Acetic Acid–Ammonium Acetate Buffer TS

2021 ◽  
Keyword(s):  
Acetic Acid ◽  
Ammonium Acetate ◽  
Acetate Buffer ◽  
Ammonium Acetate Buffer

scholarly journals CENTRAL COMPOSITE DESIGN APPLIED IN HPLC OPTIMIZATION FOR ANALYSIS OF TARTRAZINE AND AURAMINE O IN POWDER DRINKS

2019 ◽  
pp. 211-215
Author(s):  
ANNISA DYAH LESTARI ◽  
Abdul Rohman ◽  
SUDIBYO MARTONO
Keyword(s):  
Central Composite Design ◽  
Flow Rate ◽  
Retention Time ◽  
Mobile Phase ◽  
Ammonium Acetate ◽  
Acetate Buffer ◽  
Ammonium Acetate Buffer ◽  
Acetate Concentration ◽  
Rp Hplc ◽  
Central Composite

Objective: This study was intended to optimize reversed-phase high-performance liquid chromatography (RP-HPLC) method for the determination of Tartrazine (TAR) and Auramin O (AUO) in powder drinks using experimental design of central composite design (CCD) approach. Methods: TAR and AUO in powder drink product has same properties, therefore both analytes were analysed using C18 column (XBridge Shield RP 18 250 mm x 4.6 mm i.d., 5 µm) using Shimadzu LC 20AD chromatograph equipped with photo-diode array (PDA) detector at 300-650 nm. Some factors responsible for RP-HPLC separation of TAR and AUO including the concentration of buffer, the ratio of mobile phase and flow rate were optimized using CCD. The responses evaluated were peak area, retention time, and tailing factor. The mobile phase used was acetonitrile and ammonium acetate buffer, and acetonitrile composition was optimized at 84-86% for separation of TAR and AUO, delivered at a flow rate of 0.8–1.2 ml/min, using ammonium acetate buffer at 19-21 mmol. Results: CCD showed that separation of TAR and AUO was influenced by flow rate, the ratio of acetonitrile and ammonium acetate concentration. These factors affected significantly to retention time, peak area, and tailing factor. The optimal condition obtained based on CCD was flow rate of 1.2 ml/min, the ratio of acetonitrile 86%, and ammonium acetate concentration of 19 mmol. Conclusion: CCD can be used to get optimum condition for analysis of TAR and AUO in powder drink product.

Separation of trivalent actinides from lanthanides in an acetate buffer solution using Cyanex 301

2006 ◽  
Vol 94 (5) ◽  
Author(s):  
Jack D. Law ◽  
Dean R. Peterman ◽  
Terry A. Todd ◽  
Richard D. Tillotson
Keyword(s):  
Acetic Acid ◽  
Ammonium Acetate ◽  
Separation Process ◽  
Acetate Buffer ◽  
Acetate Buffer Solution ◽  
Buffer Solution ◽  
Strip Solution ◽  
Trivalent Actinides ◽  
Separation Factors ◽  
Cyanex 301

SummaryThe separation of trivalent actinides from the lanthanides using the active extractant in the Cyanex 301 reagent, bis(2,4,4-trimethylpentyl)dithiophosphinic acid, was studied. Specifically, the extractant was studied with an ammonium acetate/acetic acid buffered feed that would result from a transuranic separation process utilizing an ammonium acetate strip solution. Separation factors of

scholarly journals DETERMINATION OF Cu(II) CONCENTRATION IN AQUEOUS MEDIUM USING INVERSION ELECTROCHEMICAL METHOD

2019 ◽  
Vol 85 (9) ◽  
pp. 58-64
Author(s):  
Vera Vorobets ◽  
Gennadii Kolbasov ◽  
Sergii Fomanyuk ◽  
Nataliia Smirnova ◽  
Oksana Linnik
Keyword(s):  
Formic Acid ◽  
Ammonium Acetate ◽  
Copper Ions ◽  
Stripping Voltammetry ◽  
Acetate Buffer ◽  
Background Solution ◽  
Ammonium Acetate Buffer ◽  
Photoelectrochemical Method ◽  
Determination Of Copper

Electrode materials based on titanium dioxide modified with zinc ions and gold nanoparticles, synthesized by sol-gel method, were used to determine the concentration of Cu (II) in liquids by stripping voltammetry method. Determination of Cu (II) was done using background solutions based on 0.4 M formic acid and ammonium acetate buffer (pH = 7.5) using the standard addition method with a potential scanning speed of 50 mV•s-1. The solution was stirred during the preliminary electrolysis at a potential of -1400 mV (vs silver-chloride reference electrode) for 120 seconds and then the potential was scanned from -1200 mV to + 200 mV. It is shown that the background solution based on ammonium acetate buffer provides a higher sensitivity and a good selectivity of peaks for the determination of copper compared to the background solution based on formic acid. Determined that value of the analytical signal of copper in the studied model solutions based on ammonium acetate and formic acid is proportional to the concentration of copper ions in the solution. To increase the selectivity of stripping voltammetry method in determining copper concentrations in solutions, an inversion spectral photoelectrochemical method was proposed, the essence of which is preliminary electroconcentration of the elements under investigation in the cathode potential region and subsequent measurement of the spectral photoelectrochemical characteristics of electroconcentration products. It has been found that in solutions of 1M ammonium acetate containing Cu2+ ions, the cathodic polarization of TiO2-based photoelectrode leads to the appearance of a cathode photocurrent and the values of photocurrent quantum yield increase with increasing content of copper ions in the solution. The spectral sensitivity of the surface layer corresponds to the absorption spectrum of Cu2O. The sensitivity of stripping voltammetry method to copper Cu (II) using the materials studied was 0.3 mg•l-1. It is shown that the inversion photoelectrochemical method is promising in the selective determination of copper concentration in liquids.

