Showing papers on "Potassium dichromate published in 1986"
TL;DR: It is concluded that NAC may be useful in intoxications due to chromate and borate and is effective at reversing the oliguria associated with these intoxicants.
111 citations
TL;DR: X-Band EPR studies on aqueous solutions of potassium dichromate and gamma-L-glutamyl- L-cysteinylglycine (reduced glutathione) at pH 6-8 have shown the formation of several relatively long-lived chromium(V) species.
102 citations
TL;DR: Penicillium sp. mycelium can accumulate Pb from aqueous solutions of nitrate as mentioned in this paper, but the maximum quantity bound remained unchanged, even after heat treatment.
Abstract: Penicillium sp. mycelium can accumulate Pb from aqueous solutions of nitrate. Uptake of Pb by mycelial preparations after heat treatment was more rapid, but the maximum quantity bound remained unchanged. Chromium was not accumulated from solutions of potassium dichromate unless the mycelial preparation was first incubated in Pb nitrate. In the example given, 0.14 g of dry mycelium incubated in Pb nitrate (50 ppm, 2 hr) contained 850 gg of Pb and subsequently accumulated 120 μg of Cr in 5 min from 20 mL of 20 ppm dichromate solution.
30 citations
TL;DR: In this paper, the determination of total tin in water samples by graphite-furnace atomic absorption spectrometry is described, and a matrix modifier containing 0.4% (w/v) potassium dichromate and 0.2% ammonium dihydrogenphosphate in 2% nitric acid is proposed.
24 citations
TL;DR: The treatment of rats with single subcutaneous doses of mercuric chloride plus potassium dichromate resulted in greater effects on water consumption, urine volume, body weight, and urinary electrolyte excretion than produced by mercurIC chloride alone.
8 citations
TL;DR: Gel chromatography of the cytosol showed that most of the chromium was in fractions with an apparent molecular weight of 6000 Da and absorption maxima at 410 nm and 548 nm, similar optical properties and molecular weight are characteristic of GSH-Cr complexes formed by reaction of Cr(VI) with GSH in vitro.
Abstract: 1. The uptake of potassium dichromate in the isolated perfused rat liver was almost complete after one hour of perfusion. No significant sex differences in chromium distribution were observed.2. At the end of the experiments (one hour), about 60% of the applied Cr(VI) dose (312 μg Cr/liver) was located in the cytosol, 14% was in the mitochondria, 9% in the microsomal pellet and 2% was associated with the nuclei.3. Gel chromatography of the cytosol showed that most of the chromium was in fractions with an apparent molecular weight of 6000 Da and absorption maxima at 410 nm and 548 nm. Similar optical properties and molecular weight are characteristic of GSH-Cr complexes formed by reaction of Cr(VI) with GSH in vitro
7 citations
TL;DR: It was analyzed the genetic effects of potassium dichromate and chromium trioxide in Drosophila melanogaster males treated with different concentrations of the salts and found K2Cr2O7 was less toxic than CrO3.
Abstract: It was analyzed the genetic effects of potassium dichromate and chromium trioxide in Drosophila melanogaster males treated with different concentrations of the salts. K2Cr2O7 was less toxic than CrO3.Potassium dichromate induced sex-chromosome loss and non-disjunction at the highest concentration employed (400 ppm) while chromium trioxide did not showed these effects.Both salts induced sex-linked recessive lethal mutations.
6 citations
TL;DR: Sulfur dioxide was found to reduce a number of first-row transition-metal compounds in molten ternary sulfate eutectic, the ease of reduction being Cr(VI) > Mn(IV) > Fe(III) > Cu(II) as discussed by the authors.
Abstract: Sulfur dioxide was found to reduce a number of first-row transition-metal compounds in molten ternary sulfate eutectic, the ease of reduction being Cr(VI) > Mn(IV) > Fe(III) > Cu(II). A number of other, probably polymeric, cations (Ti(IV), Nb(V), Mo(VI), Ta(V), W(VI)) were not reduced. Potassium dichromate was unstable, slowly decomposing to chromium(III) oxide, chromate, and oxygen, and was converted to chromate by solutions of sodium carbonate. Chromium metal was little attacked by the ternary eutectic, but copper metal reduced copper(II) to copper(I) cations. Solutions of potassium pyrosulfate decomposed thermally but also oxidized chromium metal (to Cr(III)) and iron(II) (to Fe(III)) and reduced manganese(IV) oxide (to Mn(II)) and chromium(VI) (completely to chromium(III)). Though simple cations (Fe(II), Mn(II)) accelerated the thermal decomposition of pyrosulfate, the more polymeric cations (Ti(IV), Nb(V), Mo(VI), Ta(V), W(VI)) caused considerably less evolution of sulfur trioxide. 25 references, 4 figures, 3 tables.
6 citations
TL;DR: The concentration homogeneity of nickel sulphate 4.8% pet and potassium dichromate 0.5% pet in patch test materials appeared to become less homogeneous if stored at room temperature compared to storage at 4 degrees C, after 2 months as mentioned in this paper.
Abstract: The concentration homogeneity of nickel sulphate 4.8% pet. and potassium dichromate 0.5% pet. in patch test materials appeared to become less homogeneous if stored at room temperature compared storage at 4 degrees C, after 2 months. The coefficient of variation of concentration for nickel sulphate after storage at 4 degrees C was 3.0883%, and at room temperature 25.3098%. The coefficient of variation for potassium dichromate after storage at 4 degrees C was 4.6324% and at room temperature 9.6334%. This indicates that patch test materials containing nickel sulphate and potassium dichromate should be kept refrigerated in the tropics.
3 citations
TL;DR: In this paper, the effect of pressure on neutron irradiated potassium chromate and potassium dichromate has been studied and the retention was found to increase with pressure in both salts, mainly at the expense of DP precursors.
Abstract: The effect of pressure on neutron irradiated potassium chromate and potassium dichromate has been studied. The retention was found to increase with pressure in both salts, mainly at the expense of DP precursors. Thermal annealing studies in samples which prior to heating had been compressed were also made.
2 citations
Patent•
31 Jul 1986
TL;DR: In this article, the waste water is first chemically freed from substances interfering with the preparation of potassium dichromate, and then prepurified waste water was treated with amines, and the chromate was removed from the waste waste water in the organic phase of a solvent extraction process.
Abstract: The waste water is first chemically freed from substances interfering with the preparation of potassium dichromate. The prepurified waste water is treated with amines. The chromate is eliminated from the waste water in the organic phase of a solvent extraction process. From this organic phase, the chromate is re-extracted with aqueous sodium hydroxide. In the re-extract the potassium dichromate is then formed by the addition of a potassium carrier and is removed from the residual mother liquor.