Potentiometry titrations

Riley, T. Watson, A., Polarography and Other Voltammetric Methods, Wiley, Chichester, 1987. Svehla, G., Automatic Potentiometrie Titrations, Pergamon, Oxford, 1977. 

A first-derivative plot of a potentiometrie titration curve. 

Typical potentiometrie titration data for the latices and also for the PAA solutions are shown in Figure 3 in the form of a plot of effective pK (15) against degree of ionisation (a1). 

Figure 1.10. Potentiometrie titration plot of a weak triprotic acid (after Segel, 1976, with permission).

The EDTA analog, N,N,N ,N -tetrakis(2-pyridylmethyl)ethylenediamine (TPEN), forms stable complexes with lanthanides Ln(TPEN) as shown in the work [111]. The stability constant for Am complex of the similar composition was calculated from potentiometry titration in the work [33]. The [M(TPEN)] complex is the major and the [M(OH)] is the minor components from the... 

Octadentate anion DTPA forms stable complexes with Np in solution. In contrast to EDTA, the absorption band of [Np(DTPA)] with maximum at 983 nm is very broad and has low intensity. Based on the spectrophotometry stability constant logy5i=30.33 0.12 was calculated [47,74]. In the work [122], the similar value, logy5i=29.29 0.02, was obtained using the same technique. Ion exchange measurement yields the value logy5i=30.96 [53]. Potentiometry titration gives very similar value for Pu(lV), logy5i=29.49 0.10 [123]. 

Figure 20-3. Potentiometrie titration curve of chloride titrated with silver ion.

Alkylsilyl sulphates were determined180 by potentiometric and conductiometric titration in anhydrous alcohols, ketones, methyl cyanide or nitromethane. Titration curves were the same for all solvents. In potentiometry, titration with sodium, potassium or lithium methoxide gave curves with one step titration with quaternary ammonium compounds gave curves with two steps. In conductiometry, titration with quaternary ammonium compounds gave curves with no inflection, whereas titration with alkali metal methoxides gave curves with a sharp break at the end-point. 

Unstable crystals, mp 119-120. Turns brown and liquefies on standing. The decompn products are formic acid and N-hydroxyglycine. Dibasic acid, potentiometrie titration shows pH peak at 3.5 and 9.1. Soluble in water, methanol, ethanol, acetone, ether... 

Sulphide Water quality, water pollution Photometry, potentiometry, titration... 

We have performed a study of aeidie properties of boron (HI) and vanadium (V) oxo-compounds in molten Nal at 700"C (see Table 10.4.1). A eomparative study of strength of Lux bases OH", C03 , S04 was determined " " by potentiometrie titration using sodium pyrophosphate as acid. Two moles of the first base may be neutralized by 1 mole of P407 , while two other moles react with the acid in ratio 1 1. On the base of e.m.f. drop magnitude at the equivalence point, the bases have been arranged in sequence 0H>C03 >S04 of basicity decrease. The equilibrium constants were not estimated. "" " ... 

TABLE 2 Survey of Applications of Continuous Potentiometrie Titrations in the Context of Surface Complexation... 

W. Lynn Schertz and G. D. Christian, Anal. Chem., 44, 755 (1972). Study of effects of neutral inorganic salts on potentiometrie titration curves of weak bases in nonaqueous solvents. Weak bases used urea, caffeine, Tw-nitroaniline, iV-dimethylaniline, aniline and pyridine. Solvents acetone, methyl isobutyl ketone, 2-butanone. Solutes LiC104, Lil, Mg(C104)2. 

N. H. Furman, Anal. Chem., 26, 84 (1954). Potentiometrie Titrations. Methods and Applications. 

Millilitres of Silver Nitrate Solution FIQ. 1 lllustratlv Potentiometrie Titration Curvet... 

Based on the surface and interfacial stracture and an exploitation of potentiometrie titration, mieroeleetrophoretic mobility and maoroseopie adsorption data a modelling of the interfacial deposition process is able to provide an integrated picture of the interfacial chemistry for the deposition process [1,4]. The observed band wavenumbers and stmctural properties for the species deposited on the pastes conform to the previewed [4] respective speciation an exploitation of normalised Raman intensities of the main representative bands due to the duee speeies partieipating in the speciation is also in full conformity with the model prediction [4]. 

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