Arc Atomic-Emission Digital Spectrography of Liquid Biosamples Using MAES
Abstract
Results of studying an analytical potential of atomic (optical) emission digital spectrography with DC arc excitation of the spectrum of dried residue of liquid samples are presented. The results have been obtained on a MFS-8 spectral device modified with photodiode linear detector MAES. A possibility of increasing signal-to-noise ratio using higher arc current strength (20 A) and large amount of spectral buffer (0.15 mg NaCl) is shown. A universal technique of liquid biological samples analysis is developed using aqueous solutions of the salts of the elements as standard samples. The absence of the matrix impact is demonstrated in analysis of human saliva with dilution-addition method. The developed technique provides determination of a number of elements starting from n × 10-7 g/liter in the sample n × 10 μl with the reproducibility less than 15 - 20 rel.%. Linear dynamic range of calibration curve is 3 - 4 orders of the concentration of the elements to be determined.
About the Authors
A. I. Drobyshev
ФГБОУ ВПО Санкт-Петербургский государственный университет
Russian Federation
Russian Federation
S. S. Savinov
ФГБОУ ВПО Санкт-Петербургский государственный университет
Russian Federation
Russian Federation
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Review
For citations:
Drobyshev A.I., Savinov S.S. Arc Atomic-Emission Digital Spectrography of Liquid Biosamples Using MAES. Industrial laboratory. Diagnostics of materials. 2015;81(1):142-145. (In Russ.)
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