Fig.7 Absorption changes of TPPS
4
depending
on pH: curves 1,2 - pH =1.1 (in 0.1 N HCl), curve 3 - pH =-1(in 40% H
2
SO
4
aqueous solution). TPPS
4
concentration: curve 1- × 10
-5
M, curves 2,3 - 5× 10
-6
M, optical path length - 10 mm.
