ORBECO SP600, Instruction Manual, Page: 134 / 334

132 SP600 Spectrophotometer 01/2008
1.1 Methods
Hydrazine
with Powder Reagent
0.05 – 0.5 mg/l N
2
H
4
/ 50 – 500 μg/l N
2
H
4
1. Fill a clean vial (24 mm Ø) with
10 ml of the water sample
(Note 1, 2), 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.
5. Add
1 g HYDRAZINE test powder
(Note 3) to the
water sample.
6. Close the vial tightly with the cap and swirl several
times to mix the contents.
7. Press [ ] key.
Wait for a
reaction period of 10 minutes.
After reaction period is finished proceed as follows:
8. Any slight turbidity that occurs when the reagent is added
must be removed by filtration (Note 4).
9. Place the vial in the sample chamber making sure that
the marks are aligned.
10. Press TEST key.
The result is shown in the display as Hydrazine.
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
Countdown
10:00
start:
2 0 5