Showing papers on "Sodium dichromate published in 1995"
01 Feb 1995-Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology
TL;DR: The results indicate that both Cr(VI) and Cr(III) induce an oxidative stress at equitoxic doses, while Cr( VI) induces greater oxidative stress in rats as compared with Cr( III) treated animals.
100 citations
01 Mar 1995-Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology
TL;DR: Chromium occurs in the workplace primarily in the valence forms Cr(III) and Cr(VI, and chronic sodium dichromate administration induces oxidative stress resulting in tissue damaging effects which may contribute to the toxicity and carcinogenicity of hexavalent chromium.
52 citations
TL;DR: It is concluded that L-band spectroscopy can indeed be effectively utilized for following the metabolism of Cr(V) in live mice and that Cr( V) formation can be controlled by utilizing cellular antioxidants in vivo.
30 citations
TL;DR: In this paper, the resistivity and temperature coefficient of resistors were measured for several candidate electrolytes, including aqueous solutions of copper sulfate, potassium dichromate, and aluminum sulfate.
Abstract: Aqueous‐electrolyte resistors were developed for use as dummy loads in pulsed power systems. These resistors are simple, robust, low‐inductance devices capable of operation at high voltage and high current, and may be used to dissipate large pulse energies without catastrophic failure. The resistivity and temperature coefficient of resistivity were measured for several candidate electrolytes, including aqueous solutions of copper sulfate, potassium and aluminum sulfate, potassium dichromate, silver nitrate, sodium dichromate, and sodium thiosulfate. The resistivity of potassium dichromate solution is expressed by the power law ρ(Ω cm)=1640 C−1.0942 for electrolyte concentrations in the range C=0.025–25 g/l. The temperature coefficient of resistivity is in the range (1/ρ)(∂ρ/∂Ts)=−(0.01–0.03)/°C for typical aqueous metal–salt electrolytes and is dependent on the solution temperature Ts and, to a lesser extent, on the electrolyte concentration. Aqueous solutions of potassium dichromate are compatible with b...
19 citations
TL;DR: In this article, Fourier transform infrared spectra of aqueous sodium chlorate, perchlorate, and dichromate solutions were obtained using multivariate spectral reconstruction and spectral subtraction.
Abstract: Infrared spectra of single and mixed aqueous sodium chlorate, sodium perchlorate and sodium dichromate solutions were recorded using Fourier transform infrared spectrometry. With the aid of spectral subtraction and multivariate spectral reconstruction, clear spectra of these salts, in the spectral region 900–1250 cm–1, were obtained. The features of these spectra include maximum absorption bands at 973 cm–1, 1110 cm–1 and 950 cm–1 due to chlorate, perchlorate and dichromate, respectively. In mixed solutions these salts could be detected at concentrations as low as 0.64 g l–1. The linear dynamic range was found to be 0.2–63.8 g l–1, 0–73.47 g l–1 and 0–149 g l–1 for chlorate, perchlorate and dichromate, respectively. The results obtained in the analysis of industrial samples compared well with certified values. Interference effects of different inorganic salts were studied. Sodium salts of bromide, iodate, carbonate, chloride, nitrate, and hydrogencarbonate were found to have no significant interference. Standard deviations of industrial sample determinations were found to be in the range of 2.5–4.10%.
6 citations
Patent•
08 Mar 1995
TL;DR: In this paper, 300-400 g/l solution of sodium dichromate containing two crystalline water molecules undergoes reducing reaction with sulphur dioxide under room temp. to 80 deg.C.
Abstract: This invented technological process is as follows: 300-400 g/l solution of sodium dichromate containing two crystalline water molecules undergoes reducing reaction with sulphur dioxide under room temp. to 80 deg.C, further sodium dichromate solution is used to oxidize excessive sulphur dioxide in alkaline chromium sulphate under 80 deg.C to boiling temp., and then it is spray-dried under 100-160 deg.C. The product of this method has high quality, fully utilizes the burning heat of sulphur, saves energy so that tail gas containing microdust of alkaline chromium sulphate is purified and recovered for the sake of preventing environmental pollution and lowering product cost.
3 citations
Patent•
06 Jan 1995TL;DR: In this article, a process for the low-waste production of sodium dichromate from the mineral chromite with simultaneous recovery of low-carbon ferrochromium is described.
Abstract: The invention relates to a process for the low-waste production of sodium dichromate from the mineral chromite with simultaneous recovery of low-carbon ferrochromium.
2 citations