A new Zeeman electrothermal atomic-absorption spectrometer: technology and analysis

The technical parameters and analytical characteristics of a new Zeeman atomic-absorption spectrometer (the Quant Z) are presented. The characteristic masses and the limits of the detection of certain elements of the new instrument are compared with those of similar instruments.     

Determination of nanoparticle dimensions in colloidal solutions with elemental analysis in an electrothermal atomic-absorption spectrometer

A method is proposed for evaluating nanoparticle dimensions based on the difference in atomization kinetics for true and colloidal solutions in graphite furnaces of atomic-absorption spectrometers. The method makes it possible not only to analyze the elemental composition of colloidal nanoparticles, but also to determine their dimensions. It is proven for spherical colloidal gold particles.     

Calculation of the Background Correction Error in Electrothermic Atomic Absorption Spectrometry

A theoretical estimate is presented of the background correction error in electrothermic atomic absorption spectrometry with modulation of the coefficient of atomic absorption in an alternating magnetic field. The experimental results for the background absorption induced by scattering of radiation are in good agreement with theory. Substantial additional distortions in the output signal due to interaction of molecular vapor with the graphite surface arise in the case of a molecular background.     

Optimization of Signal Processing Algorithm in Electrothermal Atomic-Absorption Spectrometry

Algorithms for processing signals in electrothermal atomic-absorption spectrometry are considered on the basis of mathematical simulation. A new processing algorithm based on interpolation of absorption signals by means of the Arrhenius' equation is developed. The optimality of the new algorithm is confirmed by means of physical measurements.     

Ensuring Common Standards of Measurements in Analytical Spectrophotometry

Activity at the VNIIOFI on developing methods and apparatus for atomic-absorption spectroscopy with flame and electrical atomization, and also absorption and fluorescence spectrophotometry in the ultraviolet-visible and near infrared bands is reviewed. __________ Translated from Izmeritel'naya Teknika, No. 11, pp. 65–68, November, 2005.     

Monochromatization of resonance radiation in Zeeman atomic absorption spectrometry

Two methods of background correction in atomic absorption spectrometry with nonselective atomic effects are investigated: first, with a source possessing a continuous spectrum and, second, that of correction based on the Zeeman effect. The parameters of the monochromator, which was developed expressly for Zeeman atomic absorption spectrometry, are considered. __________ Translated from Izmeritel’naya Tekhnika, No. 9, pp. 20–24, September, 2007.     

Problems of procedure support of biomedical nanotechnologies

Results that were obtained in the course of the development of techniques for use in the measurement of the dimensions, numerical concentrations, element composition, and degree of aggregation of nanoparticles in aqueous and saline solutions and biological fluids (whole blood and plasma) as well as in the determination of the efficiency of the penetration of nanoparticles through biological barriers are set forth. The results were obtained through the use of methods of atomic absorption spectrometry, dynamic light scattering, absorption spectrophotometry, and resonance light scattering spectroscopy.