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21
Aluminum
ALUMINUM
SPECIFICATIONS
Range
0.00 to 1.00 mg/L
Resolution
0.01 mg/L
Accuracy
±0.02 mg/L ±4% of reading
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).
10 mL
10 mL
# 1
# 2
Note:
To measure exactly 5 mL of sample with the syringe, push the plunger completely into the syringe
and insert the tip into the sample. Pull the plunger out until the lower edge of the seal is on the 5
mL mark of the syringe.
• Remove the cap and fill the Demineralizer Bottle with tap water.
• Replace the cap and shake gently for at least 2 minutes.
• Open the upper part of the Demineralizer Bottle cap and squirt
gently the demineralized water into the cylinder, up to the 100 mL
mark.
• Pour the solution in the large 170mL beaker, replace the cap and
invert several times to mix.
• If the solution contains some turbidity or color, add a powder packet of active carbon and follow the
procedure described for
Irrigation Water (LR)
.
probable level of liquid
taken up by syringe
