Hanna-instruments HI 83214 Manual do Utilizador descarregar pdf (Página 52)

Phosphorus, Acid Hydrolyzable

• Remove the cap from a Reagent Vial.

• Add exactly 5.0 mL of sample to the vial, while keeping the vial at a

45-degree angle.

• Replace the cap and mix by inverting the vial a couple of times.

• Insert the vial into the reactor and heat it for 30 minutes at 150 °C.

• At the end of the digestion place the vials carefully in the test tube rack and

allow to cool to room temperature.

Warning: The vials are still hot, be careful when handling them.

• Select the

Phosphorus,

Acid Hydrolyzable

method following one of the procedures described in the

“Method Selection” section (see page 15).

• Remove the cap from the vial and add exactly 2.0 mL of

Sodium Hydroxide (NaOH) Solution 1.20 N, while keeping

the vial at a 45-degree angle.

• Replace the cap tightly and mix by inverting the vial a

couple of times. This is the blank.

• Place the vial into the holder and push it completely down.

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Hanna-instruments HI 83214 Manual do Utilizador Página 52