Ammonium acetate bicarbonate

AMMO 2.5 EC , cypermetlu-in, 13 Ammonia, 13 Ammonium acetate, 13 Ammonium arsenate, 13 Ammonium benzoate, 13 Ammonium bicarbonate, 13 Ammonium bifluoride, 14 Ammonium bisulfite, 14 Ammonium carbamate, 14 Ammonium carbonate, 14 Ammonium chloride, 14 Ammonium chlorplatmate, 14 Ammonium clu omate, 14 Ammonium citrate, 14 Ammonium diclu omate, 14 Ammonium fluoride, 14 Ammonium fomiate, 15 Ammonium hexafluorosilicate, 15 Ammonium hydroxide, 15 Ammonium metavanadate, 15 Ammonium molybdate, 15 Ammonium nitrate, 15 Ammonium oxalate, 15 Ammonium perfluorooctanoate, 15 Ammonium persulfate, 15 Ammonium phosphate, 15 Ammonium picrate, 16 Ammonium salicylate, 16... 

Ammonium acetate Ammonium adipate Ammonium benzoate Ammonium bicarbonate Ammonium biflluoride Ammonium binoxalate Ammonium bisulfate Ammonium bitartrate Ammonium tetraborate Ammonium bromide Ammonium carbonate Ammonium chloride Ammonium citrate Ammonium diclnomate Ammonium fluoride Ammonium fluorosilicate Ammonium gluconate Ammonium iodide Ammonium molybdate Ammonium nitrate Ammonium oxalate Ammonium perchlorate Ammonium picrate Ammonium polysulfide Ammonium salicylate Ammonium stearate Ammonium sulfate Ammonium sulfide (hydrosulfide) Ammonium tartrate Ammonium tliiocyanate Ammonium thiosulfate... 

Bovine microtubule bicarbonate Ammonium acetate Biphasic/triphasic LCQ SEQUEST (McDonald et al., 2002)... 

Ammonium acetates, 2 711-712 Ammonium alum calcination, 2 395 neutralization, 2 430 Ammonium benzoate, 3 634 Ammonium bicarbonate, 2 712-713 Ammonium bifluoride, 2 717-718 Ammonium bisulfate formation, 10 98 Ammonium bromide, 2 714... 

When chromatographic resolution of species based on modifications located at the protein surface is desired, it may be advisable to use conditions that favor retention of native conformation.17 Here, the standard acidic conditions described in the preceding text may be inappropriate, and mobile phases buffered near neutrality may be required. Buffers based on ammonium acetate, ammonium bicarbonate, and triethylammonium phosphate may prove more useful in resolving polypeptide variants with differing posttranslational modifications, amino acid substitutions, or oxidation and deamidation products. The addition of more hydro-phobic ion-pairing agents may be needed to obtain polypeptide retention, and a variety of alkyl sulfonates and alkyl amines have been described for specific applications.17... 

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... 

Volatile buffers were reconsidered for the modified method. Triethylamine was ruled out primarily because it could not be obtained in high purity and because the secondary and primary amines contaminating it could potentially react with solutes present in the water sample. Preliminary evidence of reaction between ethidium bromide and triethylammonium bicarbonate was obtained, but the reaction product was not characterized. The components of volatile buffers that appeared acceptable on the basis of chemical purity were ammonia, acetic acid, and formic acid. A few exploratory experiments were conducted involving the elution by ammonium formate and ammonium acetate of EB or quinaldic acid exchanged onto AG MP-50 or IRA 900. These experiments showed that 1 M ammonium formate in water was a very poor eluent, but that EB could be eluted from AG MP-50 with 1 M ammonium formate in methanol. Elution was essentially complete with 6 bed volumes of the methanolic eluent, whereas neither methanol alone nor aqueous 1 M ammonium formate was able to elute this solute. This situation pointed out the necessity for a counterion to displace exchanged solutes and, additionally, indicated that the displaced solute be highly soluble in the eluting solvent. 

Hydronium ion Ammonium ion Bicarbonate ion Acetate ion Nitrate ion Cyanide ion Hydroxide ion Carbonate ion Sulfate ion Phosphate ion... 

It is important to remember the few restrictions imposed by electrospray when considering an LC-MS analysis. Common solvents like methanol, water, acetonitrile and volatile salts (below 25 mM) like ammonium acetate and ammonium bicarbonate are acceptable in the mobile phase, whereas phosphate salts/buffers, mineral acids or other nonvolatile components cannot be used. Unfortunately, this conflicts with many of the routine mobile phases used for the analysis of phenolic compounds and anthocyanins, necessitating changes in methods when going from LC to LC-MS analyses. 

The eluents most commonly used in peptide purification by reversed phase HPLC are water and acetonitrile. These are often buffered with trifluoroacetic acid (0.1% v/v, TFA), ammonium acetate (0.05-0.1 mol/dm3 at pH 4-8) or phosphate (0.05-0.1 mol/dm3 sodium or potassium salt at pH 2-8). In addition, polymeric reversed phase media also performs well at high pH and is often buffered with ammonium hydroxide or ammonium bicarbonate (0.05-0.1 mol/dm3 at pH 8-9). 

Ammoniacal Silver Nitrate TS, 850 Ammonia Detector Tube, 862 Ammoniated Glycyrrhizin, 23 Ammonia TS, 850 Ammonia TS, Stronger, 850 Ammonia Water, Stronger, 850 Ammonium Acetate TS, 850 Ammonium Alginate, 24 Ammonium Alum, 20 Ammonium Bicarbonate, 25 Ammonium Carbonate, 25 Ammonium Carbonate TS, 850... 

The residue then was dissolved in 30 ml of 0.04 M aqueous triethyl-ammonium bicarbonate buffer (pH 7.5), (resulting pH 5.6). It was chromatographed on a DEAE cellulose column (HCOJ form) (3.4 X 15.0 cm), with elution first with 500 ml of water and then with a linear gradient of trimethylammonium bicarbonate at pH 7.2 (0-0.07 M). XXVII was completely resolved from some of XXVIII which was formed under the above reaction conditions. However, it was still contaminated by small amounts of cAMP and ethyl 2-diazo-malonic acid. These impurities were apparently generated from the hydrolysis of some XXVII when the triethylammonium bicarbonate was removed. Pure samples of XXVII were obtained by preparative paper chromatography on either Whatman 40 or 3 MM paper with overnight development with ethanol 0.5 M ammonium acetate, pH 7.0 (5 2, v/v). 

The Henry reaction is routinely performed in the presence of only catalytic quantities of a base. Several base catalysts including alkali metal hydroxides, carbonates, bicarbonates, alkoxides, calcium and barium hydroxides and magnesium and aluminum ethoxides have been used. Anion-exchange resins and, among organic bases, primary and tertiary amines and ammonium acetate and fluoride have proven to be... 

A convenient one-pot method for the synthesis of acridine derivatives was carried out by supporting a mixture of dimedone, aromatic aldehydes, and ammonium bicarbonate (02SC2181) or ammonium acetate (99H21), as a nitrogen donor, on neutral or better basic alumina and catalytic amount of DMF to give upon MW irradiation good yields of 356 (R = Ar, R1 = H) within very short time (99H21). The reaction can... 

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