... 95% and 5% at pH 6 and 15 and 85% at pH 4, respectively (pKa=4.75).Furthermore, even though the concentrat ion of theanion changes in this case as well, and is higher at pH6, this species is ... L3-,LH2-,LH2-,andLH3are 27%, 69%, 4%, and 0% at pH 6 while at pH 4 therelative concentrations for the same species are 0%,13%, 77%, and 10%. At low pH, the predominate speciesis LH2-whereas ... at pH 5turned white within 12 h; wherea s, those dialyzed at pH7 remained faintly blue even at the end of 48 h. Particleswere then collected from the dialysis tubing and analyzed further for...