Hello! I'm going to use X-Rhod-1 to measure Ca2+, and I'm not sure about the effect of other cations in living cells. Is it necessary to use a selective chelator? I've read that heavy metal cations do not affect Ca2+ measurement in living cells, http://www.ncbi.nlm.nih.gov/pubmed/11032778 but this paper does not mention X-Rhod-1.

In case I should use a selective chelator, which one do you recommend?

Thank you

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