Hanna-instruments HI 83208-2008 Manual de usuario descargar pdf (Pagina 35)

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Zinc

ZINC

SPECIFICATIONS

Range 0.00 to 3.00 mg/L

Resolution 0.01 mg/L

Accuracy ±0.03 mg/L ±3% of reading

Typical EMC ±0.01 mg/L

Deviation

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

Method Adaptation of the

Standard Methods for the Examination of Water and Wastewater,

edition,

Zincon method. The reaction between zinc and the reagents causes an

orange to a dark violet tint in the sample.

REQUIRED REAGENT

Code Description Quantity

HI 93731A-0 Zinc Reagent 1 packet

HI 93731B-0 Cyclohexanone 0.5 mL

REAGENT SETS

HI 93731-01 Reagents for 100 tests

HI 93731-03 Reagents for 300 tests

For other accessories see page 73.

MEASUREMENT PROCEDURE

• Select the

Zinc

method using the procedure described in the

Method Selection

section (see page 12).

• Fill one graduated mixing cylinder up to the 20 mL mark with

the sample.

• Add the content of one packet of HI 93731A-0 zinc reagent, close

the cylinder and invert several times to mix until completely

dissolved.

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

20 mL

10 mL

Silver

• 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 displays

the results in mg/L of silver.

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 completely

dissolved.

INTERFERENCES

Interference may be caused by:

above 30 mg/L Fe

above 1.5 mg/L

above 1000 mg/L as CaCO

above 10 mg/L

above 20 mg/L K

above 500 mg/L

above 8000 mg/L Mn

above 25 mg/L

above 1.5 mg/L Mg

above 1000 mg/L as CaCO

above 20 mg/L Na

above 5000 mg/L

above 40 mg/L Ni

above 1.5 mg/L

above 15 mg/L Pb

above 20 mg/L

above 20 mg/L Zn

above 30 mg/L

10 mL

# 2

1 2 ... 30 31 32 33 34 35 36 37 38 39

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