Showing papers on "Brilliant green published in 1982"
TL;DR: Aqueous solutions of seven cationic triarylmethane dyestuffs can be titrated with sodium tetraphenylborate using as indicator electrode an aluminium wire coated with a PVC membrane plasticized with 2-nitrophenyl 2-ethylhexyl ether or tricresylphosphate Titrations are possible in unbuffered and buffered media within the pH range 4-10 Characteristic titration data are given for determinations of malachite green B, seto- glaucin 0, brilliant green, fuchsine, methyl violet
14 citations
TL;DR: In this paper, a comprehensive series of mono-and di-substituted derivatives of Brilliant Green has been prepared and the various electronic absorption spectra have been determined, showing that substitution in the 2-position leads to a pronounced increase in the intensity of the long-wavelength band.
Abstract: A comprehensive series of mono- and di-substituted derivatives of Brilliant Green has been prepared and the various electronic absorption spectra have been determined. Substituents in the 3- or 4-position have little effect on the intensity of the first band, but the wavelength of maximum absorption is shifted to an extent which is linearly related to the appropriate Hammett substituent constant. Substitution in the 2-position leads to a pronounced increase in the intensity of the long-wavelength band.
10 citations
TL;DR: In this article, rate constants have been measured for the reactions of hydroxide ion with the following derivatives of Brilliant Green in aqueous solution: 3-X (X = Cl, OMe, CF3, Me, NO2, NMe2, or NME2).
3 citations
TL;DR: In this paper, a one-phase, one-reagent, spectrophotometric technique was proposed for the detection and determination of anionic surfactants of the sulfonate and sulfate types.
2 citations
Journal Article•
TL;DR: Patch tests in 215 patients having contact dermatitis due to local antibacterial agents, revealed 18 patients having positive patch tests with 1% aqueous brilliant green and one patient with 1%, and the vaule of TCH differed widely in different patients.
Abstract: Patch tests in 215 patients having contact dermatitis due to local antibacterial agents, revealed 18 patients having positive patch tests with 1% aqueous brilliant green and one patient with 1% aqueous gentian violet. Twelve of the patients having positive patch tests with brilliant green were tested again with increasing dilutions of brilliant green to ascertain the titre of contact hypersensitivity (TCH), i. c. the highest dilution or the lowes I t concentration of brilliant green giving a positive patch test in the patient. The vaule of TCH differed widely in different patients, the lowest concentration giving a positive patch test being 0.62% in two patients. Ten patients with positive patch tests were subjected to the usage test which consisted of painting 1% aqueous brilliant green on a normal skin area of the forearm twice daily for seven days. In four patients the usage test was positive.
2 citations
Patent•
25 Jan 1982TL;DR: In this paper, chromium-containing clinopyroxenes of the formula LixNa1-xCr(Si2O6) where x may be from 0 to 0.25 and from 0.6 to 1, and have only one reflectance peak.
Abstract: They are based on chromium-containing clinopyroxenes of the formula LixNa1-xCr(Si2O6) where x may be from 0 to 0.25 and from 0.6 to 1, and have only one reflectance peak.
1 citations