Solvent Extraction-Spectrophotometric Determination of Nickel(II) in Natural Waters Using DI-2-Pyridyl Ketone Benzoylhydrazone

Terra, Lúcia Helena; Areias, Madalena C. C.; Gaubeur, Ivanise; Encarnación, Maria; Suárez-Iha, V.

doi:10.1080/00387019909349981

Cited by 72 publications

(23 citation statements)

References 22 publications

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“…They also act as herbicides, insecticides, nematocides, rodenticides, plant growth regulators, sterilants for houseflies, among other applications [10,11,13]. In analytical chemistry hydrazones find applications as multidentate ligands for transition metals in colorimetric or fluorimetric determinations [14,15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Spectral Characterization of Hydrazone Schiff Bases Derived from 2,4-Dinitrophenylhydrazine. Crystal Structure of Salicylaldehyde-2,4-Dinitrophenylhydrazone

Hosseini‐Monfared

Pouralimardan

Janiak

2007

Zeitschrift Für Naturforschung B

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Reactions of 2,4-dinitrophenylhydrazine with salicylaldehyde, pyridine-2-carbaldehyde and 2-aminobenzophenone in methanol result in the hydrazone Schiff base ligands salicylaldehyde-, pyridine-2-carbaldehyde-, and 2-aminobenzophenone-2,4-dinitrophenylhydrazone, respectively. Crystals of salicylaldehyde-2,4-dinitrophenylhydrazone are monoclinic, space group P2 1 /c, a = 13.820(3), b = 4.3515(9), c = 25.159(7)Å, β = 123.01(2) • with Z = 4. The molecular packing is mostly a zigzag or herring-bone pattern.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Spectral Characterization of Hydrazone Schiff Bases Derived from 2,4-Dinitrophenylhydrazine. Crystal Structure of Salicylaldehyde-2,4-Dinitrophenylhydrazone

Hosseini‐Monfared

Pouralimardan

Janiak

2007

Zeitschrift Für Naturforschung B

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“…dPKBH has been previously described as a bidentate or tridentate ligand for several heavy metals [12]. Besides this, it has been applied to the spectrophotometric determination of iron [13,14,15], palladium [16], cobalt [17,18,19] and nickel [20,21].…”

Section: Introductionmentioning

confidence: 99%

A simple and very sensitive spectrophotometric method for the direct determination of copper ions

2002

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A sensitive spectrophotometric method for the direct determination of copper in aqueous samples without a preconcentration step has been developed. It is based on the formation of a yellow complex with the chromogenic reagent di-2-pyridyl ketone benzoylhydrazone (dPKBH) in an alkaline medium. The complex stoichiometry was 1:2 (Cu:dPKBH) and presents maximum absorbance at 370 nm. The influence of chemical variables affecting the behaviour of the system such as pH, concentration of dPKBH, buffer solution and ethanol, order of addition of the reagents and stability of the complex, were evaluated. The molar absorptivity (epsilon) was 3.92x10(4) L mol(-1) cm(-1), and Beer's law was obeyed up to 3 mg L(-1) of copper. The relative standard deviation was 0.46% (n=11) for a sample containing 1 mg L(-1) Cu(II). The limit of detection was 2.5 micro g L(-1) and was therefore more sensitive than the direct methods reported previously. Finally, the method was successfully validated by analysing several real samples with different matrices, such as tap water, natural water or copper alloys, with an average relative error of 2.46%.

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“…A number of researchers synthesized and evaluated the biological activities of hydrazones. These compounds possess diverse biological and pharmacological properties such as antimicrobial, anti-inflammatory, analgesic, antifungal, anti-tubercular, antiviral, anticancer, antiplatelet, antimalarial, anticonvulsant, cardio protective, antihelmintic, antiprotozoal, antitrypanosomal, antischistosomiasis and so on [2][3][4][5][6]. On the other hand, hydrazones are useful spectrophotometric reagents because of their selectivity for metal ions [7].…”

Section: Introductionmentioning

confidence: 99%

Investigation Od Acid-Base Properties of Aromatic Hydrazones in Basic Media at Constant Ionic Strength

Jankulovska¹,

Dimova²,

Spirevska³

2017

RAD Conference Proceedings

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Abstract. UV spectroscopic methods were used in order to determine dissociation constants of some aromatic hydrazones. The acid-base properties of investigated hydrazones were followed in sodium hydroxide media at constant ionic strength of 0.5 mol/dm 3 adjusted with sodium perchlorate. Absorption band with the maximum of 330 nm was noticed in neutral media. A batochromic shift of this band was observed in basic media, probably due to the dissociation process. The dissociation process took place in one step for four investigated hydrazones and in two steps for the hydrazone with a phenol group in its molecule. The absorbance data from the UV spectra were used for the calculation of dissociation constants. The obtained pKHA values were between 2.11 and 2.62 which suggested that the influence of the substituents is not significant. At the same time, pKHA values were determined graphically from the intercept of the dependence of logI on pH. There are no important differences between calculated and graphically determined dissociation constant values.

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Solvent Extraction-Spectrophotometric Determination of Nickel(II) in Natural Waters Using DI-2-Pyridyl Ketone Benzoylhydrazone

Cited by 72 publications

References 22 publications

Synthesis and Spectral Characterization of Hydrazone Schiff Bases Derived from 2,4-Dinitrophenylhydrazine. Crystal Structure of Salicylaldehyde-2,4-Dinitrophenylhydrazone

Synthesis and Spectral Characterization of Hydrazone Schiff Bases Derived from 2,4-Dinitrophenylhydrazine. Crystal Structure of Salicylaldehyde-2,4-Dinitrophenylhydrazone

A simple and very sensitive spectrophotometric method for the direct determination of copper ions

Investigation Od Acid-Base Properties of Aromatic Hydrazones in Basic Media at Constant Ionic Strength

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