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: Two analytical techniques are described which have been adapted to industrial hygiene purposes for determining microgram quantities of airborne vapors of diethanolamine, 2-methylaminoethanol, and 2-diethylaminoethylene, and a pink color is determined spectrophotometrically.
Abstract: Two analytical techniques are described which have been adapted to industrial hygiene purposes for determining microgram quantities of airborne vapors of diethanolamine, 2-methylaminoethanol, and 2-diethylaminoethanol. The first two of these materials are secondary amines, and are oxidized with potassium dichromate; the residual unreduced dichromate is then reacted with 1,5-dipheuylcarbohydrazide to form a pink color which is determined spectrophotometrically. The 2-diethylaminoethanol, a tertiary amine, is collected in water, extracted with ethylene dichloride, and then reacted with methyl orange to form a complex which breaks up in acid solution to again produce a color which may be read on a spectrophotometer.
3 citations
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06 Aug 2014
TL;DR: In this article, the authors proposed a method for detecting organic carbon in plants and soil and a heating device of the method. And the method is safe, environmentally friendly, high in detection reproducibility, accurate and efficient.
Abstract: The invention relates to a detection method and in particular relates to a method for detecting organic carbon in plants and soil and a heating device of the method The method for detecting organic carbon in plants and soil comprises the following steps: pretreating a plant sample or a soil sample, mixing the pretreated plant sample or the pretreated soil sample, potassium dichromate solution and concentrated sulfuric acid solution in a triangular flask, heating to carry out oxidizing reaction, adding distilled water after the reaction is ended, cooling and adding phenanthroline solution as an indicator, titrating the residual potassium dichromate in the oxidizing reaction by using ferrous sulfate solution, and calculating the content of organic carbon, wherein the oxidizing reaction refers to reaction under the condition of normal pressure steam generated by water at the temperature of 90-100 DEG C for 20-60 minutes The normal pressure steam heating method is simple to operate and easy to control, the temperature in a water bath kettle is stable and easy to control, the sample is uniformly heated and fully digested, and the method is safe, environmentally friendly, high in detection reproducibility, accurate and efficient
3 citations
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18 Aug 2017
TL;DR: In this paper, the content of activated brownish black humic acid and activated fulvic acid is determined by a method of dissolution of citric acid-sodium citrate mixing fluid, acid settlement, filter liquid resin absorption, NaOH absorption, and potassium dichromate oxidization.
Abstract: The invention provides a determination method of activated humic acid, and particularly relates to an activated humic acid content determination method of humic acid composite fertilizer, humic acid compound fertilizer, and humic-acid-contained compound fertilizer; the activated humic acid includes activated brownish black humic acid and activated fulvic acid, wherein the content of the activated brownish black humic acid is determined by a method of dissolution of citric acid-sodium citrate mixing fluid, acid settlement, alkali dissolution, and then by potassium dichromate oxidization; the content of activated fulvic acid is determined by a method of dissolution of citric acid-sodium citrate mixing fluid, acid settlement, filter liquid resin absorption, NaOH absorption, and potassium dichromate oxidization; the sum of the tested contents of activated brownish black humic acid and activated fulvic acid is the content of humic acid. The method has the advantages of being simple in operation, high in accuracy, and capable of meeting the operation demand of the most enterprises and quality inspection units while controlling the testing bias well.
3 citations
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TL;DR: In this paper, the authors evaluated hepatotoxicity induced by potassium dichromate in chickens via drinking water and found that the liver cells of the liver treated with Cr(VI) were severely dilated and the liver appeared severe inflamed and necrotic.
Abstract: Article history Received: 19 Apr, 2015 Revised: 22 May, 2015 Accepted: 24 May, 2015 Abstract This study evaluated hepatotoxicity induced by potassium dichromate in chickens via drinking water. Seventy-two Hyland Brown male chickens were randomly divided into 4 groups (18 chickens each group): Control group, low-dose (2%LD50) Cr(VI) group, middle-dose (6%LD50) Cr(VI) group, high-dose (10%LD50) Cr(VI) group. Potassium dichromate was given orally via drinking water to the chickens for 42 day. The control group was treated with the same volume of distilled water. Blood biochemical indexes (ALT, AST, GGT), antioxidant indicators (SOD, GSH and MDA) in liver homogenates and pathologic changes in tissues were detected at 14, 28 and 42 day respectively. The levels of serum biochemical indexes (ALT, AST, GGT) increased significantly (P<0.05) in Cr(VI)-treated groups. The activities of SOD and GSH decreased significantly (P<0.05) in the Cr(VI)-treated groups while the content of MDA increased significantly (P<0.05) in the Cr(VI)-treated groups compared to control with the increasing dose and time. The cells of the liver treated with Cr(VI) were severely dilated and the liver appeared severe inflamed and necrotic. The results indicated that Cr(VI) can lead to hepatotoxicity damage in chicken with time and dosedependent relationship.
3 citations