Hanna-instruments HI 83099 Manual do Utilizador descarregar pdf (Página 38)

7574

Manganese LR

MANGANESE LOW RANGE

SPECIFICATIONS

Range 0 to 300 µg/L

Resolution 1 µg/L

Accuracy ±10 µ/L ±3% of reading at 25 °C

Typical EMC ±1 µg/L

Deviation

Light Source Tungsten lamp with narrow band interference filter @ 575 nm

Method Adaptation of the PAN Method. The reaction between manganese and the reagents

causes an orange tint in the sample.

REQUIRED REAGENT

Code Description Quantity

HI 93748A-0 Ascorbic acid 2 packets

HI 93748B-0 Alkaline-cyanide sol. 0.40 mL

HI 93748C-0 0.1% PAN indicator 2 mL

HI 93703-51 Dispersing Agent 4-6 drops

REAGENT SETS

HI 93748-01 Reagents for 50 tests

HI 93748-03 Reagents for 150 tests

For other accessories see page 132.

MEASUREMENT PROCEDURE

• Select the

Manganese LR

method using the procedure described in the

Method Selection

section (see

page 12).

• Fill one cuvette with 10 mL of deionized water (up to the mark).

• Fill a second cuvette with 10 mL of sample (up to the mark).

• Add the content of one packet of HI 93748A-0 Ascorbic acid to

each cuvette, replace the caps and shake gently until completely

dissolved.

10 mL

Manganese HR

• Add the content of one packet of HI 93709B-0 Sodium

Periodate reagent. Replace the cap and invert to mix with

gently movements for 2 minutes.

• Reinsert the cuvette into the instrument.

• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait

for 1 minute and 30 seconds and press Read. When the timer ends the meter will perform the reading.

The instrument displays the results in mg/L of manganese.

• Press s or t to access the second level functions.

• Press the Chem Frm key to convert the result in mg/L of potassium permanganate (KMnO

) and

permanganate (MnO

¯).

• Press s or t to return to the measurement screen.

INTERFERENCES

Interference may be caused by:

Calcium above 700 mg/L

Chloride above 70000 mg/L

Iron above 5 mg/L

Magnesium above 100000 mg/L.

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