1961) measured barium in tissues gravimetrically following digestion of 15-20 grams of sample in a 2:1 (by volume) mixture of sulfuric and nitric acids. (cdc.gov)
Certain oxidizing agents produce a thin unreactive oxide layer on the metal, rendering it passive also to dilute mineral acids, such as sulfuric, nitric, or cold aqua regia. (mathisfunforum.com)
In the present study, sulfuric acid leaching of the cathode powder has been investigated with and without the addition of the reducing agent (H 2 O 2 ). (eeer.org)
Dilute1
Except a few less reactive metals (Cu, Hg, Ag, Au, Pt, etc) all metals react with dilute sulphuric acid and hydrochloric acid to produce salt and hydrogen gas. (edumple.com)
Regia3
Chlorine played an important role in the experiments conducted by medieval alchemists, which commonly involved the heating of chloride salts like ammonium chloride (sal ammoniac) and sodium chloride (common salt), producing various chemical substances containing chlorine such as hydrogen chloride, mercury(II) chloride (corrosive sublimate), and hydrochloric acid (in the form of aqua regia). (wikipedia.org)
Another important development was the discovery by pseudo-Geber (in the De inventione veritatis, "On the Discovery of Truth", after c. 1300) that by adding ammonium chloride to nitric acid, a strong solvent capable of dissolving gold (i.e., aqua regia) could be produced. (wikipedia.org)
Although aqua regia is an unstable mixture that continually gives off fumes containing free chlorine gas, this chlorine gas appears to have been ignored until c. 1630, when its nature as a separate gaseous substance was recognised by the Brabantian chemist and physician Jan Baptist van Helmont. (wikipedia.org)
React1
Recovery of barium from acid-digested tissues can be impaired when organic ions react with barium and interfere with the formation of the barium sulfate precipitate. (cdc.gov)
Temperatures2
At ordinary temperatures the metal shows no reaction to seawater or to wet or dry air. (mathisfunforum.com)
These acid digestion vessels also called as acid digestion bombs are variations of hydrothermal reactors used to dissolve or digest samples in various strong acids at higher pressures and temperatures. (amarequip.com)
Organic acid1
Most organic acid systems like acetic, formic, etc. (amarequip.com)
Digest1
The main advantages of these acid digestion vessels are superior extraction efficiency, speed, ability to analyse multiple elements including volatile elements, ability to digest large volumes of samples and reduced cost. (amarequip.com)
Species2
In the form of chloride ions, chlorine is necessary to all known species of life. (wikipedia.org)
In the +6 oxidation state, the most important species formed by chromium are the chromate, and dichromate, ions. (mathisfunforum.com)
Form2
They have a tendency to lose electrons and form positive ions. (edumple.com)
These ions form the basis for a series of industrially important salts. (mathisfunforum.com)
Concentration2
AMAR gives recommendation for material selection for particular media, however it does not guarantee 100% corrosion resistance of a particular material to a particular corrosive media, as the same depends on various parameters like temperature, pressure, concentration, etc. of the reactions. (amarequip.com)
The optimal process parameters with respect to acid concentration, addition dosage of H 2 O 2 , temperature, and the leaching time were found to be 2.0 M H 2 SO 4 , 4 vol. (eeer.org)
Metals2
Heavy metals are distributed throughout soil and sediment components and associated with them in various ways, including adsorption, ion exchange, precipitation and complexation and so on [ 2 ]. (intechopen.com)
An investigation of rare metals recovery from LiNi x Co y Mn z O 2 cathode material of the end-of-life lithium-ion batteries is presented. (eeer.org)
Recovery1
Given that the recycling of EoL-LiBs and recovery of metal values for reuse offers a sustainable technology. (eeer.org)
Hydrochloric acid is an aqueous solution of hydrogen chloride gas protonated into oxonium and chloride ions. (itwreagents.com)
Indirectly, its use is already mentioned by Pliny, in the separation of gold and silver in mining, since at high temperatures common salt and vitriol form hydrochloric acid, which forms a compound with silver. (itwreagents.com)
Possibly Georgius Agricola mentions a similar process for the separation of silver in his De Re Metallica of 1556 (the recipe given would give hydrochloric acid if by salt is meant common salt). (itwreagents.com)
Pseudo-Geber (13th century) described a reaction of mercury after heating it with common salt and alum or ferrous sulfate, forming fine white needles of mercuric chloride by reaction with hydrochloric acid. (itwreagents.com)
