Ammonium acid formate oxalate

Plumes from biomass burning can also have unique signatures. For example, organics, ammonium, potassium, sodium, nitrate, nitrite, sulfate, chloride, phosphate, elemental carbon, and the anions of organic acids (formate, acetate, oxalate, etc.) have all been measured in particles in the plumes from burning vegetation (e.g., see Cofer et al., 1988 Andreae et al., 1988 and Artaxo et al., 1994). 

Synonym Ammonia Water Amfbnioformaldehyde Ammonium Acetate Ammonium Acid Fluoride Ammonium Amidosulfonate Ammonium Amidosulphate Ammonium Benzoate Ammonium Bicarbonate Ammonium Bichromate Ammonium Bifluoride Ammonium Carbonate Ammonium Chloride Ammonium Citrate Ammonium Citrate, Dibasic Ammonium Decaborate Octahydrate Ammonium Dichromate Ammonium Disulfate-Nickelate (II) Ammonium Ferric Citrate Ammonium Ferric Oxalate Trihydrate Ammonium Ferrous Sulfate Ammonium Fluoride Ammonium Fluosilicate Ammonium Formate Ammonium Gluconate Ammonium Hydrogen Carbonate Ammonium Hydrogen Fluoride Ammonium Hydrogen Sulfide Solution Ammonium Hydroxide Ammonium Hypo Ammonium Hyposulfite Ammonium Iodide Ammonium Iron Sulfate Ammonium Lactate Ammonium Lactate Syrup Ammonium Lauryl Sulfate Ammonium Molybdate Ammonium Muriate Ammonium Nickel Sulfate Ammonium Nitrate Ammonium Nitrate-Urea Solution Ammonium Oleate... 

The performance of the FBI can be enhanced by the use of (volatile) additives, such as ammonium acetate, formate, or oxalate, to the mobile phase [92]. They are assumed to act as carriers. Similarly, the use of additives with structures related to the target analyte structures, e.g., phenoxyacetic acid in the analysis of chlorophenoxyacetic acids, was evaluated as well [93]. The carrier effects, exerted by either mobile-phase additives, coeluting compounds, and/or isotopically-labelled standards, is not really understood from a mechanistic point of view. It caimot be applied to consistently enhance the performance for some compounds it works fine, while for others no effects are observed. 

One of the simplest methods of preparation is by decomposition of a thermally unstable compound. The nitrate or chloride is often preferred, sulphates tend to decompose at higher temperatures. Where the presence of residual traces of anion is to be avoided, the metal salts of organic acids are particularly useful. Formates, oxalates, acetates etc, decompose at low temperatures and often reduce the metal at the same time. For the preparation of catalysts from anions, the ammonium salt is frequently used. Metallic salts of complex acids can be used as a source of metal oxide mixtures. Decomposition of the appropriate chromate, tungstate, molybdate or vanadate will produce the mixed oxide. 

Color reactions Boric acid (hydroxyquinones). Dimethylaminobenzaldehyde (pyrroles). Ferric chloride (enols, phenols). Haloform test. Phenylhydrazine (Porter-Silber reaction). Sulfoacetic acid (Liebermann-Burchard test). Tetranitromethane (unsaturation). Condensation catalysts /3-Alanine. Ammonium acetate (formate). Ammonium nitrate. Benzyltrimethylammonium chloride. Boric acid. Boron trilluoride. Calcium hydride. Cesium fluoride. Glycine. Ion-exchange resins. Lead oxide. Lithium amide. Mercuric cyanide. 3-Methyl-l-ethyl-2-phosphoiene-l-oxlde. 3-Methyl-1-phenyi-3-phoipholene-1-oxide. Oxalic acid. Perchloric acid. Piperidine. Potaiaium r-butoxIde. Potassium fluoride. Potassium... 

Ammonium oxalate Potassium formate oxalic acid mfg. 

Study of liquid and membrane extraction processes is a matter of primary importance for intensive development of extraction, separation, and concentration methods of different nature substrates, especially such valuable ones as rare and scattered metals. They are used in metalluigy for production of special cast iron grades, steel, and nonferrous metals alloys. Rare earth metals (REM) additives increase quality of metalluigical products improve such properties as shock resistance, viscosity, and corrosion resistance. Such materials are used particularly in aerospace industry. A conventional extraction process of rare earth metals from such solutions comes down to chemical deposition with oxalic acid or ammonium carbonate, formation of oxalates or metals carbonates and further washing, filtration, and calcination to oxides that then are dissolved in hydrochloric acid and separated. - Researches that were carried out during the last years have demonstrated that liquid and membrane extraction processes are the most promising methods of extraction, concentration, and separation of rare and scattered metals ions." ... 

Pore fluids used in this study included distilled water, an acetate pH buffer, and 0.01 M oxalic acid with the acetate pH buffer. The buffer (4135 ppm total acetate) had an initial pH at 25 °C (pH,) of 4.7. The buffered oxalic acid (1000ppm oxalate, 4135 ppm acetate) had pHi = 4.2. Ammonium acetate/acetic acid (CH3COONH4/CH3COOH) was chosen as the pH buffer because acetic acid commonly occurs in formation waters in conjunction with difunctional carboxylic acids. The concentration of total acetate in the buffer was chosen to be in the range of that found in natural waters. In addition, the initial pH values (4.2-4.7) were chosen to be in the range of calculated values (4.0-5.5) for reservoir waters corrected for known amounts of degassing of CO2 and H2S (Kharaka et al. 1986). 

