caa a22 4500 46321854X CHVBK 20180405153205.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1134/S1061934807010054 doi (NATIONALLICENCE)springer-10.1134/S1061934807010054 Simple chemical method for the determination of carbon dioxide in air [Elektronische Daten] [A. Malygin, V. Ponomareva] A method was proposed for the direct determination of carbon dioxide in air using a sorption tube specially constructed for this purpose. The method is based on measuring the volume of air consumed for the neutralization of a known amount of barium oxide hydrate in the tube by carbon dioxide contained in air. The equivalence point is detected by the minimum electrical conductance of the barium hydroxide solution. To verify the accuracy of the method, a technique based on the use of a calibration mixture of air with the CO2 concentration varying by the inverse exponential law was developed. The method is suitable for the determination of CO2 in air in a wide concentration range and for the verification and calibration of indirect methods for the determination of CO2. With an insignificant decrease in accuracy, the equivalence point can be detected by the change in the color of phenolphthalein. This significantly simplifies the method and allows its wide use in practice, e.g., in laboratory works in environmental science or for demonstration purposes in educational organizations. Pleiades Publishing, Ltd., 2007 Malygin A. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut Ponomareva V. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/1(2007-01-01), 16-23 1061-9348 62:1<16 2007 62 10809 https://doi.org/10.1134/S1061934807010054 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807010054 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Malygin A. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut NATIONALLICENCE 700 1- Ponomareva V. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/1(2007-01-01), 16-23 1061-9348 62:1<16 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer