Of indigo carmine

Mineralization of Indigo Carmine at Neutral pH Using a Nanocomposite as a Heterogeneous Photo-Fenton Catalyst... 

Bismuth Subcarbonate To 0.25 g add 20 ml DW, 0.05 ml indigo-carmine and then, as a single addition but with caution, 30 ml sulphuric acid. Titrate with indigo-carmine until a stable blue colour is produced. The volume of indigo carmine required is not more than that equivalent to 1 mg of N03 (0.4%). 

MAIN INTERMEDIATE PRODUCTS DETECTED DURING PHOTOCATALYTIC DEGRADATION OF INDIGO CARMINE AND INDIGO... 

NP Boley, NT Crosby, P Roper, L Somers. Determination of indigo carmine in boiled sweets and similar confectionery products. Analyst 106 710-713, 1981. 

Detection of Indigo Carmine and Artificial Organic Dyestuffs. 

If the wool is intensely coloured, tin presence of artificial organic dye or of indigo carmine is probable. In this case the operation is nqn-.ited in an add or alkaline bath according to which gives the more intensely coloured wool the colouring matter is then extracted from the w(x> and identified by the methods describ d for artificial organic dyes (.see Chapter XV). 

IgG (rabbit) Competitive immunoassay using ALP-labelled antibody at streptavidin-modified SPCEs bearing capture antibody Cyclic voltammetry of indigo carmine generated from 3-IP substrate —0.15 V (scan from —0.3 to +0.2 V) 5 x KT11 to 1 x 1(T9M 5 x 10 nM (7-Ongmr1) Diaz-Gonzalez et al. [83]... 

Pneumolysin Sandwich immunoassay with ALP or HRP labelled antibody using 3-indoxyl phosphate (3-IP) as substrate Cyclic voltammetric detection of indigo carmine (Ey 2 =-0.15 V)... 

Voltammetric detection of indigo carmine formed by ALP from 3-indoxyl phosphate... 

M. Diaz-Gonzalez, C. Fernandez-Sanchez and A. Costa-Garcia, Comparative voltammetric behaviour of indigo carmine at screen-printed carbon electrodes, Electroanalysis, 14 (2002) 665-670. 

Flox, C., Ammar, S., Arias, C., Brillas, E., Vargas-Zavala, A. V. and Abdelhedi, R. (2006) Electro-Fenton and photoelectro-Fenton degradation of indigo Carmine in acidic aqueous medium. Appl. Catal. B Environ. 67, 93-104. 

Acidify a portion of the sample with dilute sulphuric acid, and add 1 ml of a 1% solution of indigo carmine. A deep blue colour is given by chlorates. 

The use of an external indicator is somewhat tedious, but the titration can be simplified by using indigo carmine. This substance is readily decolorized by the available chlorine. A measured volume of arsenious oxide solution such as 25 ml, together with a little hydrochloric acid, are placed in a titration flask and a few drops of indigo carmine solution are added. The hypochlorite is then run in from a burette until the blue colour changes to a yellowish tinge. 

Clinical tests were also carried out with other dyes. The elimination of indigo carmine and azofuchsin S was markedly reduced in liver disease (A4, R16) but the converse was found with methylene blue (R21). Azorubin S was found to be removed from the plasma by the liver, but in... 

Kinetic spectrophotometric determination methods for Ag(I) were proposed, based on the strong catalytic effect of this ion on the controlled oxidation of various dyes, by measuring the rate of change of absorbance. Some recently published examples are Ag(I)-catalyzed peroxodisulfate oxidation of brilliant cresyl blue (33)104 or gallocyanine (34)105, both in the presence of 1,10-phenanthroline (35) and hexacyanoferrate (36) oxidation of indigo carmine (37)106. 

Dos Anjos, RS.C., Vieira, E.F.S., and Cestari, A.R. 2002. Interaction of Indigo carmine dye with chitosan evaluated by adsorption and thermochemical data. J. Colloid Interface Sci. 253 243-246. 

Several methods using colorimetric estimation of peroxides have been used for LOX assays, but none are generally suitable. The thiocyanate method (Koch et al., 1958) is very sensitive but nonstoichiometric (Axelrod, 1974). Iodide oxidation, much used for peroxide determinations on fats and oils, is not suitable for enzyme assays, but it has been used in spot tests for column fractions (Wallace, 1972) and for enzyme localization in disc gel electrophoresis (Guss et al., 1%7), although several laboratories have experienced poor results with the latter. deLumen and Kazeniac (1976) have reported that dimethoxybenzidine is better than potassium iodide or thiocyanate for gel staining. Drapron and Nicholas (1977) have proposed the use of indigo carmine oxidation as a simple method for LOX determination. 

An example of a case where the additive itself is electrochromic is the encapsulation of the redox indicator dye indigo carmine within a polypyrrole matrix (93,94). More recently, 3-D graphs have been constructed from absorbance data acquired during cyclic voltammetry. The enhancement and modulation of the color change on indigo carmine insertion into polypyrrole or polypyr-role/dodecylsulfonate films was shown (95). As expected, the use of indigo carmine as dopant improves the films electrochromic contrast ratio. 

The use of the Pt/GDE system with UVA irradiation, i.e., the PEF process, is illustrated in Fig. 2 for the treatment of clofibric acid with 1.0 mM Fe ". The much quicker TOC abatement with > 90 % mineralization at 360 min is due to the contribution of reactions (10) and (11). The photolysis of Fe(III)-oxalate by-products that are quite refractory to the OH-mediated oxidation is the crucial, distinctive event. For some pollutants, the efficiency of the PEF process can be further enhanced by using a metal ion cocatalyst. The action of Co ", Mn ", and Ag", among others, has been surveyed, but the most interesting effect has been demonstrated for the Cu VCu" couple. In the case of indigo carmine dye shown in Fig. 2, for example, the positive synergistic effect of Fe " and Cu " that promotes the quicker mineralization is accounted for by the easier oxidation of some nitrogenated complexes of Cu(II) (e.g., with oxamate) compared with the competitively formed Fe(III) complexes, which are more slowly removed by OH and can only be photodegraded. In this system, Cu" can be... 

Diamino-diphenylene oxide Catalytic acceleration of the oxidation of indigo carmine with 0.003 193... 

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