Hanna-instruments HI 83212 Manual de usuario descargar pdf (Pagina 17)

32 33 Molybdenum

MOLYBDENUM

SPECIFICATIONS

Range 0.0 to 40.0 mg/L

Resolution 0.1 mg/L

Accuracy ±0.3 mg/L ±5% of reading

Typical EMC ±0.1 mg/L

Deviation

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

Method Adaptation of the mercaptoacetic acid method. The reaction between molybdenum and

the reagents causes a yellow tint in the sample.

REQUIRED REAGENT

Code Description Quantity

HI 93730A-0 Reagent A 1 packet

HI 93730B-0 Reagent B 1 packet

HI 93730C-0 Reagent C 1 packet

REAGENT SETS

HI 93730-01 Reagents for 100 tests

HI 93730-03 Reagents for 300 tests

For other accessories see page 50.

MEASUREMENT PROCEDURE

• Select the

Molybdenum

method using the procedure

described in the

Method Selection

section (see page

12).

• Fill the cuvette with 10 mL of unreacted sample (up to

the mark) and replace the cap.

• Place the cuvette into the holder and close the lid.

• Press ZERO key. The display will show “-0.0-” when

the meter is zeroed and ready for measurement.

• Add 12 drops of the HI 93704-0 reagent to each

cuvette. Replace the caps and shake gently to mix.

• Place the blank (#1) into the holder and close the lid.

• Press TIMER and the display will show the countdown

prior to zeroing the blank. The display will show “-0.0-”

when the meter is zeroed and ready for measurement.

• Remove the blank.

• Insert the cuvette with the reacted sample (# 2) into the

instrument and close the lid.

• Press READ to start the reading. The instrument displays

concentration in µg/L of hydrazine.

Hydrazine

x 12

# 1

# 2

x 12

# 1

# 2

INTERFERENCES

Interference may be caused by:

Highly colored samples

Highly turbid samples

Aromatic amines

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 26 27

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