Can anybody recommend an instrument or kit using with I can measure free calcium concentration at micromolar levels?

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Naima Rihane

Hi Aakash,

you can measure the calcium concentration by atomic absorption spectrophotometryor by ICP

Best wishes,

Naima

Mohammad I Al-Wabel

look for DPASV for free ions

Erik Meers

A membrane filtration step with the right will separate free ion from the complexed form. If such infrastructure is available to you, it might be the most accurate way of making the distinction.

Luis Bertello

See Naima answer. Use a standard with edta included.