Hanna-instruments HI 83208-2008 Manual de usuario descargar pdf (Pagina 25)

48 49

Nickel LR

• Press TIMER and the display will show a countdown prior to adding reagent C or, alternatively, wait

for 15 minutes. Add one packet of HI 93740C-0 EDTA reagent to each beaker, cap and swirl to mix

until completely dissolved.

• Fill one cuvette up to the mark with 10 mL of the blank.

• 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.

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

• Insert the second cuvette into the instrument.

• Press READ to start the reading. The instrument dis-

plays the results in mg/L of nickel.

Note: a temperature above 30°C may cause turbidity. In this case, before zeroing and taking readings,

add 2-3 drops of Dispersing Agent (HI 93703-51) to each cuvette and swirl until turbidity is removed.

10 mL

Nickel LR

NICKEL LOW RANGE

SPECIFICATIONS

Range 0.000 to 1.000 mg/L

Resolution 0.001 mg/L

Accuracy ±0.010 mg/L ±7% of reading

Typical EMC ±0.001 mg/L

Deviation

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

Method Adaptation of the PAN method. The reaction between nickel and the reagents causes

an orange tint in the sample.

REQUIRED REAGENTS

Code Description Quantity

HI 93740A-0 Phthalate-phosphate 2 packets

HI 93740B-0 0.3% PAN indicator 2 mL

HI 93740C-0 EDTA 2 packets

HI 93703-51 Dispersing Agent 4-6 drops (only when necessary, see note)

REAGENT SETS

HI 93740-01 Reagents for 50 tests

HI 93740-03 Reagents for 150 tests

For other accessories see page 73.

MEASUREMENT PROCEDURE

• Select the

Nickel LR

method using the procedure described in the

Method Selection

section (see page 12).

Note: for best results perform your tests between 20-24°C.

• Fill one graduated beaker with 25 mL of deionized water (blank) and

another one with 25 mL of sample.

• Add the content of one packet of HI 93740A-0 Phthalate-phosphate reagent

to each beaker. Cap and swirl gently until the reagent is dissolved.

Note: If sample contains iron (Fe

), it is important that all powder be

dissolved completely before continuing with following step.

• Add 1 mL of HI 93740B-0 0.3% PAN solution to each beaker, cap and swirl

to mix.

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Hanna-instruments HI 83208-2008 Manual de usuario Pagina 25

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