scholarly journals Sequential Extraction of Potentially Toxic Metals: Alteration of Method for Cu-Ni Polluted Peat Soil of Industrial Barren

Toxics ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 39
Author(s):  
Marina V. Slukovskaya ◽  
Irina P. Kremenetskaya ◽  
Svetlana V. Drogobuzhskaya ◽  
Andrey I. Novikov
Keyword(s):  
Ammonium Acetate ◽  
Peat Soil ◽  
Soil Treatment ◽  
Water Soluble ◽  
Acetate Buffer ◽  
Peat Soils ◽  
Ammonium Acetate Buffer ◽  
Fraction Composition ◽  
Metal Fraction

An evaluation of fraction composition and transformation of metal compounds emitted by metal ore processing enterprises and accumulated in soils is crucial for assessing the environmental risks of pollution and ecosystem benefit of remediation. The aim of this study was to develop a suitable sequential fractional procedure for metal pollutants for the peat soils matrix in the impact zone of a Cu-Ni smelter. Three experiment series were performed: (a) the study of the effect of ammonium acetate buffer pH in the range of 3.7–7.8 on the soil metal extraction; (b) the study of the effect of additional volume and frequency of soil treatment with solutions on the content of water-soluble, ammonium acetate extractable, and 0.1 N HNO3 extractable fractions; and, (c) the determination of the metal fraction composition in the modified technique. Soil treatment with ammonium acetate buffer with a pH range of 4.5–5.5 was the most appropriate for the determination of mobile compounds of Cu and other metals in highly polluted peat soil. Triple soil treatment with water and ammonium acetate is necessary for the complete extraction of the water-soluble and exchangeable fractions, respectively. Additionally, we propose a procedure of full extraction of the exchangeable metal fraction from peat soils while using single treatment with 0.1 N HNO3. This scheme allows evaluating geochemical mobility of metals and current environmental harm of polluted soils with a high content of organic matter.

scholarly journals DETERMINATION OF CU(II) CONCENTRATION IN AQUEOUS MEDIUM USING INVERSION ELECTROCHEMICAL METHOD

2019 ◽  
Vol 85 (7) ◽  
pp. 24-30
Author(s):  
Vera Vorobets ◽  
Gennadii Kolbasov ◽  
Sergii Fomanyuk ◽  
Nataliia Smirnova ◽  
Oksana Linnik
Keyword(s):  
Formic Acid ◽  
Ammonium Acetate ◽  
Copper Ions ◽  
Stripping Voltammetry ◽  
Acetate Buffer ◽  
Background Solution ◽  
Ammonium Acetate Buffer ◽  
Photoelectrochemical Method ◽  
Determination Of Copper

Electrode materials based on titanium dioxide modified with zinc ions and gold nanoparticles, synthesized by sol-gel method, were used to determine the concentration of Cu (II) in liquids by stripping voltammetry method. Determination of Cu (II) was done using background solutions based on 0.4 M formic acid and ammonium acetate buffer (pH = 7.5) using the standard addition method with a potential scanning speed of 50 mV•s-1. The solution was stirred during the preliminary electrolysis at a potential of -1400 mV (vs silver-chloride reference electrode) for 120 seconds and then the potential was scanned from -1200 mV to + 200 mV. It is shown that the background solution based on ammonium acetate buffer provides a higher sensitivity and a good selectivity of peaks for the determination of copper compared to the background solution based on formic acid. Determined that value of the analytical signal of copper in the studied model solutions based on ammonium acetate and formic acid is proportional to the concentration of copper ions in the solution. To increase the selectivity of stripping voltammetry method in determining copper concentrations in solutions, an inversion spectral photoelectrochemical method was proposed, the essence of which is preliminary electroconcentration of the elements under investigation in the cathode potential region and subsequent measurement of the spectral photoelectrochemical characteristics of electroconcentration products. It has been found that in solutions of 1M ammonium acetate containing Cu2+ ions, the cathodic polarization of TiO2-based photoelectrode leads to the appearance of a cathode photocurrent and the values of photocurrent quantum yield increase with increasing content of copper ions in the solution. The spectral sensitivity of the surface layer corresponds to the absorption spectrum of Cu2O. The sensitivity of stripping voltammetry method to copper Cu (II) using the materials studied was 0.3 mg•l-1. It is shown that the inversion photoelectrochemical method is promising in the selective determination of copper concentration in liquids.

Purification of Acidic Synthetic Peptides by High Performance Liquid Chromatography Using Ammonium Acetate Buffer

1988 ◽  
Vol 11 (8) ◽  
pp. 1651-1660 ◽  
Author(s):  
L. Lozzi ◽  
M. Rustici ◽  
A. Santucci ◽  
L. Bracci ◽  
S. Petreni ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Synthetic Peptides ◽  
High Performance ◽  
Ammonium Acetate ◽  
Acetate Buffer ◽  
Ammonium Acetate Buffer

Citric Acid-Ammonium Acetate Buffer

1991 ◽  
Vol 66 (1) ◽  
pp. 27-28
Author(s):  
Sharon Stegmann ◽  
Robert B. Norgren ◽  
Michael N. Lehman
Keyword(s):  
Citric Acid ◽  
Ammonium Acetate ◽  
Acetate Buffer ◽  
Ammonium Acetate Buffer
Sign in / Sign up

Export Citation Format

Share Document