English to Portuguese Tech/Engineering Chemistry; Chem Sci/Eng Standard Test Method

Add 0.1 M KOH solution in increments and mix to disperse the KOH as necessary (see Note 12).
Shake vigorously near the end point, but avoid dissolving carbon dioxide (CO2) in the solvent.
(In the case of acidic oils, the orange color changes to a green or green-brown as the end point is approached.)
When the solution first turns green or green-brown, reduce the increment size to dropwise (manual buret) or between 0.01 mL and 0.05 mL (automated buret).
Continue until a persistent green or green-brown end point is reached (see Note 13) and held for a minimum of 15 s after the addition of the last increment or if it reverses with two drops of 0.1 M HCl.