Determination of carrageenan by means of photometric titration with Methylene Blue and Toluidine Blue dyes

Ziółkowska, Dorota; Kaniewska, Agnieszka; Lamkiewicz, Jan; Shyichuk, Alexander

doi:10.1016/j.carbpol.2017.02.029

Cited by 24 publications

(24 citation statements)

References 24 publications

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“…In another measuring variant, an immersion sensor Optrode (Metrohm, Herisau, Switzerland) working at 574, 610 and 660 nm was used as an alternative to the external sensor. Both data acquisition and burette control were carried out using custom software ChemiON written by Jan Lamkiewicz (Ziółkowska et al, 2017(Ziółkowska et al, , 2018a.…”

Section: Methodsmentioning

confidence: 99%

Determination of Sodium Dodecyl Sulfate via Turbidimetric Titration with Poly(Diallyldimethylammonium Chloride)

Ziółkowska

Lamkiewicz

Shyichuk

2020

J Surfact & Detergents

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Titration of sodium dodecyl sulfate (SDS) solution with poly(diallyldimethylammonium chloride) (PDDA) results in the formation of colloidal dispersion and gradual increase of turbidity. The titration end point can be determined in different ways, depending on both titrant concentration and optical detector used. The maximum value of turbidity depends on concentration of the titrant solution. An immersion probe is applicable to measure turbidity changes only at low concentrations of the colloidal dispersion. An external optical sensor is well suitable at both low and high concentrations of PDDA titrant. Near to the equimolar ratio of the analyte and titrant, large floccules are formed and turbidity values undergo chaotic fluctuations. Calibration graphs for SDS determination are straight lines. Determination range is from 0.2 to 40 mg L−1.

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Section: Methodsmentioning

confidence: 99%

Determination of Sodium Dodecyl Sulfate via Turbidimetric Titration with Poly(Diallyldimethylammonium Chloride)

Ziółkowska

Lamkiewicz

Shyichuk

2020

J Surfact & Detergents

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“…Measurement of carrageenans in the presence of proteins was performed using a slight modification of a method described elsewhere . Carrageenans were prepared at concentrations ranging from 200 to 3.125 μg × mL −1 in H 2 O (10 μL sample in H 2 O + 10 μL H 2 O) and at the same concentrations in culture medium containing either 10% fetal bovine serum (FBS) (10 μL sample in H 2 O + 10 μL medium) or casein (10 μL sample in H 2 O + 10 μL casein, C = 10.0 mg × μL −1 ).…”

Section: Methodsmentioning

confidence: 99%

Effect of carrageenans alone and in combination with casein or lipopolysaccharide on human epithelial intestinal HT‐29 cells

Sokolova

Kuzmich

Byankina

et al. 2017

J Biomedical Materials Res

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The research described here was focused on the effect on human intestinal epithelial cell monolayers of sulfated red algal polysaccharides (κ-, λ-, and κ/β-carrageenans) alone and in combination with casein or lipopolysaccharide (LPS). HT-29 cells were investigated under normal and stress conditions; stress was induced by exposure to ethanol. Cell viability was monitored with a real-time system. The change in binding properties of negatively sulfated red algal polysaccharides assessed by the measurement of free carrageenans in mixtures with casein or McCoy's 5 A culture medium by means of toluidine blue O. Low sulfate content and the presence of 3,6-anhydogalactose are prerequisites for the recovery of ethanol-exposed HT-29 cells by carrageenans. Analysis of carrageenan binding ability confirmed that casein and LPS should affect carrageenan activity. Whether the combined action of the mucin-containing layer and carrageenans or the action of carrageenans alone was responsible for enhanced cell viability under stress conditions induced by ethanol is a subject for further research. © 2017 Wiley Periodicals Inc. J Biomed Mater Res Part A: 105A: 2843-2850, 2017.

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“…The Freundlich isotherm implies a multilayer adsorption and heterogeneous distribution of the binding sites onto an adsorbent surface. The linear form of the Freundlich isotherm is given by equation (12) [33,34]:…”

Section: Adsorption Isotherms Studymentioning

confidence: 99%

“…The absorption spectrum of MB in the visible range of the electromagnetic spectrum presents a main band centered on 665 nm, which is related to single molecules of MB and gives a blue coloration to MB aqueous solutions. However, it has been described in the literature that, upon contact with certain materials, MB aqueous solutions change their color from blue to a purple hue [9][10][11][12]. This color change phenomenon is called metachromasy (also called metachromasia) [13,14], and in the case of MB, the color change is accompanied by the appearance of a new absorption band at lower wavelength, around 560 nm, which can be explained by the formation of MB aggregates higher than MB dimers.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Thermodynamic Study of Methylene Blue Adsorption onto Chitosan: Insights about Metachromasy Occurrence on Wastewater Remediation

Kellner-Rogers¹,

Taylor²,

Masud³

et al. 2018

Preprint

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<p>Methylene Blue (MB) is a dye frequently used in the textile industry and a potential wastewater pollutant. MB adsorption onto the surface of solid materials is a promising method for wastewater remediation. The biopolymer chitosan is one of the promising candidates as an adsorbent for MB removal from wastewater. However, the contact between MB and chitosan induces the aggregation of MB molecules. The formation of MB aggregates can lead to an appearance of additional bands in the MB visible absorption spectrum. This phenomenon is called metachromasy. In this paper, chitosan was used as adsorbent to study the kinetics and thermodynamic parameters related to the elimination of MB as single molecules (Sng-MB) and aggregates (Agg-MB) species from simulated wastewater. It was found that, for MB single molecules or aggregates, the adsorption process follows the pseudo second order adsorption kinetics model. For each temperature studied, Agg-MB always presented higher rate constant than Sng-MB, indicating a faster adsorption of Agg-MB in comparison to Sng-MB. Additionally, the adsorption process presented a lower activation energy for Agg-MB, indicating Agg-MB adsorption is favored in relation to Sng-MB. The thermodynamic studies indicated the adsorption process for both MB species is endothermic and spontaneous from 298 to 348 K. The adsorption isotherms could be properly fitted and interpreted according to Temkin and Dubinin-Radushkevich models. Studies varying the initial pH of MB solution indicated that metachromasy could be suppressed in acidic pH values, whereas alkaline pH values led to an increase in the removal percentage of Sng-MB and Agg-MB in relation to neutral conditions. The analysis of chitosan powder before and after adsorption indicated the adsorption process does not cause structural changes to the chitosan. The kinetic and thermodynamic study of the relative adsorption of MB single molecules and aggregates onto chitosan can provide fundamental information for MB wastewater remediation.</p>

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Determination of carrageenan by means of photometric titration with Methylene Blue and Toluidine Blue dyes

Cited by 24 publications

References 24 publications

Determination of Sodium Dodecyl Sulfate via Turbidimetric Titration with Poly(Diallyldimethylammonium Chloride)

Determination of Sodium Dodecyl Sulfate via Turbidimetric Titration with Poly(Diallyldimethylammonium Chloride)

Effect of carrageenans alone and in combination with casein or lipopolysaccharide on human epithelial intestinal HT‐29 cells

Kinetic and Thermodynamic Study of Methylene Blue Adsorption onto Chitosan: Insights about Metachromasy Occurrence on Wastewater Remediation

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