Thermo Scientific AQUAfast AQ3700, User Manual

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Thermo Scientific Orion AQUAfast AQ3700 Colorimeter User Guide
1.1 Methods
Colour, true and apparent
(APHA Platinum-Cobalt
Standard Method)
0 – 500 Pt-Co units (mg/l Pt)
Sample preparation (Note 4):
Step A
Filter approx. 50 ml deionized water through
a membrane filter with a pore width of 0.45 μm.
Discard the filtrate. Filter another
50 ml deionized
water and keep it for zeroing. 16 mm Ø vials.
Step B
Filter approx. 50 ml of water sample using the same
filter. Keep this filter for sample measurement.
1. Fill a clean vial (24 mm Ø) with
10 ml
of the filtered deionized water (from Step A),
close tightly with the cap.
2. Place the vial in the sample chamber making sure that
the marks are aligned.
3. Press ZERO key.
4. Remove the vial from the sample chamber and empty
it completely.
5. Rinse the vial with the filtered water sample and
fill with 10 ml filtered water sample (from Step B).
6. Place the vial in the sample chamber making sure that
the marks are aligned.
7. Press
TEST
key.
The result is shown in the display in
Pt-Co units (mg/l Pt).
Zero accepted
prepare Test
press TEST
prepare Zero
press ZERO
4 0 2