Analytical application of high-molecular quaternary ammonium salts

Рахманько, Е. М.; Starobinets, G. L.; Yegorov, V. V.; Gulevich, A. L.; Lestchev, S. M.; Borovski, E. S.; Tsyganov, A. R.

doi:10.1007/bf00482401

Cited by 9 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Silica gel L 40/100 was from Chemapol (Prague, Czech Republic). The QAS didecylaminoethyl-b-tridecylammonium iodide (I) and N-methyl-N,N,NA,NA,NA-pentadecylethyldiammonium diiodide (II) were synthesized as described elsewhere 12 and were used for preparing the modified silica gel. Modified silica gels (I-SG and II-SG) with QAS contents of 0.12 and 0.012 mmol g 21 , respectively, were obtained as described in ref.…”

Section: Reagentsmentioning

confidence: 99%

Solid-phase reagents for the determination of anionic surfactants in water

Zaporozhets¹,

Nadzhafova²,

Verba³

et al. 1998

Analyst

View full text Add to dashboard Cite

Sorption-spectrometric methods for the determination of anionic surfactants (A Surf) in natural and waste water using silica gel (SG) loaded with ion-pair associates of high molecular weight quaternary ammonium salts (QAS) and anionic dyes were developed. For this purpose, the interaction of Methyl Orange (MO), sodium picrate (Picr) and fluorescein (Fl) with didecylaminoethyl-btridecylammonium iodide (I) and N-methyl-N,N,NA,NA,NApentadecylethyldiammonium diiodide (II) immobilized on the surface of SG was investigated. SG loaded with I-MO and I-Fl associates was used for the determination of sodium dodecyl sulfate (SDS) in natural and waste water using absorbance, diffuse reflectance spectrometric and luminescence methods. Detection limits were 0.05 and 0.01 ppm, respectively. Humic and fulvic acids at levels < 0.5 ppm did not interfere with SDS determination. Water with higher acid contents was analysed using SG modified with the II-Picr associate at pH 2. Visual test scales for SDS determination in water at one fifth of the maximum admissible concentration (MAC) level was prepared.

show abstract

Section: Reagentsmentioning

confidence: 99%

Solid-phase reagents for the determination of anionic surfactants in water

Zaporozhets¹,

Nadzhafova²,

Verba³

et al. 1998

Analyst

View full text Add to dashboard Cite

show abstract

“…One more example is the values of the single-ion partition coefficients given in [ 28 ] and [ 32 ], which differ by more than an order of magnitude for iodide and more than 2.5 orders of magnitude for nitrate. According to [ 32 ], I − and

Section: Resultsmentioning

confidence: 93%

“…According to [ 32 ], I − and

ions are approximately equally extractable, which contradicts experimental results on ion-exchange constants and unbiased selectivity coefficients for electrodes based on QAS [ 45 ]. According to [ 45 ], the iodide ion is 1.3 orders of magnitude more lipohilic than the nitrate ion. The last value corresponds well to the differences in single-ion partition coefficients for iodide and nitrate equal to 1.6 and 1.5 logarithmic units, obtained in [ 28 ] and in the present paper, respectively.…”

Section: Resultsmentioning

confidence: 93%

Determination of Single-Ion Partition Coefficients between Water and Plasticized PVC Membrane Using Equilibrium-Based Techniques

Siamionau

Егоров

2022

Membranes

View full text Add to dashboard Cite

An experimentally simple method for the direct determination of single-ion partition coefficients between water and a PVC membrane plasticized with o-NPOE is suggested. The method uses the traditional assumption of equal single-ion partition coefficients for some reference cation and anion, in this case tetraphenylphosphonium (TPP+) and tetraphenylborate (TPB−). The method is based on an integrated approach, including direct study of some salts’ distribution between water and membrane phases, estimation of ion association constants, and measurements of unbiased selectivity coefficients for ions of interest, including the reference ones. The knowledge of distribution coefficients together with ion association constants allows for direct calculation of the multiple of the single-ion partition coefficients for the corresponding cation and anion, while the knowledge of unbiased selectivity coefficients together with ion association constants allows for immediate estimation of the single-ion partition coefficients for any ion under study, if the corresponding value for the reference ion is known. Both potentiometric and extraction studies are inherently equilibrium-based techniques, while traditionally accepted methods such as voltammetry and diffusion are kinetical. The inner coherent scale of single-ion partition coefficients between water and membrane phases was constructed.

show abstract

“…The excellent capacity of high molecular weight quaternary ammonium salts for removing metals in the form of complex anions [11][12][13][14][15] and their selectivity with regards to such anions depending on the ligand accompanying the metal and its stability constant are also reported in specialised literature. Such metals, i.e.…”

Section: Introductionmentioning

confidence: 99%

Use of modified silica gel for concentrating Pb (II) and Cd (II) occurring in form of complex anions

et al. 2007

View full text Add to dashboard Cite

The performance of silica gel, modified by the impregnation with a high molecular weight quaternary amine (triethyl octadecyl ammonium iodide), used for the concentration of heavy metals occurring in water is studied. The material under study captures Cd, Pb, which are capable of forming stable complexes with Iions.The results obtained about the metal capture, under dynamic conditions, are described and metal ions are removed by desorption with EDTA and quantified by AAS.

show abstract

Analytical application of high-molecular quaternary ammonium salts

Cited by 9 publications

References 0 publications

Solid-phase reagents for the determination of anionic surfactants in water

Solid-phase reagents for the determination of anionic surfactants in water

Determination of Single-Ion Partition Coefficients between Water and Plasticized PVC Membrane Using Equilibrium-Based Techniques

Use of modified silica gel for concentrating Pb (II) and Cd (II) occurring in form of complex anions

Contact Info

Product

Resources

About