Tri-n-butylphosphate

At trace levels, polonium can be separated effectively by solvent extraction, ion exchange, paper chromatography, and other techniques. Diisopropyl ketone, di-n-octylamine, and tri-n-butylphosphate are suitable solvents for extraction. Trace amounts of polonium in solutions or sohd mixtures containing no other emitters can be determined by measuring its alpha activity. 

Nave, A., Mandin, C., Martinet, L. et al. 2004. Supramolecular organization of tri-n-butylphosphate in organic diluent on approaching third phase transition. Phys. Chem. Chem. Phys. 6 799-808. 

Trofimov, T.I. Samsonov, M.D. Kulyako, Y.M. Myasoedov, B.F. Dissolution and extraction of actinide oxides in supercritical carbon dioxide containing the complex of tri-n-butylphosphate with nitric acid, C.R. Chimie 7 (2004) 1209-1213. 

M. Baaden, R. Schurhammer, and G. Wipff. Molecular dynamics study of the uranyl extraction by tri-n-butylphosphate (TBP) Demixing of water/oil/TBP solutions with a comparison of supercritical C02 and chloroform. J. Phys. Chem. B, 106(2) 434-441, 2002. 

Baaden, M., Schurhammer, R., Wipff, G. (2002), Molecular Dynamics Study of the Uranyl Extraction by Tri-n-butylphosphate (TBP) Demixing of Water/"Oil"/TBP Solutions with a Comparison of Supercritical CO2 and Chloroform, J. Phys. Chem. B 106, 434-441. 

Butts, W. C., Banks, C. V. Solvent extraction and gas chromatography of the rare earth mixed-ligand complexes of hexafluoroacetylacetone and tri-n-butylphosphate. Anal. Chem. 42, 133 (1970). 

Dimercaptotoluene(DMT) 3,4-dithiotoluene Hexachlorobenzene 50 ng/ml (ng/microliter) in dichloromethane Test mixture solution containing 12.5 40 p.g ml-1 (microgram per milliliter) each in dichloromethane of Trimethylphosphate 2,6-Dimethylphenol 5-Chloro-2-methylaniline Tri-n-butylphosphate 1ml 5-g 2ml 2ml... 

A column performance test is used to ensure the proper condition of columns and the stability of retention parameters. Because CWC-related chemicals greatly differ both chemically and physically from each other, the test chemicals have been selected so that their physical, chemical, and retention properties are different, and so that they elute evenly over the whole chromatogram. The use of the following chemicals in a column performance test is recommended trimethylphosphate, 2,6-dimethylphenol, 5-chloro-2-methylaniline, tri-n-butylphosphate, dibenzothiophene, malathion, and methyl stearate. The concentration of test chemicals depends on the sensitivity of detectors. The... 

A key factor in the QA program is the performance control of the instrumentation. A number of test compounds have been recommended for checking the performance of a GC/MS instrument for the analysis of scheduled chemicals (34). These include DMMP, DMMP-rf9, trimethylphosphate, 2,6-dimethylphenol, 5-chloro-2-methylaniline, tri-n-butylphosphate, dibenzothiophene, malathion, and methyl stearate. DMMP is a moderately polar compound and is considered to be a good test compound for checking the GC performance. The deuterated form is recommended because it does not give cross-contamination in the analysis of authentic samples. However, because no scheduled chemicals can be brought on-site during an inspection, the use of DMMP-<79 has been replaced by trimethylphosphate for on-site analysis. The correctness of the intensity ratios in the El mass spectra can be verified by means of the test compounds with the different isotopic peaks 5-chloro-2-methylaniline... 

Chaudry, M.A., Islam, N.U., and Mohammad, D., Uranium(VI) transport through tri-n-butylphosphate kerosene oil hquid membrane supported in polypropylene Hhn. J. Radioanal. Nucl. Chem., 1987, 109 11-22. 

O Laughlin, J. W., O Brien, T. P. Synergic extraction of zinc, cadmium and lead with hexafluoroacetylacetone and di-n-butylsulphoxide and tri-n-butylphosphate and the gas-chromatography of the zinc adduct Talanta 22, 587 (1975)... 

In the production of uranium(lV) oxide in the wet process, the uranium concentrate is first converted into a uranyl nitrate solution with nitric acid. After the purification of the uranyl nitrate by solvent extraction, it can be converted into uranium(IV) oxide by two different routes either by thermal denitration to uranium(VI) oxide which is then reduced to uranium(IV) oxide or by conversion of uranyl nitrate into ammonium diuranate which is reduced to uranium(IV) oxide. Purification proceeds by extraction of the uranyl nitrate hydrate from the acidic solution with tri-n-butylphosphate in kerosene and stripping this organic phase with water, whereupon uranium goes into the aqueous phase. 

We have used tri-n-octylphosphine oxide (TOPO) as a solvent extractant of uranium(VI) and thorium(IV) from nitric and hydrochloric acid solutions (1-3). In contrast, the extraction of uranium(VI) and thorium(IV) from nitric and hydrochloric acid solutions has been investigated by tri-n-butylphosphate (TBP) (4, 5). However, since TBP reveals a poor efficiency for the extraction of metals from sulphuric acid solutions, this paper extends the work to the extraction of uranium(VI) from sulphuric acid solutions by TOPO. 

Phosphate esters Tri-n-butylphosphate T ripheny Ipho sphate Tricresy Ipho sphate... 

N-Methylpyrrolidone, NMP b) Triethylphosphate b) Tri-n-butylphosphate, TBP b) Tri-iso-butylphosphate b) Tris(2-chloroethyl)phosphate, TCEPb) Tris(chloropropyl)phosphates (2 isomers), TCPPb) Tris(butoxyethoxy)phosphatesb) Dimethylphthalate b)... 

Additionally, the bound fraction of numerous further anthropogenic contaminants were investigated by quantitation of the extractable and nonextractable matter. The selection of the contaminants (including chlorinated and brominated naphthalenes, 2,4,6-tribromoaniline, mono-and dibrominated phenols, phthalates, tri-n-butylphosphate, 2,4,4-trimethylpentane-l,3-dioldi-Ao-butyrate, bisphenol A, butylated nitrophenols, 4-nitrobenzoic acid, galaxolide and tonalide) was based on the results of extended GC-MS-screening analyses applied to the extracts of the sediment samples as well to the extracts derived from selective chemical degradation procedures. 

In order to discern the discussed Elbe marker compounds from nonmarker substances several nonspecific contaminants were analysed additionally. These contaminants include galaxolide, tonalide, tri-n-butylphosphate, 2,4,4-trimethylpentane-1,3-dioldi-iso-butyrate and... 

The distribution ratio between 3 M HCl and tri-n-butylphosphate for PdCla is 2,3. What percent PdCl2 will be extracted from 25.0 mL of a 7.0 X 10"" M solution into 10,0 mL tri-n-butylphosphate ... 

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