Figure 3 shows the thermometric titration curve for raw crude, and Figure 4 shows the corresponding potentiometric titration curve. Figure 3. Thermometric titration curve for raw crude. Figure 4.

Figure 2: Determination of the hydroxyl value (blue = titration curve, pink = ERC). Comments Use a 15 to 20 g sample for samples with an expected hydroxyl value of 2 or lower.

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The potentiometric titration behavior has been studied for the aqueous solutions of poly(N-vinylimidazole) (PVI) in the presence of various supporting electrolytes, NaCl, NaBr, NaNO3, NaI, NaSCN ...

Ion‐selective electrodes (ISEs) and potentiometric sensors form an essential class of analytical tools that determine the activity of specific ions in diverse matrices.