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n.1.(Chem.) A crystalline nitrogenous substance (C8H8N6O6, 5-5'-nitrilodibarbituric acid monoammonium salt) having a splendid dichroism, being green by reflected light and garnet-red by transmitted light. It was formerly used in dyeing calico, and was obtained in a large quantities from guano. It is now synthesized from alloxan. Formerly called also ammonium purpurate.
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After decomposition of the metal complex in hot concentrated nitric acid and neutralization of the reaction medium the resulting metal ions were determined complexmetrically using EDTA and murexide or Eriochrome Black T (EBT) indicator system.
Determination of Calcium using Murexide as an Indicator The determination of Ca in the sample was based upon the principle of titration.
The chelating activity of zinc ions for P australis leaf extracts solution 1mg/ml or 10mg/ml in DMSO for Zn and Cu chelating activity respectively was measured by the method of murexide described by Watak and patil, (2012) with slight modification.
5 endpoint), total hardness (versenate titration to eriochrome black-T endpoint) and calcium hardness (precipitation of magnesium followed by versenate titration to the murexide endpoint).
Analysis of urates: The white substance accumulated in the pericardium was collected and analyzed via the Murexide Test.
Amount of Ca and Mg was determined by titration method using murexide and Eriochrome black T indicator respectively.
Removal of Murexide (Dye) from Aqueous Media using Rice Husk as an Adsorbent.
The phosphorus contents in SBF solutions were determined with a UV mini 1240 spectrophotometer (SHIMADZU) as reported by Murphy and Riley [16], and the calcium concentration was determined by volumetric titration using NaOH, Murexide and EDTA (from Aldrich).
The murexide test differentiates urate deposits and calcium deposits.
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.
In the present study, urea modified rice husk has been used for removing Brilliant Vital Red and Murexide form water in an efficient way.