Triethanolamine solutions

Procedure. Dissolve a weighed amount of ferro-manganese (about 0.40 g) in concentrated nitric acid and then add concentrated hydrochloric acid (or use a mixture of the two concentrated acids) prolonged boiling may be necessary. Evaporate to a small volume on a water bath. Dilute with water and filter directly into a 100 mL graduated flask, wash with distilled water and finally dilute to the mark. Pipette 25.0 mL of the solution into a 500 mL conical flask, add 5 mL of 10 per cent aqueous hydroxylammonium chloride solution, 10 mL of 20 per cent aqueous triethanolamine solution, 10-35 mL of concentrated ammonia solution, about 100 mL of water, and 6 drops of thymolphthalexone indicator solution. Titrate with standard 0.05M EDTA until the colour changes from blue to colourless (or a very pale pink). 

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 ... 

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. 

Procedure Adjust to pH 3.60 a volume of Hydroxylamine Hydrochloride Solution sufficient for analyzing both the blank and the sample. Using a suitable autotitrator, titrate with Triethanolamine Solution. 

Transfer 65.0 mL of the pH 3.60 Hydroxylamine Hydrochloride Solution into each of two titration cups. Add a Teflon (or equivalent) stirrer to each cup. Using the autotitrator, add 30.8 mL of the neutralized Triethanolamine Solution to each titration cup, cover, and mix. Using a weighing pipet, introduce into one of the cups a suitable portion of sample equivalent to about 300 mg of Glutaraldehyde. Mix the solutions thoroughly, and allow the sample and blank to stand at room temperature for at least 60 min but not for more than 90 min. 

Triethanolamine solution Dilute 90ml of triethanolamine to 100ml and adjust the pH to 8.1 with HGl. Dilute to 200ml and mix equal volume of distilled water containing 100gofBaGl2.2H20. 

Weigh 10 g air dry sample into a 100 ml beaker and add 40 ml KCl-triethanolamine solution. Stir thoroughly frequently for 20 minutes. 

Determine a blank for KCl-triethanolamine solution using Eriochrome black T and calcon indicators. 

PBS/formalin Mix 400 mL of autoclaved, deionized water with 50 mL of lOX PBS and 50 mL of formalin (40% formaldehyde solution BDH, cat. no. 10113). Measure 50 mL aliquots using sterile, single-use plasticware. This solution is stable at room temperature but should be checked for contamination prior to use Saline (see Note 4)- 0 9% (w/v) NaCl in RNase-free water Acetylation buffer (see Note 5) O.lMtnethanolamme, 0.25% (v/v) acetic anhydride in saline. To make 500 mL, add 7 mL of triethanolamine solution to 500 mL of 0.9% saline. Immediately before use, add 1.25 mL of acetic anhydride by shaking vigorously for a few seconds. 

Stock acetic anhydride should be kept dry (over desiccant) at room temperature If a syringe or pipet is used to measure the acetic anhydnde, ensure that the graduations on the side of the barrel are not submerged because the ink tends to be soluble in this compound. Triethanolamine solution is viscous and best measured with a 10-mL synnge. 

Boiling Points and Condansatlon Temperatures of Aqueous Triethanolamine Solutions at 300 mm Hg Absolute... 

Weight per Gallon of Aqueous Triethanolamine Solutions at Various Temperatures... 

Table 14.70 Specific Heats of Aqueous Triethanolamine Solutions at 2r c (19)...

Total Vapor Pressures of Aqueous Triethanolamine Solutions (weight % of amine)... 

Measure 50 ml of the water sample into each of two 250-ml beakers (if concentration < 10 mg/1 Ca2+ use correspondingly more evaporate to 50 ml) and acidify with perchloric acid (2) (pH 2 - 3). Boil until the carbon dioxide is expelled, and when cool treat with 10 ml of masking solution. Leave the samples to stand for 10 minutes, then add 1 ml of triethanolamine solution and adjust to pH 10.5 with ethanolamine solution (thereby prevent-... 

Reduction of CO2 is possibly even more appealing. Visible-light-induced reduction to HCOOH (selectivity > 75%, quantum efficiency 1.9% at 405 nm) has been obtained by utilizing the combination of a p-type semiconductor photosensitizer, N-Ta20s, and a reducing catalyst, a Ru complex in an acetonitrile/triethanolamine solution. ... 

Figure 8.6. ESR spin trapping spectrum recorded upon irradiation of a D 1/triethanolamine solution in tert-buiylbenzene (irradiation diode laser 532 nm under N ) a) before and b) after irradiation...

Triethanolamine solution, 3% Months/years Weeks/ months Years Months... 

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