Synthesis and characterization of 1,2-cyclohexanedione bis-benzoyl-hydrazone and its application to the determination of ti in minerals and rocks

Garcı́a-Vargas, Manuel; Trevilla, S.; Milla, M.

doi:10.1016/0039-9140(86)80053-4

Cited by 13 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When compared to the other existing [11][12][13][14][15][16][17][18][19] methods (Table 1). The developed method retains specific interaction of titanium(IV) with 3,4-DHBINH to form a colored complex and has good sensitivity at room temperature without the need of extraction.…”

Section: Resultsmentioning

confidence: 99%

Spectrophotometric Determination of Titanium(IV) by Using 3,4-Dihydroxybenzaldehydeisonicotinoyl- hydrazone(3,4-DHBINH) as a Chromogenic Agent

Suvarapu¹,

Seo²,

Baek³

2012

Chem Sci Trans

View full text Add to dashboard Cite

3,4-Dihydroxybenzaldehydeisonicotinoylhydrazone(3,4-DHBINH) was prepared, characterized with spectral analyses and used for developing a new method for the simple, sensitive and rapid spectrophotometric determination of titanium(IV) which gives maximum absorbance at wave length 370 nm. The metal ion gives a yellow colored complex with 3,4-DHBINH in acetate buffer of pH 3.5 with 1:2 (metal: ligand) composition. The method obeys Beer's law in the range 0.5-4.25 ppm of titanium(IV). The molar absorptivity and Sandell's sensitivity were found to be 1.489×10 4 L mol -1 cm -1 and 0.003217 µg cm -2 , respectively at 370 nm. The correlation co-efficient of the Ti(IV)-3,4-DHBINH complex was 1.00125 which indicated an excellent linearity between the two variables. The repeatability of the method was checked by finding the relative standard deviation (RSD) as 0.347% (n=5) and its detection limit 0.0053 µg mL -1 of titanium(IV). The interfering effect of various cations and anions were also studied.

show abstract

Section: Resultsmentioning

confidence: 99%

Spectrophotometric Determination of Titanium(IV) by Using 3,4-Dihydroxybenzaldehydeisonicotinoyl- hydrazone(3,4-DHBINH) as a Chromogenic Agent

Suvarapu¹,

Seo²,

Baek³

2012

Chem Sci Trans

View full text Add to dashboard Cite

show abstract

“…Humic acid sodium salt was obtained from Aldrich (Steinheim, Germany). The active component of the liquid membrane, 1,2-cyclohexanedione bis-benzoylhydrazone (1,2-CHBBH), was synthesised as previously described [ 33 ]. All solutions were prepared using deionised water (18 MΩ·cm −1 ) from a Milli-Q analytical reagent grade water purification system (Millipore, Bedford, MA, USA).…”

Section: Methodsmentioning

confidence: 99%

“…The general reaction for the extraction of free nickel ions with 1,2-CHBBH can be expressed as follows [ 32 , 33 , 36 , 37 ]: Ni 2+ (ac) + 2 HR (org) ↔ NiR 2 (org) + 2 H + (ac) where HR represents the acidic extractant reagent 1,2-CHBBH.…”

Section: Methodsmentioning

confidence: 99%

Liquid Membranes as a Tool for Chemical Speciation of Metals in Natural Waters: Organic and Inorganic Complexes of Nickel

2018

View full text Add to dashboard Cite

The different species of nickel present in natural waters exhibit different transport behaviour through bulk liquid membranes (BLMs). This fact has been used to design and optimise a separation/pre-concentration system applicable to separate labile and non-labile nickel fractions. A hydrazone derivative—1,2-cyclohexanedione bis-benzoyl-hydrazone (1,2-CHBBH) dissolved in toluene/dimethyl formamide (2% DMF)—was used as a chemical carrier of nickel species, from an aqueous source solution (sample) to a receiving acidic solution. Both chemical and hydrodynamic conditions controlling the transport system were studied and optimised. Under optimum conditions, variations in the transport of nickel ions as a function of organic (humic acids) and inorganic (chloride ions) ligands were studied. Relationships between the permeability coefficient (P) or recovery efficiency (%R) and the concentrations of ligands and nickel species were analysed using Winhumic V software. A negative correlation between P and the concentration of organic nickel complexes was found, suggesting that only labile nickel species are transported through the liquid membrane, with non-labile complexes remaining in the water sample; allowing for their separation and subsequent quantification in natural waters.

show abstract

“…Ammonium pyrrolidine dithiocarbamate (APDC) was purchased from Fluka (Buchs, Switzerland). The active component of the liquid membrane, 1,2-cyclohexanedione bis-benzoylhydrazone (1,2-CHBBH), was synthesized as described previously [29]. All solutions were prepared with deionized water (18 MΩ•cm −1 ) from a Milli-Q analytical reagent grade water purification system (Millipore, Bedford, MA, USA).…”

Section: Reagents and Solutionsmentioning

confidence: 99%

A Coupled Extraction/Re-Extraction Method for the Chemical Speciation of Nickel in Natural Waters

2019

View full text Add to dashboard Cite

Chemical fractionation and speciation of metals species in natural waters and its relation with bioavailability have received increased attention in recent years. A simple liquid membranes method, based on coupled liquid extraction and re-extraction processes, is proposed to separate and quantify the species of nickel present in water samples. A simplex optimization of chemical variables, such as carrier concentration in the organic solution and nitric acid concentration in the receiving solution, was performed and, under optimized conditions, the extraction system was applied to determine nickel species in water samples at natural level concentrations. A linear relationship was established between extraction efficacy and the concentration of dissolved organic carbon in the samples, allowing the separation and determination of labile and non-labile nickel fractions, since the latter was not transported through the organic solution acting as liquid membrane. When the total and labile concentrations of metals were analyzed in real samples with different salinities, no significant differences were found between the results obtained and those from well-established methods. An average relative error of 1.50 and 2.37 was obtained for total Ni concentration and labile fraction, respectively. Finally, a comparison with the theoretical speciation data calculated with the software WinHumic V was successfully performed. Thus, the proposed method allows the simultaneous determination of labile and non-labile nickel fractions, presented as a simple alternative to nickel fractionation in natural waters.

show abstract

Synthesis and characterization of 1,2-cyclohexanedione bis-benzoyl-hydrazone and its application to the determination of ti in minerals and rocks

Cited by 13 publications

References 23 publications

Spectrophotometric Determination of Titanium(IV) by Using 3,4-Dihydroxybenzaldehydeisonicotinoyl- hydrazone(3,4-DHBINH) as a Chromogenic Agent

Spectrophotometric Determination of Titanium(IV) by Using 3,4-Dihydroxybenzaldehydeisonicotinoyl- hydrazone(3,4-DHBINH) as a Chromogenic Agent

Liquid Membranes as a Tool for Chemical Speciation of Metals in Natural Waters: Organic and Inorganic Complexes of Nickel

A Coupled Extraction/Re-Extraction Method for the Chemical Speciation of Nickel in Natural Waters

Contact Info

Product

Resources

About