pH 8.0짜리 0.5 M EDTA 용액 1 L 만들기

pH 8.0짜리 0.5 M EDTA 용액 1 L 만들기

 

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▶ EDTA (ethylenediamenetetraacetic acid)

 

 

1) Add 186.1 g of disodium EDTA•2H2O to 800 mL of distilled water.

 

2) Stir the solution vigorously using a magnetic stirrer.

 

3) Add NaOH solution to adjust the pH to 8.0. If you use solid NaOH pellets, you'll need 18~20 g of NaOH. Add the last of the NaOH slowly so that you don't overshoot the pH. You may wish to switch from solid NaOH to a solution toward the end for more precise control. The EDTA will slowly go into solution as the pH nears 8.0.

 

4) Dilute the solution to 1 L with distilled water.