Sodium methoxide, 3-methyl-4-nitroanisole, diethyl oxalate, 30% hydrogen peroxide, 97% sodium hydride, methyl acetoacetate, sodium sulfate, 10% palladium on activated carbon, ammonium formate, and 2-nitrophenylacetic acid were purchased from Aldrich Chemical Company, Inc., and were used without further purification. 

Much the same activity is retained when the nitrogen atoms in the heterocyclic nucleus are shifted around. The convergent scheme to this related compound starts with the acylation of alanine (35-1) with butyryl chloride (35-2). The thus-produced amide (35-3) is then again acylated, this time with the half-acid chloride from ethyl oxalate in the presence of DMAP and pyridine to afford the intermediate (35-4). In the second arm of the scheme, the benzonitrile (35-5) is reacted with the aluminate (35-6), itself prepared from trimethyl aluminum and ammonium chloride, to form the imidate (35-7). Treatment of this intermediate with hydrazine leads to the replacement of one of the imidate nitrogen atoms by the reagent by an addition-elimination sequence to form (35-8). Condensation of this product with (35-4) leads to the formation of the triazine (35-9). Phosphorus oxychloride then closes the second ring... 

Ammonium Tetranitrito - diammino - cobaltate, [Co(XH3)2 (N02)4]NH4, is prepared from cobaltous chloride by mixing an aqueous solution of the salt with aqueous ammonium-chloride solution, sodium nitrite, and ammonia, and oxidising the mixture by passing air through it for several hours. The solution is allowed to stand in air for some days, when crystals gradually separate. These are collected, washed, and reerystallised from water.3 The substance crystallises in brown rhombic prisms. It is decomposed on treatment with potassium hydroxide with evolution of ammonia, and a cold solution reacts with ammonia in presence of ammonium salts, with formation of flavo-dinitro double salts, of which [Co(NH3)4(N02)2][Co(NH3)2(N02)4] is typical. Oxalic acid transforms it into the oxalato-dinitrito-diammino-salt, [Co(NH3)2(N02)2(C204)]NH4. 

Other physical phenomena that may be associated, at least partially, with complex formation are the effect of a salt on the viscosity of aqueous solutions of a sugar and the effect of carbohydrates on the electrical conductivity of aqueous solutions of electrolytes. Measurements have been made of the increase in viscosity of aqueous sucrose solutions caused by the presence of potassium acetate, potassium chloride, potassium oxalate, and the potassium and calcium salt of 5-oxo-2-pyrrolidinecarboxylic acid.81 Potassium acetate has a greater effect than potassium chloride, and calcium ion is more effective than potassium ion. Conductivities of 0.01-0.05 N aqueous solutions of potassium chloride, sodium chloride, potassium sulfate, sodium sulfate, sodium carbonate, potassium bicarbonate, potassium hydroxide, and sodium hydroxide, ammonium hydroxide, and calcium sulfate, in both the presence and absence of sucrose, have been determined by Selix.88 At a sucrose concentration of 15° Brix (15.9 g. of sucrose/100 ml. of solution), an increase of 1° Brix in sucrose causes a 4% decrease in conductivity. Landt and Bodea88 studied dilute aqueous solutions of potassium chloride, sodium chloride, barium chloride, and tetra-... 

Thorium has the oxidation state of (IV) in all of its important compounds. Its oxide, ThCL. and its hydroxide are entirely basic. The nature of the 10ns present in a number of solutions of the soluble compounds is not known with certainty. Complex ions involving sulfate are suggested by the increased solubility of the sulfate in solutions of the acid sulfates. Similarly, other complex ions are suggested by the solubility of the carbonate in excess alkali carbonate and of the oxalate in ammonium oxalate. Such ready complex ion formation is consistent with the high positive charge of the thorium-flV) ion. 

That cyanogen is N = C—C=N is proven both by its analogy to molecular oxygen, in the above formation from mercuric cyanide, and by the fact that it is the nitrile of oxalic acid. When hydrolyzed it reacts with four molecules of water and yields oxalic acid and ammonia which then, of course, unite and form ammonium oxalate. 

Silica. The silica content of natural waters is usually 10 to x 10 ) M. Its presence is considered imdesirable for some industrial purposes because of the formation of silica and silicate scales. The heteropoly-blue method is used for the measurement of silica. The sample reacts with ammonium molybdate at pH 1.2, and oxalic acid is added to reduce any molybdophosphoric acid produced. The yellow molyb do silicic acid is then reduced with l-amino-2-naphthol-4-sulfonic acid and sodium sulfite to heteropoly blue. Color, turbidity, sulfide, and large amounts of iron are possible interferences. A digestion step involving NaHCO can be used to convert any molybdate-unreactive silica to the reactive form. Silica can also be determined by atomic... 

Since oxahc acid and/or oxamic acid were assumed to be the possible intermediates to form amino acids and nucleic acid bases from ammonium carbonate, 0.05 M oxalic acid or oxamic acid were added into the solutions and irradiation was carried out. These results are included in Table 1. The presence of intermediates facilitated the formation of amino acids and nucleic acid bases significantly. When Mg + was present in addition to the intermediates, the yields of amino acids and nucleic acid bases increased remarkably, although the reproducibility for nucleic acid bases was fairly poor. 

This process is supported by the evidence that the yields of amino acids are significant at high temperatiu s such as 90 °C. The presence of Mg enhances this process through the stabilization of oxamic acid caused by the complex formation between oxamic add and Mg and hence the yields of amino adds from ammonium oxalate increase remarkably in the presence of 0.1 M MgCl2. Here, the thermal conversion of soUd ammonium oxalate to oxamide via oxamic acid is weU known. 

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