Triethanolamine, solution preparation

Triethanolamine Solution Prepare a 0.5 N solution by transferring 65 mL (74 g) of 98% triethanolamine into a 1-L volumetric flask, dilute to volume with water, and mix. 

Currently the most suitable system, that will generate potentials up to -1050 mV, is the iron-triethanolamine complex prepared from either iron(II) or iron(III) salts. Using iron(III) sulphate penta- or hexahydrate, for example, dyebaths are prepared by first dissolving sodium hydroxide in a small amount of water, to which is added the triethanolamine. Hydrated iron (III) sulphate is separately dissolved in a small amount of water and then added to the alkaline triethanolamine solution until the initially precipitated iron(III) hydroxide redissolves, after which the solution is diluted to full volume to give ... 

O.IM Triethanolamine freshly prepared 1/10 dilution of IM stock solution in sterile distilled water. 

Silicone resins are normally supplied for use as solutions, prepared as described above. The final conversion of the partially polymerized soluble material into a fully cross-linked product is carried out in situ. In the cross-linking process, remaining silanol groups are condensed by heating in the presence of a catalyst, e.g., zinc octoate, cobalt naphthenate or triethanolamine. 

The indicator solution is prepared by dissolving 0.2 g of the dyestuff in 15 mL of triethanolamine with the addition of 5 mL of absolute ethanol to reduce the viscosity the reagent is stable for several months. A 0.4 per cent solution of the pure dyestuff in methanol remains serviceable for at least a month. 

Procedure. Prepare a standard calcium chloride solution (0.01 M) by dissolving 1.000 g of calcium carbonate in the minimum volume of dilute hydrochloric acid and diluting to 1 L with de-ionised water in a graduated flask. Also prepare a 20 per cent aqueous solution of triethanolamine. 

Acetylation of slides prevents nonspecific, electrostatic binding of DNA probe to the cells. It is important that the acetylation solution be prepared immediately before use, with stirring, and that it not be reused. Prepare as follows add O.IM triethanolamine to a Coplin jar with a magnetic stirring bar. As stirring proceeds, add sufficient acetic anhydride to give a final concentration of 0.25% (v/v). 

Fluorhydroxyapatite solid solutions can be prepared by the sol-gel method [134,135]. Cheng et al. reported the control of fluoride content in fluorhydroxyapatite solid solutions by the amounts of triethanolamine (N(CH2CH20H)3) and trifluoroacetic acid (CF3COOH) in the mixed ethanol solutions of Ca(N03)2 and P0(CH2CH20H)x(0H)3 x with a Ca/P ratio of 1.67 [134]. After evaporation of the mixed ethanol solution at 150°C on a hot plate, the powder obtained, comprising a homogeneous mixture of calcium nitrate crystallites and amorphous calcium phosphates, is then heated at 500 or 900°C for 1 h to be transformed into the pure apatitic phase. 

Spherical amorphous particles of zinc oxide were prepared by hydrolyzing zinc acetate solutions in the presence of diethylene glycol (111), or zinc nitrate solutions containing triethanolamine (28). 

An example of solid solution formation by separate deposition of binary layers followed by annealing to interdiffuse the two layers is given for Cu3BiS3 deposition [32]. Bi2S3 (film thickness ca. 90 nm) was deposited at room temperature from a Bi(N03)3/triethanolamine/thioacetamide bath onto glass slides. CuS (300-600 nm thick) was then deposited on this film from a CuCli/tri-ethanolamine/ammonia/NaOH/thiourea bath at room temperature. The films were annealed at 250°C for 1 hr. Formation of the CusBiSs phase could be seen from the XRD pattern. Measurement of precipitated powders (prepared by putting the Bi2S3 precipitated in the first deposition in the CuS deposition solution) annealed at 300°C showed more clearly the formation of the solid solution. 

The preparation of these solutions is described in the text in section 4.6.7.2. Pipette these successively into 1-cm cuvettes. The absorbance of the mixtures is read twice (at 340 nm) before (ODi) and after (OD2) the addition of glucose-phosphate isomerase. G6P-DH glucose-6-phosphate dehydrogenase, HK hexokinase, NADP nicotinamide adenine dinucleotide, PGI glucose phosphate isomerase, TEA triethanolamine... 

TiOz coated with potassium ferrocyanide proved to be an effective catalyst for the reduction of C02 to formic acid and formaldehyde.169 A very stable and reproducible catalytic system was prepared by immobilizing Ni2+ and Ru2+ complexes into Nation membrane, which was used for the selective reduction of C02 to formic acid.170 Formic acid was again formed when Zn and Co phthalocyanines were adsorbed onto a Nation membrane on irradiation with visible light in acidic aqueous solution containing triethanolamine as a hole scavenger. Cobalt comns (B i2) acting as homogeneous catalysts in acetonitrile-methanol solutions induced the formation of formic acid and CO.172... 

Prepare the solution of piroxicam in propylene glycol and dexpanthenol at 70-80°C, add ethanol and Lutrol F 127. Stirr the highly viscous mixture, add 50% of the hot water (70°C), adjust the pH with triethanolamine to about 7, add the rest of the water, cool to room temperature when the air bubbles escaped and adjust the pH to about 8. 

Figure 16. Inhibition of the reaction between p-nitrophenyl acetate and HSA by inorganic anions. Solutions of each anion, triethanolamine, and 3.5 X 10 5M HSA were prepared at the appropriate concentrations and pH 8.1. Logarithms of the observed pseudo-first-order rate constants are plotted vs. a function of ionic strength, jjl, for triethylammonium phosphate (O), fluoride (D), sulfate (%), chloride (M), iodide (A), and perchlorate ( A).

Hydroxylamine Hydrochloride, 0.5 N (35 g NH2OHHCl per 1000 mL) Dissolve 35 g of hydroxylamine hydrochloride in 150 mL of water, and dilute to 1000 mL with anhydrous methanol. To 500 mL of this solution add 15 mL of a 0.04% solution of bromophenol blue in alcohol, and titrate with 0.5 N Triethanolamine until the solution appears green-blue by transmitted light. Prepare this solution fresh before each series of analyses. 

Triethanolamine is also used in salt formation for injectable solutions and in topical analgesic preparations. It is also used in sun-screen preparations. ... 

Salicylamide. Salicylanttde. M-hydroxybenzumide. is a derivative of salicylic acid that has been known for almost a century. It is readily prepared from salicyl chloride and ammonia. The compound occurs as a nearly odorless, white crystalline powder. It is fairly stable to heat. light, and moisture. It is slightly soluble in water (1 500) soluble in hot water, alcohol (1 15). and propylene glycol and sparingly soluble in chloroform and ether. It is freely. soluble in solutions of alkalies. In alkaline solution with sodium carbonate or triethanolamine, decomposition takes place, resulting in a yellow to red precipitate. 

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