In the 15th century, hydrochloric acid and its use for softening bones and ivory for carving is mentioned, first in an anonymous Italian manuscript from the mid-15th century, located at the University of Bologna, and then in a recipe by Caterina Sforza (1490). (itwreagents.com)
In the first half of the 15th century, Basilius Valentinus obtained hydrochloric acid by reacting halite (rock salt) with iron vitriol. (itwreagents.com)
In 1597 Libavius mentions hydrochloric acid in his book Alchemia, but it was also mentioned by Giambattista della Porta (Magiae Naturalis 1558, 1589) as the best means of whitening teeth. (itwreagents.com)
Chlorine played an important role in the experiments conducted by medieval alchemists, which commonly involved the heating of chloride salts like ammonium chloride (sal ammoniac) and sodium chloride (common salt), producing various chemical substances containing chlorine such as hydrogen chloride, mercury(II) chloride (corrosive sublimate), and hydrochloric acid (in the form of aqua regia). (wikipedia.org)
Another important development was the discovery by pseudo-Geber (in the De inventione veritatis, "On the Discovery of Truth", after c. 1300) that by adding ammonium chloride to nitric acid, a strong solvent capable of dissolving gold (i.e., aqua regia) could be produced. (wikipedia.org)
He and the medieval alchemists also knew about aqua regia, which was produced by adding saline ammonia (ammonium chloride) or common salt to nitric acid. (itwreagents.com)
Chloride4
These crustal deposits are nevertheless dwarfed by the huge reserves of chloride in seawater. (wikipedia.org)
In the form of chloride ions, chlorine is necessary to all known species of life. (wikipedia.org)
Small quantities of elemental chlorine are generated by oxidation of chloride ions in neutrophils as part of an immune system response against bacteria. (wikipedia.org)
methods of preparation-Condensing chambers-Utilization of the residues from the manufacture of chloride of lime-Fluoric and fluosilicic acid-Glass from cryolite-Manganese compounds-Manganate of potash used in bleaching-Carbonic acid, and methods of preparing it from coal. (nih.gov)
Sulphuric acid1
Stearine-Manufacture of candles-Importance of the stearic acid industry-Historical notice-The De Milly and Motard process of saponification-Successful manufacture of star candles-Saponification by sulphuric acid-Saponification by water and distilla- tion-Saponification by water under high pressure-The change of fats under pressure, CONTENTS. (nih.gov)
Oxidation2
Chromate anions (CrO 2− 4) and dichromate (Cr 2 O 7 2−) anions are the principal ions at this oxidation state. (orielladigitaljournalism.com)
Molecular Weight: 82.97 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) Hydrogen Bond Donor Count: 0 Chromium forms several commercially valuable oxygen compounds, the most important of which is chromium oxide, commonly called chromium trioxide or chromic acid, CrO3, in which chromium is in the +6 oxidation state. (orielladigitaljournalism.com)
Salts1
Ammonia and salts of ammonia-Apparatus for making aqua ammonia-Details of the operation of distilling-Baryta and its compounds-Permanent white-Magnesia and IV CONTENTS. (nih.gov)
Sulfuric acid1
Its large-scale production from table salt and sulfuric acid was achieved by Johann Rudolph Glauber in the 17th century. (itwreagents.com)
Fluorine1
Cr(III) is precipitated by carbonate as Cr(OH), Chromium reacts directly with fluorine, F, Cr(III) is precipitated by hydroxide ions as Cr(OH). (orielladigitaljournalism.com)
Hydrogen1
hydrogen reduction of tungstic acid or its anhydride, or by the hydrogenation of tungsten trioxide or ammonium paratungstate. (nih.gov)
Mixture1
1961) measured barium in tissues gravimetrically following digestion of 15-20 grams of sample in a 2:1 (by volume) mixture of sulfuric and nitric acids. (cdc.gov)
Ammonia1
its com- pounds-Spent oxide of iron-Refuse lime-Absorbents of ammonia-Coal tar colors- Violet colors-Aniline reds, blues, greens, and their colors-Theory of the formation of colors-Carbolic acid colors-Naphthaline colors. (nih.gov)
Gases2
Chromium sheet is a popular material for all types of protective coatings because of its high corrosion resistance to many different acids, bases and high-temperature gases. (tungstenmolybdenummetals.de)
148. Which one of the following physical quantities is the same for molecules of all gases at a given temperature? (dsguruji.com)
Strong1
It is a strong inorganic acid and belongs to the mineral acids. (itwreagents.com)