Voltammetric sensor for simultaneous determination of p-phenylenediamine and resorcinol in permanent hair dyeing and tap water by composite carbon nanotubes/chitosan modified electrode

p-Phenylenediamine (PPD) and resorcinol (RSN) are hair dye precursors of permanent dyeing more used worldwide. The present work describes a simple and economic voltammetric sensor for simultaneous determination of both components in commercial hair dyeing and tap water at low concentrations. PPD and RSN are oxidized at + 0.17 and + 0.61 V vs. Ag/AgCl at glassy carbon electrode coated by composites of multiwall carbon nanotubes with chitosan (MWNTs-CHT/GCE), which anodic currents density normalized are 10% and 70% higher in relation to the unmodified electrode, respectively. The calibration curve for simultaneous determination of PPD and RSN showed linearity between 0.55 and 21.2 mg L-1 with detection limits of 0.79 and 0.58 mg L-1 to PPD and RSN, respectively. The relative standard deviations found for ten determinations were of 0.73 and 2.35% to 2.70 mg L-1, and 0.87 and 1.08% to 15.96 mg L-1 to PPD and RSN, respectively. The voltammetric sensor was applied to determination of PPD and RSN in tap water and commercial hair dyeing samples and the average recovery for these samples was around 97%. The products generated from PPD and RSN reaction such as was p-quinonediimine and bandrowski base were detected by LC-MS/MS and UV-vis spectrophotometry. (C) 2014 Published by Elsevier B.V.

The oxidation of p-phenylenediamine, an ingredient used for permanent hair dyeing purposes, leads to the formation of hydroxyl radicals: oxidative stress and DNA damage in human immortalized keratinocytes

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Textile dyeing wastewaters : characterization and treatment /

Mode of access: Internet.

The dyeing of textile fabrics.

Includes index.

The dyeing of textile fabrics /

Includes index.

Aniline black and its applications in dyeing and printing /

Includes index.

The domestic manufacturer's assistant, and family directory, in the arts of weaving and dyeing: comprehending a plain system of directions, applying to those arts and other branches nearly connected with them in the manufacture of cotton and woolen goods; including many useful tables and drafts, in calculating and forming various kinds and patterns of goods. Designed for the improvement of domestic manufactures.

Mode of access: Internet.

A manual of dyeing: for the use of practical dyers, manufacturers, students, and all interested in the art of dyeing.

Paged continuously.

Cyclopedia of textile work; a general reference library on cotton, woollen and worsted yarn manufacture, weaving, designing, chemistry and dyeing, finishing, knitting, and allied subjects.

"Authorities consulted" in each volume.

A treatise on printing and dyeing silks : shawls, garments, bandanas, and piece goods, in the different colours /

Spine title: McKernan on printing and dyeing silks.

Elements of the art of dyeing and bleaching /

Spine title: Dyeing & bleaching.

Colouring matters for dyeing textiles; with numerous engravings and diagrams,

"The matter has been revised and brought up to date by Mr. A. R. Foster."--Pref.

Textile colorist. A monthly journal devoted to practical dyeing, bleaching, printing and finishing, dyes, dyestuffs and chemicals as applied to dyeing.

Title varies slightly.

The hardwood finisher, with rules and directions for finishing in natural colors and in antique, mahogany, cherry, birch, walnut, oak, ash, redwood, sycamore, pine and all other domestic woods. Also miscellaneous rules for filling, staining, varnishing, polishing, dyeing, gilding and bronzing; together with hints on the preparation of woodwork for the finisher.

Mode of access: Internet.