By R. Přibil, R. Belcher, H. Freiser
Analytical functions of EDTA and comparable Compounds examines the analytical purposes of ethylenediaminetetra-acetic acid (EDTA) and similar compounds. This ebook additionally considers the “passive” function of those components, that's, their screening (masking) homes, which significantly increase the selectivity of the reactions in universal use.
This textual content contains six chapters geared up into sections. the 1st half offers with the makes use of of EDTA and its derivatives in a few fields of chemical research. After supplying an outline of the historical past at the back of the improvement of EDTA as an analytical reagent, this ebook discusses to the character of equilibria of complexes and the equipment utilized in their research. the following bankruptcy is devoted to the reactions of “classical” gravimetric research, together with the precipitation reactions through natural reagents. The bankruptcy on colorimetry contains a part on “colored complexing agents,” which are used additionally in colorimetric determinations of a few parts. this article concludes by way of comparing using EDTA as a covering agent in colorimetry.
This e-book might be of curiosity to scholars and practitioners operating in analytical chemistry and similar disciplines, together with polarography, chromatography, electrophoresis, flame photometry, and qualitative research.
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Extra info for Analytical Applications of EDTA and Related Compounds
The rate constant of the main exchange reaction (X) was found to be = 1-5 X 1 0 - M mole-^ m i n - \ As one can see from the examples, chelate complexes are characterized generally by slow reactions. t Nevertheless, the formation a n d decomposition of complexes with several chelate rings is in itself a special kinetic factor in both types of complexes and equivalent to the effect of the electronic configuration. REFERENCES 1. 2. 3. 4. 5. 6. 7. S C H W A R Z E N B A C H , G . , Hauptvortrag, Wintersammlung der Schweiz.
The wave of the irreversible reduction of the vanadium complex (VO^"^) to is irregular in shape (according to Pecsok and Juvet  there are actually two waves; see also ). The reversible systems E u Y ^ / E u Y ^ "  and N b ^ - N b ^ ^ (as their complexes with E D T A ) were studied in a similar manner. The half-wave reduction potentials of E D T A complexes with different metal ions are given in Table IV and Fig. 14. The values obtained without E D T A in the medium a n d with lO-^M E D T A are given in the Table for comparison.
PECSOK, R . L . and MAVERICK, E . F . , Τ. Am. Chem. Soc. 7 6 , 3 5 8 ( 1 9 5 4 ) . PECSOK, R . L . and JUVET, R . , / . Am. Chem. Soc. 7 5 , 1 2 0 2 ( 1 9 5 3 ) . 5 9 . MiCKA, K . and TOCKSTEIN, Α . , Chem. listy 4 8 , 6 4 8 ( 1 9 5 4 ) . 6 0 . ECKARDT, D . and HOLLECK, L . , Z . Elektrochem. 5 9 , 2 0 2 (1955). 6 1 . MATYSKA, B . and KÖSSLER, L , Chem. listy 4 5 , 2 5 4 ( 1 9 5 1 ) ; Coll. Czech. Chem. Comm. 1 6 , 2 2 1 ( 1 9 5 1 ) . 6 2 . G o F F A R T , J . , MICHEL, G . and DUYCKHAERTS, G .