Fluorosilicate

Williams, W John

doi:10.1016/b978-0-408-71306-1.50014-6

Cited by 18 publications

(26 citation statements)

References 2 publications

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“…Moreover, in mentioned range 600-700 nm, the maximum of absorbance in all investigated amino modifiers occurs at 660 ± 10 nm (Figure 3). As seen on Figure 4, where on the left (with blue background) are values for blind samples and on the right (with orange background) are normal samples, curves constructed of absorbance values at 660 nm [20] in function of amount of dye have linearity shape with R 2 (variance) circa 0.99. All values of R 2 of linear fitted curves for all investigated substances are shown in Table 1 while all measured data are shown in Table 2.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, methylene blue is treated as radical's indicator or interceptor for many years, for example, as a retarder of free-radical polymerization of acrylonitrile, methyl methacrylate, and styrene [18] or for rapid detection of hydroxyl radicals [19, 20]. In addition, methylene blue was used as a sensor to determine the total antioxidant potential (CPA) by photometric method, with respect to the hydroxyl radicals generated in the Fenton reaction [21].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Possibility and Conditions of Application of Methylene Blue to Determine the Activity of Radicals in Model System with Preaccelerated Cross-Linking of Polyester Resins

Hęclik

Duliban

Dębska

et al. 2019

International Journal of Analytical Chemistry

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Unsaturated polyester resins are usually processed using a curing system consisting of initiator and accelerator introduced into the resin. Actually, the producers apply built-in amine accelerators which can be named as preaccelerators. Commonly used preaccelerators for unsaturated resins are tertiary aromatic amines of which incorporation into resin structure may bring better stability. It also causes shorter gelation time of resins because of formation of active RO• radicals that initiate polymerization. Investigated radical reactions are too fast and there is no possibility of freezing it (in unsaturated polyester) to measure with Electron Paramagnetic Resonance (EPR). The analytical methodology on radicals activity measurement in model of preaccelerated unsaturated polyester resin reaction with methylene blue as indicator was presented. Using methylene blue as indicator allows us to determine the activity of forming radicals in three-component system (cobalt salt, amine preaccelerator, peroxide, or hydroperoxide) during the reaction of radicals generating. Changes in radicals activity using methylene blue as interceptor can be observed by changes of transmittance in the UV-Vis spectrum in the range 400-950 nm.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Possibility and Conditions of Application of Methylene Blue to Determine the Activity of Radicals in Model System with Preaccelerated Cross-Linking of Polyester Resins

Hęclik

Duliban

Dębska

et al. 2019

International Journal of Analytical Chemistry

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“…The quantitative determination of vanadate(V) ions and solid phase analysis was carried out analogously to the previous works. − Vanadate(V) ions in the acidic medium and in the presence of aqueous solution of H 2 O 2 , form the complex compounds V(O 2 )X 3 and/or V(O 2 )X 5 2– , where X is a monovalent anion. This reaction goes in the equimolar ratio according to eq . The relative standard deviation (RSD) of the analyses did not exceed 1%. …”

Section: Methodsmentioning

confidence: 98%

Solid Liquid Equilibria Studies in the KVO₃–KNO₃–H₂O System in the Temperature Range 293.15–323.15 K

2017

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Mutual solubility of potassium metavanadate and potassium nitrate(V) was investigated in the KVO3–KNO3–H2O system at the temperature range 293.15–323.15 K. The equilibrium studies were conducted using isothermal saturation of a solution method. On the base of the received results, a fragment of the solubility polytherm for the investigated system was plotted. The knowledge of the course of that isotherm for the ternary system is necessary to plot the equilibrium diagram in a planar projection prepared according to the Jänecke method for the systems of exchange salts NH4NO3–KVO3–H2O and to determine optimal conditions for utilization of the postfiltration liquor from soda production with the soda–chlorine–saltpeter method.

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“…The concentration of bicarbonate ions was determined in a potentiometric titration of the sample using a standardized sulfuric(VI) acid solution. The determinations were performed using an automated Mettler Toledo DL50 titrator …”

Section: Methodsmentioning

confidence: 99%

Studies on Mutual Solubility of Salts in the NH₄HCO₃–(NH₄)₂SO₄–H₂O System

et al. 2019

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Mutual solubility of salts in a triple NH 4 HCO 3 −(NH 4 ) 2 SO 4 −H 2 O system was studied in the temperature range of 293.15−323.15 K. The tests were performed using the isothermal solution saturation method. The obtained results provided a basis for a graph depicting the partial solubility polytherm and for the determination of solubility plane equations for the studied system. The obtained experimental results and knowledge related to qualitative and quantitative relationships in a three-component system are required in order to specify the direction of further work on disposal methods of gypsum waste via carbonization. The obtained experimental results provide a physico-chemical basis for planning of separation and crystallization processes in the chemical industry.

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Fluorosilicate

Cited by 18 publications

References 2 publications

Analysis of the Possibility and Conditions of Application of Methylene Blue to Determine the Activity of Radicals in Model System with Preaccelerated Cross-Linking of Polyester Resins

Analysis of the Possibility and Conditions of Application of Methylene Blue to Determine the Activity of Radicals in Model System with Preaccelerated Cross-Linking of Polyester Resins

Solid Liquid Equilibria Studies in the KVO₃–KNO₃–H₂O System in the Temperature Range 293.15–323.15 K

Studies on Mutual Solubility of Salts in the NH₄HCO₃–(NH₄)₂SO₄–H₂O System

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Fluorosilicate

Cited by 18 publications

References 2 publications

Analysis of the Possibility and Conditions of Application of Methylene Blue to Determine the Activity of Radicals in Model System with Preaccelerated Cross-Linking of Polyester Resins

Analysis of the Possibility and Conditions of Application of Methylene Blue to Determine the Activity of Radicals in Model System with Preaccelerated Cross-Linking of Polyester Resins

Solid Liquid Equilibria Studies in the KVO3–KNO3–H2O System in the Temperature Range 293.15–323.15 K

Studies on Mutual Solubility of Salts in the NH4HCO3–(NH4)2SO4–H2O System

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Solid Liquid Equilibria Studies in the KVO₃–KNO₃–H₂O System in the Temperature Range 293.15–323.15 K

Studies on Mutual Solubility of Salts in the NH₄HCO₃–(NH₄)₂SO₄–H₂O System