Neue Wege zur Bestimmung und Trennung der Metalle mit Hilfe von o-Oxychinolin

Berg, R.

doi:10.1007/bf01388940

Cited by 44 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inorganic analytes are normally determined by three types of amplification reactions, namely, based on precipitate exchange reaction, via heteropolyacid formation, and also by indirect amplification via organic/inorganic reagents. The last named of these three is mostly used for the indirect determination of metals (8)(9)(10)(11)(12)(13)(14). In the present study, the precipitate exchange method as discussed by Belcher et al and Weisz (1,4) has been adopted for the determination of chromium in synthetic as well as in several low alloy standard steel samples to verify its applicability.…”

Section: Introductionmentioning

confidence: 98%

Determination of Low Amount of Chromium in Alloy Steel by an Amplification Method

Sircar

Bhattacharjee

Konar

et al. 1996

Microchemical Journal

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 98%

Determination of Low Amount of Chromium in Alloy Steel by an Amplification Method

Sircar

Bhattacharjee

Konar

et al. 1996

Microchemical Journal

View full text Add to dashboard Cite

“…[108] Past research with 8-hydroxyquinoline extends back to 1881 when it was first synthesized by Bedall and Fischer. [109][110][111] It was later discovered to form insoluble chelates with many metals [112][113][114] that proved useful for quantitative determination by gravimetric means. Solvent extraction with 8-hydroxyquinoline in chloroform has been explored, [115][116][117][118][119][120][121][122][123] but this is not a highly favored option for industrial application due to the toxicity and flammability of the solvent.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium Speciation of Select Lanthanides in the Presence of Acidic Ligands in Homo- and Heterogeneous Solutions

Robinson

2011

View full text Add to dashboard Cite

This dissertation explores lanthanide speciation in liquid solution systems related to separation schemes involving the acidic ligands: bis(2-ethylhexyl) phosphoric acid (HDEHP), lactate, and 8-hydroxyquinoline. Equilibrium speciation of neodymium (Nd 3+ ), sodium (Na + ), HDEHP, water, and lactate in the TALSPEAK liquid-liquid extraction system was explored under varied Nd 3+ loading of HDEHP in the organic phase and through extraction from aqueous HCl and lactate media. System speciation was probed through vapor pressure osmometry, visible and Fourier Transform Infrared (FTIR) spectroscopy, 22 Na and 13 C labeled lactate radiotracer distribution measurements, Karl Fischer titrations, and equilibrium pH measurements. Distribution of Nd 3+ , Na + , lactate, and equilibrium pH were modeled using the SXLSQI software to obtain logK Nd and logK Na extraction constants under selected conditions. Results showed that high Nd 3+ loading of the HDEHP led to Nd 3+ speciation that departs from the ion exchange mechanism and includes formation of highly aggregated, polynuclear [NdLactate(DEHP) 2 ] x ;(with x > 1). By substituting lanthanum (La 3+ ) for Nd 3+ in this system, NMR scoping experiments using 23 Na, 31 P nuclei and 13 C labeled lactate were performed. Results indicated that this technique is sensitive to changes in system speciation, and that further experiments are warranted. In a homogeneous system representing the TALSPEAK aqueous phase, Lactate protonation behavior at various temperatures was characterized using a combination of iv potentiometric titration and modeling with the Hyperquad computer program. The temperature dependent deprotonation behavior of lactate showed little change with temperature at 2.0 M NaCl ionic strength.Cloud point extraction is a non-traditional separation technique that starts with a homogeneous phase that becomes heterogeneous by the micellization of surfactants through the increase of temperature. To better understand the behavior of europium (Eu 3+ ) and 8hydroxyquinoline under cloud point extraction conditions, potentiometric and spectrophotometric titrations coupled with modeling with Hyperquad and SQUAD computer programs were performed to assess europium (Eu 3+ ) and 8-hydroxyquinoline speciation.Experiments in both water and a 1wt% Triton X-114/water mixed solvent were compared to understand the effect of Triton X-114 on the system speciation. Results indicated that increased solvation of 8-hydroxyquinoline by the mixed solvent lead to more stable complexes involving 8hydroxyquinoline than in water, whereas competition between hydroxide and Triton X-114 for Eu 3+ led to lower stability hydrolysis complexes in the mixed solvent than in water.Lanthanide speciation is challenging due to the trivalent oxidation state that leads to multiple ligand complexes, including some mixed complexes. The complexity of the system demands well-designed and precise experiments that capture the nuances of the chemistry. This work increased the understanding of lanthanide speciation in the explo...

show abstract

“…Since the work of Berg (1) in 1927, the use of 8-hydroxyquinoline, or oxine, as a quantitative precipitant for certain metallic ions, has become definitely established among quantitative analytical procedures. This reagent is especially suitable for the determination of magnesium and the method offers distinct advantages over the classical phosphate procedure.…”

mentioning

confidence: 99%

Estimation of Magnesium in Solution of Citrate of Magnesia*

Bell¹

1942

Journal of the American Pharmaceutical Association (Scientific

View full text Add to dashboard Cite

Neue Wege zur Bestimmung und Trennung der Metalle mit Hilfe von o-Oxychinolin

Cited by 44 publications

References 0 publications

Determination of Low Amount of Chromium in Alloy Steel by an Amplification Method

Determination of Low Amount of Chromium in Alloy Steel by an Amplification Method

Equilibrium Speciation of Select Lanthanides in the Presence of Acidic Ligands in Homo- and Heterogeneous Solutions

Estimation of Magnesium in Solution of Citrate of Magnesia*

Contact Info

Product

Resources

About