How to prepare 0.1 M Sodium Citrate buffer (pH 9) , pH 6, pH 3???

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Alejandro Martin Popular answer

For pH 3, mix 49.81 mL of 1 M citric acid with 50.19 mL of 1 M monosodium citrate.

For pH 6, mix 17.45 mL of 1 M disodium citrate with 82.55 mL of 1 M trisodium citrate.

For pH 9, mix 0.01 mL of 1 M disodium citrate with 99.99 mL of 1 M trisodium citrate.

The buffer capacity of the last one(pH 9) will be very poor, though.

Alejandro Martin

Uyen Nguyen

then how to prepare 50mM Sodium Citrate buffer pH 6 ? many thanks