Lovibond Maxi Direct, Instruction Manual, Page: 116 / 268

114 MaxiDirect_2c 03/2010
1.1 Methods
Manganese LR
with Vario Powder Pack
0.01 – 0.7 mg/l Mn
Use two clean vials (24 mm Ø) and mark one as blank for
zeroing (Note 1).
1. Fill a clean vial with 10 ml of deionised water (this
is the blank).
2. Fill the second clean vial with 10 ml of the water
sample (this is the sample).
3. Add the contents of
one Vario Ascorbic Acid Powder
Pack
straight from the foil into each vial (Note 2).
4. Close the vials tightly with the caps and swirl several
times to mix the contents.
5. Fill each vial with drops of the same size by holding the
bottle vertically and squeeze slowly (Note 3):
15 drops of Alkaline Cyanide reagent solution
6. Close the vials tightly with the caps and swirl several
times to mix the contents.
7. Fill each vial with drops of the same size by holding the
bottle vertically and squeeze slowly:
21 drops of PAN Indicator solution
8. Close the vials tightly with the caps and swirl several
times to mix the contents.
9. Press [ ] key.
Wait for a
reaction period of 2 minutes
(Note 4).
After the reaction period is finished proceed as follows:
9. Place the vial (the blank) in the sample chamber making
sure that the marks are aligned.
10. Press ZERO key.
11. Remove the vial from the sample chamber.
12. Place the vial (the sample) in the sample chamber
making sure that the marks are aligned.
13. Press
TEST
key.
The result is shown in the display in mg/l Manganese.
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
Countdown 1
2:00
start:
1 2
3 4
4
2
2