Ethylenediaminetetraacetic acid, solution preparation

Lee SH, Koo HY, Lee SM, Kang YC (2010) Characteristics of Y3AI5O12 Ce phosphor powders prepared by spray pyrolysis from ethylenediaminetetraacetic acid solution. Ceram Int 36 611-615... 

Test E Variation of the ternary solvent mixture. According to the standard operation procedure for sample preparation equal amounts (by volume) of CDCI3, methanol and Cs-EDTA (caesium ethylenediaminetetraacetic acid) solution were used. Cs-EDTA was held constant at 1 ml, CDCI3 was changed from 1 ml to 0.6 ml and MeOH from 1 ml to 1.4 ml. 

From this material, samples are cut and swelled to constant weight in a buffered saline solution prepared from 8.43 g sodium chloride (NaCl), 9.26 g boric acid (H3BO3), 1.0 g sodium borate (Na3B03), and 0.1 g of the disodium salt of the dihydrate of ethylenediaminetetraacetic acid [Na2 EDTA -(/ 0)21 ini L of distilled water. 

Takahashi M, Muramatsu Y, Suzuki T, Sato S, Watanabe M, Wakita K, Uchida T (2003) Preparation of Bi2Te3 films by electrodeposition from solution containing bi-ethylenediaminetetraacetic acid complex and Te02. J Electrochem Soc 150 C169-C174... 

A 1-liter three-necked flask was fitted with a Claisen head equipped with two dropping funnels, a mechanical stirrer, and a pH electrode. A solution containing 5g (0.012 mol) of the dye prepared above, 210 ml of water, and 0.2 g of ethylenediaminetetraacetic acid was added to the flask and stirred, while 250 ml of methylene chloride was added. The system was closed and flushed with argon, the pH was adjusted to 10, then 2.44 g (0.014 mol) of sodium dithionite was added. The solution turned orange and the pH dropped to 3.7. Aqueous 25% NaOH solution was added to bring the pH to 4.5, and then 7.53 g (0.027 mol) of 4-phenylsulfonylbenzoylchloride in 60 ml of methylene chloride was added dropwise. After l h the pH was raised to 10-11. The methylene chloride layer was separated and dried over... 

As heavy metals were known to influence the degradation pathway, experiments were carried ont to determine if excess levels of metals could be the root cause of the degradation. EDTA (ethylenediaminetetraacetic acid) is a known metal chelator and is often used in ampoule formulations. The addition of EDTA to samples of ampoule solutions prepared in the lab was shown to halt the degradation (Table 2). 

Sodium acetate p.a. (Merck) stock solution sodium acetate (1 M) is prepared by dissolving 82 g of sodium acetate and 375 mg ethylenediaminetetraacetic acid (EDTA) in 1000 ml H20. 

Weigh 0.5 g propyl gallate (0.5% final) and 0.5 g ethylenediaminetetraacetic acid, disodium salt dihydrate (EDTA 0.5% final) into a 100-ml volumetric flask, dissolve crystals in a small volume of 1 1 (v/v) ethanol/water and dilute to mark with ethanol/water solution. Prepare fresh daily. 

Iion(II) ethylenediaminetetraacetic acid [15651 -72-6], Fe(EDTA) or N,.NM,2-ethanediylbis[IV-(carboxymethyl)glycinato]ferrate(2—), is a colorless, air-sensitive anion. It is a good reducing agent, having E° = —0.117 V, and has been used as a probe of outer sphere electron-transfer mechanisms. It can be prepared by addition of an equivalent amount of the disodium salt, Na2H2EDTA, to a solution of iron(II) in hydrochloric acid. Diammonium [56174-59-5] and disodium [14729-89-6] salts of Fe(EDTA) 2— are known. 

N-2-hydroxyethylethylenediaminetnacetic acid, trisodium salt), NaJSDTA (ethylenediaminetetraacetic acid, tetrasodium salt), Na02CCH20H (sodium hydroxyacetate), and Na3C6H50 (trisodium citrate). Reagent chemicals and distilled and deionized water were used to prepare all test solutions. 

An aqueous 4 x 10 4 M Na2 EDTA solution is prepared by dilution of 37.2 mg of ethylenediaminetetraacetic acid disodium salt hydrate (Acros Chemical Company, Inc.) with deionized water to the mark in a 250-mL volumetric flask. 

Oral iron preparations Ferrous sulfate (tablets) Ferrous fumarate (tablets) Ferrous gluconate (tablets) Ferrous glycine sulfate (tablets or solution) Ferrous succinate (solution ) Sodium ironedetate (solution) Iron(ii) sulfate (40-105 mg Fe ) Iron(ii) fumarate (65-10 mg Fe ) Iron(ii) gluconate (35 mg Fe) Iron(n) glycine sulfate (25 100 mg Fe ) Iron(ii) succinate (37 mg Fe) Iron(n) chelate of ethylenediaminetetraacetic acid (FLDTA) (27.5 mg Fe)... 

Membrane fragments containing the Na-K ATPase were obtained from frozen rabbit kidneys by a modification of the method of Kinsolving et al. (8). Mg2+ and ethylenediaminetetraacetic acid (EDTA) were omitted from all wash solutions, and the enzyme was stored in 0.02M tris-acetate buffer of pH 6.8. A second preparation was obtained from calf brain by the method of Skou and Hilberg (9). Assays were conducted by adding the enzyme preparation to solutions containing Na+, K heavy metal ions, and ATP. The difference in the rate of release of phosphate ions, estimated by the method of Taussky and Shorr (10), in the absence and the presence of ouabain was taken as a measure of Na-K ATPase activity. 

B. Preparation of Disodium Ethylenediaminetetraacetic Acid Salt Solution... 

Prepare a solution containing 20 ppm of Pb as Pb (N03)2- Prepare similar solutions containing 20 ppm of Pb as (a) PbClj, (b) lead oxalate, and (c) lead acetate. Measure the absorbance by the solutions of the Pb resonance line at 283.3 nm. Note the change in absorbance as the compound changes. This is chemical interference. Find a literature method for the elimination of chemical interference using excess ethylenediaminetetraacetic acid (EDTA). Following the literature method, see if the use of EDTA does eliminate the chemical interference you observed. 

Preparation of core-shell nanoparticles of PtML/Pd core on carbon has also been attempted via an electroless Cu deposition intermediate step, where preformed carbon-supported Pd nanoparticles are suspended in a solution containing CUSO4 and ethylenediaminetetraacetic acid (EDTA) to deposit Cu, then ft salt added to galvanically displace the Cu. XPS and HAADF-STEM of the intermediate Cu/Pd nanoparticles confirmed the successful deposition of Cu via electroless deposition. The ft and Pd distributions in the final sample tracked one another in TEM elemental analysis, and 2.5 times ft mass activity improvement was observed in RDE tests [40]. 

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