caa a22 4500 463218493 CHVBK 20180405153205.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1134/S106193480701008X doi (NATIONALLICENCE)springer-10.1134/S106193480701008X Blister-colorimetric determination of phosphate ions in water, agricultural samples, and biological samples [Elektronische Daten] [D. Knyazev, A. Zhevnerov, V. Ivanov, V. Knyazev] A procedure was proposed for the determination of phosphate ions in a blister cell (pellet cartridge) with a dry reagent mixture. The procedure is suitable for the quantitative determination of phosphate in different samples using a dry reagent mixture in an ampule or a blister without dissolving the reagents. After an ampule or a blister cell was opened and several drops of a test liquid were added, a color developed, whose intensity was proportional to the concentration of phosphate ions in the solution. The solution was then diluted to 2 mL with water and analyzed by photometry. The composition of the mixture was determined, and the procedure for the quantitative determination of phosphate ions was proposed; the procedure involves the formation and reduction of phosphomolybdic acid and the use of auxiliary reagents. The error of the colorimetric determination of phosphate ions in aqueous solutions, soil extracts, and urine was estimated with the participation of inexperienced operators. Pleiades Publishing, Ltd., 2007 Knyazev D. Timiryazev Agricultural Academy, Russian Academy of Sciences, ul. Timiryazeva 49, 127550, Moscow, Russia aut Zhevnerov A. Timiryazev Agricultural Academy, Russian Academy of Sciences, ul. Timiryazeva 49, 127550, Moscow, Russia aut Ivanov V. Department of Chemistry, Moscow State University, 119899, Vorob'evy gory, Moscow, Russia aut Knyazev V. Department of Chemistry, Catholic University of America, Washington, DC, USA aut Journal of Analytical Chemistry Nauka/Interperiodica 62/1(2007-01-01), 37-41 1061-9348 62:1<37 2007 62 10809 https://doi.org/10.1134/S106193480701008X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S106193480701008X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Knyazev D. Timiryazev Agricultural Academy, Russian Academy of Sciences, ul. Timiryazeva 49, 127550, Moscow, Russia aut NATIONALLICENCE 700 1- Zhevnerov A. Timiryazev Agricultural Academy, Russian Academy of Sciences, ul. Timiryazeva 49, 127550, Moscow, Russia aut NATIONALLICENCE 700 1- Ivanov V. Department of Chemistry, Moscow State University, 119899, Vorob'evy gory, Moscow, Russia aut NATIONALLICENCE 700 1- Knyazev V. Department of Chemistry, Catholic University of America, Washington, DC, USA aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/1(2007-01-01), 37-41 1061-9348 62:1<37 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer