Spectrophotometric Determination of Trace Amounts of Cu (II) in Water Samples after Micelle-Mediated Extraction

Muthuselvi, Raghunathan; Vashantha, R.

doi:10.5958/0974-4150.2018.00064.0

Cited by 4 publications

(4 citation statements)

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“…The extremely effective eluent for flavonoids extraction from Bidens tripartite was the aqueous solution of C9-11 Pareth-5 (Rokanol ® NL5, HLB = 8.6), i.e., the most hydrophilic among the studied Rokanols ® . In the case of sourcing of polyphenols essences, any overall trend was not observed, but still, the content of the actives in NL5 concentrated extracts was higher than in other cases [9]. For calendula flowers, the solution of C9-11 Pareth-5 (C9/11E5) was also the most effective medium for polyphenols extraction.…”

Section: Extractionmentioning

confidence: 91%

“…In some cases, the use of a mixture of non-ionic and ionic surfactants seems to be beneficial. That approach causes an increase in the extraction efficiency of polar organic compounds [9]. The solubilization yield of weakly polar molecules, such as long-chain hydrocarbons, usually increase with lengthening hydrophobic surfactant chains [1,10].…”

Section: Introductionmentioning

confidence: 99%

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The Accumulated Effect of the Number of Ethylene Oxide Units and/or Carbon Chain Length in Surfactants Structure on the Nano-Micellar Extraction of Flavonoids

Śliwa

2020

JFB

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Classical extraction methods used for isolation of active substances from plant material are expensive, complicated and often environmentally unfriendly. The ultrasonic assistance micelle-mediated extraction method (UAMME), based on green chemistry principles, seems to be an interesting alternative. This work aimed to find a connection between the chemical structure of non-ionic surfactants and the efficiency of the extraction process. The effect of hydrophobic chain length and number of ethoxy groups on the quality of Bidens tripartite extracts was investigated. Several ethoxylated fatty alcohols were used: Ceteareth-20, Steareth-20, Oleth-20, Oleth-10, Oleth-5, C12-C13 Pareth-12, C12-C15 Pareth-12 and Ceteareth-12. The bioflavonoid compositions with the HPLC method was determined. The hydrophilic lipophilic balance (HLB) of studied surfactants, as well as the surface tension of surfactant solutions, were compared, to determine the explanation for the obtained differences in bioflavonoids concentration. The structural changes influenced by polyphenol extraction were monitored using Dynamic Light Scattering (DLS) measurements. In this work, probably for the first time, the connection between the chemical structure of non-ionic surfactants and the efficiency of the extraction process was found. The experimental and theoretical approach rationalized the choice of an appropriate eluent. We propose some structurally dependent factors, whose optimal value gave a high efficiency to the UAMME.

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Section: Extractionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

The Accumulated Effect of the Number of Ethylene Oxide Units and/or Carbon Chain Length in Surfactants Structure on the Nano-Micellar Extraction of Flavonoids

Śliwa

2020

JFB

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“…A negative value of enthalpy explained that the reaction was exothermic for that, it can be noted by decreasing the temperature the possibility of complex formation will be increased, in addition to that the reaction was spontaneous according to the negative sign of free energy. (21,22) The stability of the complex was confirmed due to the value of entropy which approaches to zero(less random and spontaneous).…”

Section: Study the Stability Of The Complexmentioning

confidence: 98%

Determination of Ni(II) in Alloy by Spectrophotometric Method with a new Chromogenic Reagent (IDPBS)

Kadhim

Abbas

Alda

2020

ijpqa

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A new chromogenic reagent 4-((imidazole-2-yl)diazenyl)-N-(pyrimidin-2-yl)benzenesulfonamide was synthesized by the reaction between imidazole and Sulphadiazine as azo reagent and used as new spectrophotometric method with highly sensitive to determined Nickel (II). The reagent reacts with nickel(II) in aqueous solution at pH= 7 to form dark- brown colored complex. The reagent and its complex were identified by Fourier transform infrared (FT-IR), Uv-visible,1HNMR, and 13CNMR spectroscopies and investigate the formula and charge of the prepared complex by molar ratio and molar conductivity measurements. The complex shows λmax at 486 nm with a molar absorptivity 0.3299 x 104 L.mo1-1.cm-1 and Sandell’s sensitivity 0.0177μg.cm-2.Beer’s law is obeyed in the concentration range (0.5-7.6μg.mL-1) of Ni (II) with excellent linearity depicted by correlation coefficient value of 0.9995 with a detection limit of 0.1927μg.ml-1. Recovery and relative error values of precision and accuracy of method were found to be R.S.D.% = 0.39221, Re=98.7% and Erel = -1.3% . The nature of the complex showed that (M:L) ratio was 1:2. This method was applied for the determination of Ni(II) in alloy due to Sensitive, accurate, and rapid spectrophotometric method. The results obtained were compared with the flame atomic absorption spectrometry method, and results are in conformity.

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“…However, usually considering the type of surfactant, non-ionic surfactants appear to be better solubilizing agents as they most often have a lower critical micellar concentration, are less toxic, and are very effective at low concentrations [ 20 ]. It has been proven, however, that the use of a mixture of non-ionic and ionic surfactants increases the extraction efficiency of polar organic compounds [ 36 ]. When hydrocarbons or weakly polar molecules with a long hydrophobic chain are solubilized, the yield tends to increase with the increasing length of the hydrophobic surfactant chain.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Nanomicellar Extraction of Polyphenols—Methodology and Applications Review

Śliwa

2021

IJMS

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The selection of the appropriate extraction method is crucial, especially for the receiving of active substances from plant material. The extraction using supercritical liquids and micellar-mediated extraction (MME) is the most advantageous among the alternative methods to classical solid–liquid extraction. However, the latter seems to be the best solution when the desired actives are polar. The following article presents a comprehensive review of the micellar-mediated extraction method in the last decade. The theoretical principle of the process was also refreshed and the current state of knowledge on the applications for analytical and manufacturing purposes was summarized.

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Spectrophotometric Determination of Trace Amounts of Cu (II) in Water Samples after Micelle-Mediated Extraction

Cited by 4 publications

References 0 publications

The Accumulated Effect of the Number of Ethylene Oxide Units and/or Carbon Chain Length in Surfactants Structure on the Nano-Micellar Extraction of Flavonoids

The Accumulated Effect of the Number of Ethylene Oxide Units and/or Carbon Chain Length in Surfactants Structure on the Nano-Micellar Extraction of Flavonoids

Determination of Ni(II) in Alloy by Spectrophotometric Method with a new Chromogenic Reagent (IDPBS)

Nanomicellar Extraction of Polyphenols—Methodology and Applications Review

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