ACTIVITY COEFFICIENTS OF LiNO3, HNO3AND NH4NO3IN DOWEX-1 ANION-EXCHANGE RESIN

1961 ◽  
Vol 65 (11) ◽  
pp. 2039-2041 ◽  
Author(s):  
J. Danon
Keyword(s):  
Anion Exchange ◽  
Activity Coefficients ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Dowex 1

THE CHROMATOGRAPHIC DETERMINATION OF GLUTAMIC, ASPARTIC, AND CYSTEIC ACIDS USING AN ANION EXCHANGE RESIN

1957 ◽  
Vol 35 (1) ◽  
pp. 1249-1258
Author(s):  
A. M. Marko
Keyword(s):  
Amino Acids ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Chromatographic Determination ◽  
Acetate Buffer ◽  
Cysteic Acid ◽  
Acidic Amino Acids ◽  
Normal Urine ◽  
Dowex 1

Optimum conditions for the separation of the acidic amino acids glutamic, aspartic, and cysteic on an anion exchange resin, Dowex-1 × 8, have been studied. The sample to be analyzed is adjusted to pH 7 and placed on a column of Dowex-1 × 8 previously equilibrated with 0.1 M acetate buffer at pH 4. Glutamic and aspartic acids are separated by elution with 0.1 M acetate buffer at pH 4.0–4.6. Cysteic acid is eluted with 0.2 M acetate buffer at pH 5.5–5.9. With this method quantitative separation of synthetic mixtures of the acidic amino acids has been achieved. This method has also been used to determine the dicarboxylic amino acids in acid hydrolyzates of various proteins, of normal protein-free plasma, and of normal urine.

High cadmium-109 recovery from a dissolved silver target solution using dowex 1×8 anion-exchange resin

2010 ◽  
Vol 52 (5) ◽  
pp. 565-569 ◽  
Author(s):  
M. Sadeghi ◽  
M. Mirzaii ◽  
Z. Gholamzadeh ◽  
P. Sarabadani ◽  
A. Sattari
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Silver Target ◽  
Dowex 1

THE CHROMATOGRAPHIC DETERMINATION OF GLUTAMIC, ASPARTIC, AND CYSTEIC ACIDS USING AN ANION EXCHANGE RESIN

1957 ◽  
Vol 35 (12) ◽  
pp. 1249-1258 ◽  
Author(s):  
A. M. Marko
Keyword(s):  
Amino Acids ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Chromatographic Determination ◽  
Acetate Buffer ◽  
Cysteic Acid ◽  
Acidic Amino Acids ◽  
Normal Urine ◽  
Dowex 1

Optimum conditions for the separation of the acidic amino acids glutamic, aspartic, and cysteic on an anion exchange resin, Dowex-1 × 8, have been studied. The sample to be analyzed is adjusted to pH 7 and placed on a column of Dowex-1 × 8 previously equilibrated with 0.1 M acetate buffer at pH 4. Glutamic and aspartic acids are separated by elution with 0.1 M acetate buffer at pH 4.0–4.6. Cysteic acid is eluted with 0.2 M acetate buffer at pH 5.5–5.9. With this method quantitative separation of synthetic mixtures of the acidic amino acids has been achieved. This method has also been used to determine the dicarboxylic amino acids in acid hydrolyzates of various proteins, of normal protein-free plasma, and of normal urine.

In Vitro Evaluation of Heparin Adsorption During Haemoperfusion with Dowex 1×2 Anion Exchange Resin

1995 ◽  
Vol 23 (1) ◽  
pp. 101-108
Author(s):  
M. Fini ◽  
G. Giavaresi ◽  
M Spighi ◽  
R. Giardino ◽  
M. L. Florio
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
In Vitro Evaluation ◽  
Dowex 1

scholarly journals Concentration of rhenium from dilute sodium chloride solutions

2008 ◽  
Vol 73 (3) ◽  
pp. 333-339 ◽  
Author(s):  
Dragoljub Lukic ◽  
Jurij Vucina ◽  
Slobodan Milonjic
Keyword(s):  
Sodium Chloride ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Elution Profile ◽  
Experimental Conditions ◽  
Sodium Chloride Solutions ◽  
Low Efficiency ◽  
The Given ◽  
Dowex 1

The conditions for the desorption of rhenium from the anion exchange resin Dowex 1-x8 by HNO3, HCl, H2SO4 and NaOH were determined. The solution (5.0?10-3 mol dm-3 Re in 0.15 mol dm-3 NaCl) was passed through a column containing 0.10 g of the resin. The total sorbed amount of rhenium was 0.20 g/g of the resin. It was then eluted by the corresponding eluent in the concentration range up to about 3.0 mol dm-3. The highest elution efficiency and the most favourable elution profile were found with 3.0 mol dm-3 HNO3. Over 77 % of the sorbed rhenium was found in the first 5 ml of the eluate. Practically all the rhenium was recovered with 20 ml of the acid. Under the given experimental conditions, HCl and H2SO4 were less favourable while NaOH was not applicable, due to very low efficiency of rhenium elution.

PEMODELAN MATEMATIS ADSORPSI CO2 DENGAN STRONG BASE ANION EXCHANGE RESIN SEBAGAI ADSORBEN UNTUK PURIFIKASI BIOGAS

2015 ◽  
Vol 5 (1) ◽  
pp. 11
Author(s):  
Anies Mutiari ◽  
Wiratni Wiratni ◽  
Aswati Mindaryani
Keyword(s):  
Anion Exchange ◽  
Pilot Plant ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Scale Up ◽  
Sum Of Squares ◽  
Strong Base ◽  
Model Transfer ◽  
Plant Parameter

Pemurnian biogas telah banyak dilakukan untuk menghilangkan kadar CO2  dan meningkatkan kandungan CH4  yang terkandung di dalamnya. Kandungan CH4 yang tinggi akan memberikan unjuk kerja yang lebih baik. Model  matematis proses adsorpsi CO2 disusun berdasarkan teori lapisan film antar fasa, dimana pada proses yang ditinjau terdapat tiga fase yaitu gas, cair dan padat. Model matematis dari data eksperimental   kecepatan dan kesetimbangan proses adsorpsi CO2 melalui mekanisme pertukaran ion di suatu kolom adsorpsi telah dibuat. Model ini dibuat untuk mencari konstanta yang dapat dipergunakan pada proses scale up data laboratorium ke skala pilot plant. Parameter proses kecepatan yang dicari nilainya adalah koefisien transfer massa massa volumetris CO2 pada fase cair (kLa), koefisien transfer massa volumetris CO2 pada fasegas (kGa) dan tetapan laju reaksi (k1 dan k2). Pada hasil penelitian ini ditunjukkan bahwa nilai parameter yang diperoleh sesuai hasil fitting data dengan model matematis yang digunakan, yaitu model transfer massa pada lapisan film antar fase secara seri: adalah kGa, kla, k1 dan k2  dengan nilai Sum of Squares Error (SSE) rata-rata 0,0431. Perbandingan nilai kGa hasil simulasi dan teoritisnya memberikan kesalahan rata-rata 18,79%. Perbandingan nilai kLa hasil simulasi dan teoritis memberikan kesalahan rata-rata 7,92%.Kata kunci: model matematis, adsorpsi CO2, pemurnian biogas

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