caa a22 4500 463220188 CHVBK 20180405153209.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1134/S1061934807080102 doi (NATIONALLICENCE)springer-10.1134/S1061934807080102 Quantitative chromatographic analysis under changes in the composition of samples in the course of sample preparation: A modification of the double internal standard method [Elektronische Daten] [I. Zenkevich, E. Makarov, I. Makarova] A well-known method of quantitative chromatographic analysis—the double internal standard method—is modified. This modification consists in the use of two analyte homologs (preceding and following ones) as standard substances. This approach can be used to compensate for considerable losses of both test components and standard substances in the course of various sample preparation procedures. The advantages of this method are illustrated using liquid extraction, vapor-phase analysis, distillation of volatile components with volatile solvents (preconcentration in a condensate), and evaporation of volatile solvents (preconcentration in a distillation residue) as examples. The method proposed maintains a high precision of determinations (the relative error (c specified − c found)/c specified is 1-6%). Pleiades Publishing, Ltd., 2007 Zenkevich I. Chemistry Research Institute, St. Petersburg State University, Universitetskii pr. 26, 198504, Petrodvorets, Russia aut Makarov E. Chemistry Research Institute, St. Petersburg State University, Universitetskii pr. 26, 198504, Petrodvorets, Russia aut Makarova I. Chemistry Research Institute, St. Petersburg State University, Universitetskii pr. 26, 198504, Petrodvorets, Russia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/8(2007-08-01), 748-755 1061-9348 62:8<748 2007 62 10809 https://doi.org/10.1134/S1061934807080102 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807080102 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zenkevich I. Chemistry Research Institute, St. Petersburg State University, Universitetskii pr. 26, 198504, Petrodvorets, Russia aut NATIONALLICENCE 700 1- Makarov E. Chemistry Research Institute, St. Petersburg State University, Universitetskii pr. 26, 198504, Petrodvorets, Russia aut NATIONALLICENCE 700 1- Makarova I. Chemistry Research Institute, St. Petersburg State University, Universitetskii pr. 26, 198504, Petrodvorets, Russia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/8(2007-08-01), 748-755 1061-9348 62:8<748 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer