Hanna Instruments HI 83200C User Manual

Page 11

Aluminum

ALUMINUM

SPECIFICATIONS

Range

0.00 to 1.00 mg/L

Resolution

0.01 mg/L

Accuracy

±0.02 mg/L ±4% of reading at 25 °C

Typical EMC

±0.01 mg/L

Deviation
Light Source

Tungsten lamp with narrow band interference filter @ 525 nm

Method

Adaptation of the aluminon method. The reaction between aluminum and reagents
causes a reddish tint in the sample.

REQUIRED REAGENTS

Code

Description

Quantity

HI 93712

A-0

Ascorbic acid

1 packet

HI 93712

B-0

Aluminon reagent

1 packet

HI 93712

C-0

Bleaching powder

1 packet

REAGENT SETS

HI 93712-01 Reagents for 100 tests
HI 93712-03 Reagents for 300 tests
For other accessories see page 128.

MEASUREMENT PROCEDURE

• Select the

Aluminum method using the procedure described in

the

Method Selection section (see page 12).

• Fill a graduated beaker with 50 mL of sample.

• Add the content of one packet of HI 93712A-0 Ascorbic acid

and mix until completely dissolved.

• Add the content of one packet of HI 93712B-0 Aluminon

reagent and mix until completely dissolved. This is the sample.

• Fill two cuvettes with 10 mL of sample each (up to the mark).

• If the solution contains some turbidity or color, add a powder packet of active carbon and follow the

procedure described in previous section

Colored or Turbid Samples.

• Calculate the dilution factor N:

N = 100/V
Where:
V is the volume of original sample poured in the cylinder, expressed in mL, and 100 is the final volume
in the cylinder, expressed in mL.

• When performing the reading, pay attention to multiply the read value by the dilution factor in order

to obtain the real concentration of the analyte in the original sample:
Example:
Reading = value A
Dilution factor = N
Real value in the original sample = A x N

Note: The methods Potassium Medium Range and Potassium High Range require a dilution of 1:5

(N = 5, V = 20 mL) and 1:10 (N = 10, V = 10 mL) of the sample. As the dilution is always
done, it is already included in the final result and is not necessary to multiply by the dilution factor.

10 mL

# 1

10 mL

# 2