Ammonium bicarbonate, solution preparation

Nickel carbonate forms many double salts, such as, Na2COs NiCOs IOH2O with alkali metal carbonates. However, such double carbonates usually are prepared by mixing an alkali metal or ammonium bicarbonate solution with a nickel salt solution, followed by crystallization. 

Flow chart of the mixed precipitation method is shown in Fig. 3.42. Briefly, alumina precursor powder was first synthesized by adding aluminum nitrate solution (0.15 M) dropwisely into the ammonium bicarbonate solution (1.5 M) under vigorous stirring. The as-prepared alumina precursor powder was then dispersed in yttrium nitrate solution to form uniform suspension. After that, ammonium bicarbonate solution (0.5 M) was added dropwisely into the suspension, so that yttrium precipitate was coated on the alumina precursor powder. The mixed precursor was aged, washed, dried, and then calcined to form yttrium aluminum garnet, with a phase formation temperature about 300 °C lower than that required by the traditional solid-state reaction process. Alternatively, it is also worth trying to coat yttria with alumina. 

M Ammonium bicarbonate To prepare 10 ml, dissolve 79 mg ammonium bicarbonate in 8 ml UHQ water. Adjust to the appropriate pH with 50% acetic acid (pH 7.8 and 4.2 are standard solutions in our laboratory). Adjust to 10 ml with UHQ water. Store at 4°C for a maximum of 14 days. 

The method is generally applicable when other modes of esterification are either slow, inefficient, or likely to cause isomerisation it is, however, time-consuming and expensive. Small quantities of acid impurities are sometimes produced, hence it is advisable to wash the ester with saturated sodium bicarbonate solution. The silver salt can usually be prepared by dissolving the acid in the calculated quantity of standard ammonium hydroxide solution and... 

The mauve colored cobalt(II) carbonate [7542-09-8] of commerce is a basic material of indeterminate stoichiometry, (CoCO ) ( (0 )2) H20, that contains 45—47% cobalt. It is prepared by adding a hot solution of cobalt salts to a hot sodium carbonate or sodium bicarbonate solution. Precipitation from cold solutions gives a light blue unstable product. Dissolution of cobalt metal in ammonium carbonate solution followed by thermal decomposition of the solution gives a relatively dense carbonate. Basic cobalt carbonate is virtually insoluble in water, but dissolves in acids and ammonia solutions. It is used in the preparation of pigments and as a starting material in the preparation of cobalt compounds. 

Prepare a solution of TCPK-trypsin in 50 mM ammonium bicarbonate, pH 8.0, at a concentration of 100 ng/pl. Add 10 pi of the trypsin solution to every 10 pg of combined, labeled protein solution from Step 6. Incubate at 37°C for 12-16 hours or overnight with mixing. 

Chromatography buffer is prepared by dissolving 4.0 g of ammonium bicarbonate in 250 mL of deionized water and adding 500 mL of isopropyl alcohol and 250 mL of acetonitrile. The resulting solution is approximately 50 mM in ammonium bicarbonate. 

In the course of this work two phenomena were noted for which no explanation was sought. When ammonium bicarbonate was added to sea water to prepare a regenerant solution, a white precipitate was formed which was settled out and discarded with no attempt made at chemical analysis. Toward the end of some of the regeneration cycles and at the start of some of the feed cycles, gas was evolved in the ion exchange columns, which eventually disappeared. This gas, which was not identified, caused serious flow impedance. 

Summary Ammonium perchlorate is prepared by adding an ammonia solution to a concentrated solution of sodium perchlorate, and then passing carbon dioxide into the solution over several hours to precipitate the sodium as the water insoluble sodium bicarbonate. The ammonium perchlorate remains in solution, and the solution is then filtered to remove the water insoluble sodium bicarbonate. Thereafter, the ammonium perchlorate is then collected by recrystallization in the usual means. 

Summary Ammonium chlorate is prepared in a similar manner as other inorganic ammonium salts, by the precipitation of metal ions with carbon dioxide. In thiscase, sodium chlorate istreated with ammonia, and carbon dioxide isthen passed there into. The carbon dioxide reacts with the water forming carbonic add. The carbonic add reacts with the sodium chlorate forming the water insoluble sodium bicarbonate. The ammonia molecules in solution take up an addic hydrogen from the carbonic add, and then unite with the chi orate ions forming ammonium chlorate in solution. The salt isthen easily recovered by recrystallization. 

Ammonium bicarbonate stock (100 mMl was made and stored at 4° C. Stock solutions of all proteins were prepared in 0.1% TFA, 50% acetonitrile solutions and stored at -20°C until use. Aliquots of the stocks, containing 10 to 100 pg of protein, were dried in a centrifugal dryer prior to digestion. To 5 mg of N,N-diethylaminopropyl-bis-(3-hydroxypropyl) phosphine, 1 ml of 50% isopropyl alcohol/50 mM ammonium bicarbonate was added. The samples were then resuspended in 20 pi reagent solution per 10 pg of protein, heated at 80 C for 2 hours, and dried to remove volatile components. 

Two solutions are required to form the substrate mixture. Solution A contains 0.03 ATP and 0.03 M MgS04 7H20, adjusted to pH 6.7 with solid KHCO3. Solution B contains 0.04 M L-omithine hydrochloride and 0.04 ilf A -acetylglutamic acid and is adjusted to pH 6.0 with approximately 1 N KOH solution, made up to 0.4 M with the calculated amount of solid ammonium bicarbonate and adjusted to pH 7.5 with solid KHCO3. The substrate is prepared by mixing 2 parts of solution A with 1 part of solution B pH about 7. It is gassed with CO2 just before use until the pH is about 6.8 at 37°. 

A. Preparation of Kettle Charge Aerosol 22 (a 35% by weight aqueous solution of tetrasodium N-(1,2-dicarboxyethyl)-N-octadecylsulfonsuccinamate (10.8 g)) methanol (9.5 g), sodium bicarbonate (1.8 g) were dissolved In deionized water (176 g) and an ammonium persulfate solution (38 g of a 10% by wt aqueous solution) was added. The solution was purged with nitrogen for 15 min and charged to the polymerization vessel and heated to 60°C. 

Each alloy catalyst was prepared by a coprecipitation method in which ammonium bicarbonate was added to an aqueous solution of nickel and copper nitrates. The resulting precipitate was dried and heated in air at 370°C to form a mixture of nickel and copper oxides. The mixed oxides were then reduced in hydrogen in several stages over a range of temperatures to produce the nickel-copper alloy. The reduction was completed at 400°C. 

Sample preparation Prepare a 1 mg/mL solution in 1% ammonium bicarbonate, ii ject a 100 pL aliquot. 

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