The exact results are obtained when the anion degree of polyacrylamide is bigger than 30% by the titration of cetyl pyridine bromide.
当采用溴代十六烷基吡啶滴定法时，只有在阴离子度大于30%时才可以准确测出样品的阴离子度。
2
In this paper the condition and composition of the ternary complex for determination of cadmium with Cd-methyl thymol blue-cetyl trimethyl ammonium bromide have been put forward.