), who collected sediment samples from the coastal area of the Egyptian seas (Mediterranean and Red Seas) found a mean concentration of 52.61 μg g À1 in the Red Sea sediments, whereas the mean value was 40.58 μg g À1 in the Mediterranean Sea.…”

Section: Vanadiummentioning

confidence: 99%

Harmful Elements in Estuarine and Coastal Systems

Khan

Masiol

Hofer

et al. 2014

PHEs, Environment and Human Health

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Estuaries and coastal zones are dynamic transitional systems which provide many economic and ecological benefits to humans, but also are an ideal habitat for other organisms as well. These areas are becoming contaminated by various anthropogenic activities due to a quick economic growth and urbanization. This chapter explores the sources, chemical speciation, sediment accumulation and removal mechanisms of the harmful elements in estuarine and coastal seawaters. It also describes the effects of toxic elements on aquatic flora and fauna. Finally, the toxic element pollution of the Venice Lagoon, a transitional water body located in the northeastern part of Italy, is discussed as a case study, by presenting the procedures adopted to measure the extent of the pollution, the impacts on organisms and the restoration activities.

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“…di-2-pyridyl ketone (dpk) and a variety of its hydrazonic derivatives (dpk-h) such as hydrazones, semicarbazones, and thiosemicarbazones (see scheme 1) continue to attract research interest because of their physicochemical properties and applications in many areas including medicine [3-5, 8, 9, 12, 19], sensors [17,18], supramolecular networks [1], catalysis [2], etc. .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, spectroscopic and X-ray crystallographic properties of manganese compounds of keto- and enol-coordinated di-2-pyridyl ketone benzoyl hydrazone (dpkbh). Reactions of [Mn(CO)₅Br] with dpkbh

Conry

2016

Journal of Coordination Chemistry

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To cite this article: Mohammed Bakir & Rebecca Conry (2016): Synthesis, spectroscopic and Xray crystallographic properties of manganese compounds of keto-and enol-coordinated di-2-pyridyl ketone benzoyl hydrazone (dpkbh). Reactions of [Mn(CO) 5 Br] with dpkbh, Journal of Coordination Chemistry, ABSTRACT Reactions between [Mn(CO) 5 Br] and dpkbh in low boiling solvents in air gave fac-[Mn I (CO) 3 (κ 2 -N py ,N im -dpkbh)Br]·H 2 O, [Mn II Br 2 (κ 3 -N py ,N im ,O-dpkbh)], and [Mn II (κ 3 -N py ,N im ,O-dpkbh-H) 2 ]·0.5H 2 O (N im = imine nitrogen and N py = pyridyl nitrogen). Crystallization of fac-[Mn I (CO) 3 (κ 2 -N py ,N im -dpkbh) Br]·H 2 O from dmso or CH 3 CN produced dark red crystals of [Mn II (κ 3 -N py ,N im ,Odpkbh-H) 2 ]·nX (X = dmso, n = 1 and X = H 2 O, n = 0.22). This is in contrast to the reaction of [Re(CO) 5 Cl] with dpkbh in refluxing toluene to form fac-[Re I (CO) 3 (κ 2 -,N py ,N py -dpkbh)Cl] which can be crystallized from CH 3 CN, dmso or dmf to form fac-[Re I (CO) 3 (κ 2 -,N py ,N py -dpkbh)Cl]·nX (X = CH 3 CN, n = 0 and solvate = dmso or dmf, n = 1). Infrared spectral measurements are consistent with keto coordination of dpkbh to Mn(I) in fac-[Mn I (CO) 3 (κ 2 -N py ,N im -dpkbh) Br]·H 2 O and Mn(II) in [Mn II Br 2 (κ 3 -N py ,N im ,O-dpkbh)] plus enol coordination of the amide-deprotonated dpkbh, to the Mn(II) center in [Mn II (κ 3 -N py ,N im ,Odpkbh-H) 2 ]·0.5H 2 O. Electronic absorption spectral measurements in nonaqueous solvents indicate sensitivity of fac-[Mn I (CO) 3 (κ 2 -N py ,N im -dpkbh) Br]·H 2 O and [Mn II (κ 3 -N py ,N im ,O-dpkbh-H) 2 ]·0.5H 2 O to changes in their outershell environments. X-ray crystallographic analyses elucidated the identities of [Mn II Br 2 (κ 3 -N py ,N im ,O-dpkbh)] and [Mn II (κ 3 -N py ,N im ,O-dpkbh-H) 2 ]·nX and divulged weaker coordination of [dpkbh] to Mn(II) in [Mn II Br 2 (κ 3 -N py ,N im ,Odpkbh)] and stronger coordination of [dpkbh-H] − to Mn(II) in [Mn II (κ 3 -N py ,N im ,O-dpkbh-H) 2 ]·0.22H 2 O. Low-temperature X-ray structural analyses were employed to account for the disorder in the structure of [Mn II (κ 3 -N py ,N im ,O-dpkbh-H) 2 ] and the short NH bond distance observed in the structure of [Mn II Br 2 (κ 3 -N py ,N im ,O-dpkbh)]. A PLATON SQUEEZE treatment was invoked to account for the fractional occupancy of lattice water in the structure of [Mn II (κ 3 -N py ,N im ,O-dpkbh-H) 2 ]. ARTICLE HISTORY

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A bulk liquid membrane–flow injection (BLM–FI) coupled system for the preconcentration and determination of vanadium in saline waters

Cited by 14 publications

References 25 publications

Analytical Applications of Transport Through Bulk Liquid Membranes

Analytical Applications of Transport Through Bulk Liquid Membranes

Harmful Elements in Estuarine and Coastal Systems

Synthesis, spectroscopic and X-ray crystallographic properties of manganese compounds of keto- and enol-coordinated di-2-pyridyl ketone benzoyl hydrazone (dpkbh). Reactions of [Mn(CO)₅Br] with dpkbh

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A bulk liquid membrane–flow injection (BLM–FI) coupled system for the preconcentration and determination of vanadium in saline waters

Cited by 14 publications

References 25 publications

Analytical Applications of Transport Through Bulk Liquid Membranes

Analytical Applications of Transport Through Bulk Liquid Membranes

Harmful Elements in Estuarine and Coastal Systems

Synthesis, spectroscopic and X-ray crystallographic properties of manganese compounds of keto- and enol-coordinated di-2-pyridyl ketone benzoyl hydrazone (dpkbh). Reactions of [Mn(CO)5Br] with dpkbh

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Synthesis, spectroscopic and X-ray crystallographic properties of manganese compounds of keto- and enol-coordinated di-2-pyridyl ketone benzoyl hydrazone (dpkbh). Reactions of [Mn(CO)₅Br] with dpkbh