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Universal buffer solutions

Avdeef, A., Budier,).). Accurate measurements of the concentration of hydrogen ions with a glass electrode calibrations using the Prideaux and other universal buffer solutions and a... [Pg.80]

A known quantity of sample is added to a known volume of a universal buffer solution of sufficient capacity and of known pH. The amount of sample must be sufficient to cause precipitation to occur in the formed saturated solution. After waiting for a period of time to allow the saturated solution to reach the desired steady state, the solution is filtered to remove the solid and obtain a clear solution, whose spectrum is then taken by the UV spectrophotometer. Mathematical treatment of the spectral data yields the area-under-the-curve of the filtered sample solution, AUQ. [Pg.107]

A 10 mM ionic strength universal buffer mixture, consisting of Good zwitterio-nic buffers, [174] and other components (but free of phosphate and boric acid), is used in the pION apparatus [116,556], The 5-pKa mixture produces a linear response to the addition of base titrant in the pH 3-10 interval, as indicated in Fig. 7.53. The robotic system uses the universal buffer solution for all applications, automatically adjusting the pH with the addition of a standardized KOH solution. The robotic system uses a built-in titrator to standardize the pH mapping operation. [Pg.231]

Table 9 Electronic absorption spectra of 83a, 83c, and 84a in aqueous universal buffer solutions ... Table 9 Electronic absorption spectra of 83a, 83c, and 84a in aqueous universal buffer solutions ...
Allen RI, Box KJ, Comer J et al. (1998) Multiwavelength spec-trophotometric determination of acid dissociation constants of ionizable drugs. 17(4-5) 699-712 Avdeef A, Bucher JJ (1978) Accurate measurements of the concentration of hydrogen ions with a glass electrode calibrations using the Prideaux and other universal buffer solutions and a computer-controlled automatic titrator. Anal Chem 50 2137-2142... [Pg.405]

These alkaloids are extracted from animal tissues with the universal buffer solution or with acid solution at pH 4 to 5 (using oxalic or tartaric acid). The alkaloids are then identified micro crystallographically by reaction with Rieneck s salt and by Vitali s reaction (57). [Pg.186]

H. T. S. Britton and R. A. Robinson have introduced several new universal buffer solutions. The following solutions are prepared by addition of 0.2 N sodium hydroxide to a solution which is 0.04 molar with respect to phosphoric, acetic, and boric acids. [Pg.262]

Figure 2. Fluorescence ratio, rp, as a function of a for copolymers in universal buffer solutions containing 0.1 M TMACl (first symbol in parentheses) or 0.1 M LiCl (second symbol in parentheses) (O > ) ethyl ( , ) butyl (X. B) pentyl (A, ) hexyl, high M.W. (V, T ) hexyl, low M.W. (O. ) octyl copolymer. From Reference 4. Figure 2. Fluorescence ratio, rp, as a function of a for copolymers in universal buffer solutions containing 0.1 M TMACl (first symbol in parentheses) or 0.1 M LiCl (second symbol in parentheses) (O > ) ethyl ( , ) butyl (X. B) pentyl (A, ) hexyl, high M.W. (V, T ) hexyl, low M.W. (O. ) octyl copolymer. From Reference 4.
Fig. 4 (a) SEM and (b) TEM images of L2-eRuO of 5 % wt. RUCI3 comparison of pH response between a glass pH electrode and an L2"CRuO toward (c) pH values and (d) calibration curve of NaOH and HCl titration in universal buffer solution [20] (Reprinted from Microchimica Acta, 2012. 177(1-2) p. 211-219 with permission from Springer Science and Business Media)... [Pg.1687]

The pH sensitivity of such films was tested in universal buffer solutions prepared according to the Perrin and Dempsey prescription [17]. The main solutimi consisted of 0.1 M citric acid, 0.1 M KH2PO4, 0.1 M Na2B407, 0.1 M TRIS, and 0.1 M KCl. pH of the buffer solution was adjusted either with HCl or NaOH to cover the pH range from 2 to 10. [Pg.308]

The standard deviation of the potential of the PEDOT-SSA films, in comparison to a conventional Ag AgCl electrode, measured in the universal buffer solution of pH = 9 during 60 min, did not exceed 0.7 mV. In general, the reproducibility of readouts between three electrodes was better than 10 mV. [Pg.309]

Britton HTS, Robinson RA, (1931) Universal buffer solutions and the dissociation constant of veronal. J Chem Soc 1456-1462... [Pg.196]


See other pages where Universal buffer solutions is mentioned: [Pg.940]    [Pg.50]    [Pg.50]    [Pg.1209]    [Pg.212]    [Pg.861]    [Pg.50]    [Pg.50]    [Pg.424]    [Pg.309]   
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