ORBECO SP600, Instruction Manual, Page: 67 / 334

65
SP600 Spectrophotometer 01/2008
1.1 Methods
Chlorine, total
with Liquid Reagent
0.02 – 3 mg/l Cl
2
1. Fill a clean vial (24 mm Ø) with
10 ml of the water sample
,
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
the vial .
5. Fill the vial with the same size drops by holding the
bottle vertically and squeeze slowly:
6 drops of DPD 1 buffer solution
2 drops of DPD 1 reagent solution
3 drops of DPD 3 solution
6. Add water sample to the 10 ml mark.
7. Close the vial tightly with the cap and swirl several
times to mix the contents.
8. Place the vial in the sample chamber making sure
that the marks are aligned.
9. Press
TEST
key.
Wait for a reaction period of 2 minutes .
After the reaction period is finished the measurement starts
automatically.
The result is shown in the display in mg/l
total Chlorine.
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
Countdown
2:00
1 0 1