Hanna Instruments HI 83208-2008 User Manual

Page 35

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:
Al

above 30 mg/L

above 1.5 mg/L

above 1000 mg/L as CaCO

above 10 mg/L

above 20 mg/L

above 500 mg/L

above 8000 mg/L

above 25 mg/L

above 1.5 mg/L

above 1000 mg/L as CaCO

above 20 mg/L

above 5000 mg/L

above 40 mg/L

above 1.5 mg/L

above 15 mg/L

above 20 mg/L

above 30 mg/L

10 mL

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