Hanna-instruments HI 83214 Manuale Utente Scaricare il pdf (Pagina 20)

SPECIFICATIONS

Range 0.00 to 3.00 mg/L (as NH

-N)

Resolution 0.01 mg/L

Accuracy ±0.10 mg/L or ±5 % of reading @ 25 °C, whichever is greater

Light Source Tungsten lamp with narrow band interference filter @ 420 nm

Method Adaptation of the

ASTM Manual of Water and Environmental Technology, D1426-92

Nessler method. The reaction between ammonia and reagents causes a yellow tint in

the sample.

REQUIRED REAGENTS

Code Description Q.ty/test Q.ty/set

HI 93764A-0* Reagent Vial 1 vial 25 vials

HI 93764-0 Nessler Reagent 4 drops 1 bottle

Reagent Vial identification

: A LR, white label.

Note: Store the unused vials in a cool and dark place.

REAGENT SET

HI 93764A-25 Reagents for 25 tests

For other accessories see page 68.

MEASUREMENT PROCEDURE

• Select the

Ammonia LR

method following one of the procedures described in the “Method Selection”

section (see page 15).

Ammonia LR

AMMONIA LOW RANGE

• 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. This is the blank.

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

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Hanna-instruments HI 83214 Manuale Utente Pagina 20