ORBECO SP600, Instruction Manual, Page: 154 / 334

152 SP600 Spectrophotometer 01/2008
1.1 Methods
Iron, total (TPTZ, Note 1)
with Powder Pack
0.1 – 1.8 mg/l Fe
Use two clean vials (24 mm Ø) and mark one as blank for
zeroing.
1. Fill a clean vial with 10 ml deionized water (this is the
blank).
2. Fill the second clean vial with 10 ml of water sample
(this is the sample).
3. Add
one Vario IRON TPTZ F10 powder pack
straight
from the foil into each vial.
4. Close the vials tightly and swirl several times to mix the
contents.
5. Press [ ] key.
Wait for a reaction
period of 3 minutes.
After reaction period is finished proceed as follows:
6. Place the vial (the blank) in the sample chamber making
sure that the marks are aligned.
7. Press ZERO key.
8. Remove the vial from the sample chamber.
9. Place the vial (the sample) in the sample chamber ma-
king sure that the marks are aligned.
10. Press TEST key.
The result is shown in the display in mg/l Iron.
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
Countdown
3:00
start:
1 2
3 4
2 2 3