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(mū-rek'sīd, -sid),
The ammonium salt of purpuric acid, formerly used as a dye but superseded by the aniline colors.
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In the zinc or copper chelating assay, the chelator were able to capture the ions and inhibit the formation of [Zn.sup.2+] or [Cu.sup.2+-] murexide complex which has an absorption maximum at 462 nm where the low absorbance indicate a high chelating activity.
According To [12] this results due to the presence of propionate and iso-butyrate (fatty acids with short aliphatic chain).where propionic acid and isobutyric acid cheeks the role of electron donors and transforms the ferrous or ferric iron is therefore inhibits the formation of the complex ferrous-ferrozine [2], as these fatty acids have the ability to form complex with copper and zinc faster than murexide.
For Ni analysis, 10 mL of the bath solution, 100 mL distilled water, 5 ml ammonia, and approximately 0.5 g murexide (99.0 %) were placed in an Erlenmeyer flask.
Murexide was used as an indicator for CuCl2.2H2O, CoCl2.6H2O and NiCl2.2H2O solutions (1.7x102 mol L1 each).
During the titration, murexide indicator was used for CoA, NiA, and CuA and Methyl thymol blue for BaA samples [14].
Sodium hydroxide, silver chloride, silver nitrate, sodium chloride, potassium chloride, lithium chloride, HCl, HNO3, HClO4, KOH, BaCl2, NH4SCN, hydrogen peroxide, sodium dihydrogen phosphate, KH2PO4, folin ciocalteu reagent, vanadomolybdate reagent, quercetin, gallic acid, murexide, erichrome black T, ninhydrin, EDTA, gum acacia, dichloromethane, methanol, chloroform, DMSO, acetone, starch and sucrose were of analytical grade.
Calcium and magnesium in the plant material was estimated with standard salt of EDTA by using Murexide and Erichrome Black T indicators.
In the present study, urea modified rice husk has been used for removing Brilliant Vital Red and Murexide form water in an efficient way.
Keywords: Adsorption, Brilliant Vital Red, Murexide, rice husk, Urea Modification, Isotherms.
It is already reported as an efficient adsorbent for removing textile dyes such as Malachite Green, Congo red, Methylene Blue, Murexide, Brilliant Vital Red and Acid Yellow 36 in raw form [11-17].
Summary: The adsorption of Murexide from aqueous solution onto the Pomegranate bark was investigated at room temperature.
The adsorption of Murexide was also studied at different pH, which presented that low pH was favorable for the removal of color material from aqueous solution.