The interaction of cations with the dye arsenazo III.

@article{Rowatt1989TheIO,
  title={The interaction of cations with the dye arsenazo III.},
  author={E Rowatt and Robert J Williams},
  journal={The Biochemical journal},
  year={1989},
  volume={259 1},
  pages={295-8}
}
1. The dye arsenazo III combines with a selection of cations to give an altered absorption spectrum. 2. Large metal cations such as Ca2+, La3+ and quadrivalent cations give a 1:1 complex with two new absorption peaks at about 610 nm and 655 nm and a KD of about 10(-6) M. 3. Aliphatic polyamines and complex cobalt ions give a 1:1 complex, with one absorption peak at about 610 nm and a KD from 10(-6) to 10(-3) M. 4. Small metal cations finally form a 2:1 complex and also have one absorption peak… CONTINUE READING