Topic
Potassium dichromate
About: Potassium dichromate is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 18967 citations. The topic is also known as: Potassium dichromate(VI) & Chromium potassium oxide.
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TL;DR: Results show that the administration of a single intraperitoneal dose of potassium dichromate decreased the activity of gamma-glutamyl transpeptidase and alanine aminopeptid enzyme enzymes in urine.
Abstract: It has been reported that potassium dichromate–induced nephrotoxicity is evidenced by diminution in creatinine clearance, increase in urinary protein, and structural damage to the proximal tubules. Damage to tissue often leads to the release of enzymes from the injured cells into the extracellular fluids. The aim of this study was to establish whether potassium dichromate induces changes in the urinary-specific activities of gamma-glutamyl transpeptidase and alanine aminopeptidase enzymes. Our results show that the administration of a single intraperitoneal dose of potassium dichromate decreased the activity of such enzymes in urine.
2 citations
TL;DR: In this paper, a colorimetric method of estimating the degree of sealing of anodic oxide films on aluminium has been developed, which is suitable for assessing films sealed in salt solutions such as nickel acetate and is apparently sensitive to the effects of ageing of the oxide film.
Abstract: A colorimetric method of estimating the degree of sealing of anodic oxide films on aluminium has been developed. Sealing in dichromate or chromate solutions may be followed directly by dissolving the anodic film in sodium hydroxide solution, acidifying with sulphuric acid and determining the chromium in the resulting solution with diphenylcarbazide. For other sealing electrolytes, the partially sealed film is treated for a standard time in potassium dichromate solution (‘post-sealing’) before dissolution and estimation.
In dichromate sealing, chromium uptake continues for long periods at all temperatures and any simultaneous hydration does not rapidly produce pore plugging. The post-sealing estimation technique is shown to be sensitive to anodising and sealing variables for water sealing. The results support a mechanism of sealing involving some pore closure from the sides with more extensive plugging near the outer surface. The test also appears suitable for assessing films sealed in salt solutions such as nickel acetate and is apparently sensitive to the effects of ageing of the oxide film. It is concluded that it is the most appropriate of the absorptiometric and colorimetric tests because it may be developed on a quantitative basis.
2 citations
01 Sep 1946
TL;DR: The results obtained by the potassium ferricyanide method are shown to agree more closely in calcareous soils than other methods with those obtained by a standard dry combustion method as mentioned in this paper.
Abstract: 1.
Potassium permanganate in acid medium is found to decompose on heating and the rate of decomposition increases with the period of boiling.
2.
A method for estimation of organic carbon in soil by oxidation with alkaline potassium ferricyanide solution is outlined.
3.
The results obtained by the potassium ferricyanide method are shown to agree more closely in calcareous soils than other methods with those obtained by the standard dry combustion method. Besides the method is more exact in view of its very sharp end-point.
2 citations
Patent•
08 Oct 2008
TL;DR: In this paper, a process method for the constant temperature chemical oxidation black dyeing of the iron nickel alloy for the optical instrument, which belongs to the process method of the black coloring of the metal surface treatment, is provided.
Abstract: The invention relates to a process method for the constant temperature chemical oxidation black dyeing of the iron nickel alloy for the optical instrument, which belongs to the process method of the black dyeing of the iron nickel alloy in the technical field of the metal surface treatment The invention solves the technical problems that the process method for the constant temperature chemical oxidation black dyeing of the iron nickel alloy for the optical instrument is provided The invention adopts the technical proposal that firstly, an operating tank and a hanging tool are made of ordinary steel material with low cost; secondly, the components of tank liquor comprises sodium hydroxide, sodium nitrite, potassium dichromate, sodium molybdate and trisodium phosphate, above all, the sodium hydroxide, sodium nitrite, potassium dichromate, sodium molybdate and trisodium phosphate are respectively dissolved with a small amount of tap water and then mixed, secondly, the tank liquor is supplied up to the volume with calculated amount; thirdly, the temperature elevation of the tank liquor is divided into two periods to be operated, and finally the temperature is set between 152 DEG C to 162 DEG C; fourthly, after oil removal and activating treatment, an oxidization operating workpiece is delivered into the tank to be oxidized for 1 to 3 hours; fifthly, after being washed and dried, the workpiece is closed to be processed, the cost of the black dyeing process is low, and the extinction effect is good
2 citations
TL;DR: Chloramine-B has been used as an oxidising agent to determine indirectly indirectly potassium iodate, potassium metaperiodate, Potassium dichromate, hydrogen peroxide, chloramine-T and potassium permanganate by a potentiometric method.
2 citations