Deformed coherent and squeezed states of multiparticle processes

Deformed squeezed states are introduced as the q-analogues of the conventional undeformed harmonic oscillator algebra squeezed states. It is shown that the boundary vectors in the matrix-product states approach to multiparticle diffusion processes are deformed coherent or squeezed states of a deformed harmonic oscillator algebra. A deformed squeezed and coherent-states solution to the n-species stochastic diffusion boundary problem is proposed and studied.Received: 31 January 2003, Published online: 10 October 2003     

Direct analysis of bottom sediments by a microcoulometric titration method for determination of total organic halide pollutants

Up to now the content of the organic halides in sediments was measured as extractable organic halides compounds by different methods including microcoulometric titration one. We describe a procedure for microcoulometric determination of total organic halide pollutants by using a direct combustion of the sediments into the microcoulometric system furnace. An accelerated removal of the inorganic chlorides by reaction with potassium nitrate using ultrasonic radiation was attained. The procedure was validated for analysis of bottom sediments from natural and anthropogenic sources. The repeatability RSD = 8.5%, the expanded relative uncertainty U (n = 7, P = 95%, k = 2) = 6.4%, the reproducibility RSD was within the range 10.0–7.3%, the average recovery R = 97.6% and method LOD = 11 mg kg⁻¹ Cl. Correspondence: Zara V. Aneva, Analytical Department, University “Prof. Dr. Assen Zlatarov”, Nr. 1 Prof. Yakimov street, 8010 Bourgas, Bulgaria     

Symmetry of the Riemann operator

Chaos quantization conditions, which relate the eigenvalues of a Hermitian operator (the Riemann operator) with the non-trivial zeros of the Riemann zeta function are considered, and their geometrical interpretation is discussed.     

Exact solvability of open stochastic systems

It is shown that the boundary vectors in the matrix-product states approach to open stochastic diffusion processes are deformed coherent states of a deformed harmonicoscillator algebra. A unified deformed coherent states solution to the partially and totally asymmetric diffusion boundary problem is proposed and studied.     

Synergetic extraction of platinum(IV) from dilute hydrochloric acid by isoamyl alcohol — Methylisobutylketone mixture

A synergetic extraction system isoamyl alcohol-methylisobutylketone for the quantitative separation of platinum as a matrix component from the attending microimpurities is developed. The influence of the different factors on the extraction efficiency is studied. At optimum conditions, the platinum extraction is over 99%; Al, Ca, Mg, Mn, Ni, Cr are quantitatively retained in the aqueous phase. Cu and Pb are partially extracted but the distribution coefficients are constant, independent of the metals concentration. Investigations are made to explain the synergetic extraction mechanism. This method is recommended for the concentration of microimpurity elements in the analysis of pure platinum.     

Graphite furnace atomic absorption spectrometric determination of iridium,rhodium and ruthenium in high-purity platinum after matrix extraction

Ir, Rh and Ru are separated from a large excess of platinum by extraction with isoamyl alcohol-isobutyl methyl ketone mixture. Graphite furnace atomic absorption spectrometry using the method of standard addition is then used to determine the metals with satisfactory precision and accuracy.     

Simultaneous extraction and determination of traces of lead and arsenic in petrol by electrothermal atomic absorption spectrometry

The lead and arsenic compounds are converted to water-soluble iodides by reaction with a solution of iodine in toluene extraction into dilute nitric acid before determination by graphite-furnace atomic absorption spectrometry against aqueous standards. The method is simple, rapid, accurate and reasonably precise.     

Direct flame atomic absorption spectrometric determination of bismuth,cadmium, cobalt,silver, palladium and zinc in pure platinum with pulse aspiration

The method involves pulse aspiration of samples in ethanolic 3 M hydrochloric acid solutions. The detection limits vary from 1×10^?5 to 2×10^?4%. The depressive effect of platinum is corrected mathematically, so that standard additions or matrix matching are unnecessary.