Tintometer Lovibond MD100 Instrucciones página 60

Methods
GB
Hydr
0.0.0
Zero
Test
Hydr
RESULT
60
Hydrazine with Powder Reagent
50 – 500 μg/l N
2
Fill a clean vial (24 mm Ø) with 10 ml of the water sample (Note 1,
2) and perform zero calibration (see "Operation").
Add 1 g HYDRAZINE test powder (Note 3) to the water sample.
Close the vial tightly with the cap and invert several times to mix the
contents.
Wait for a reaction period of 10 minutes.
After the reaction period is finished proceed as follows:
The slight turbidity that occurs when the reagent is added must be
removed by filtration (Note 4).
Place the vial in the sample chamber making sure that the
are aligned.
Press the [ZERO/TEST] key.
The method symbol flashes for approx. 3 seconds.
The result is shown in the display in µg/l Hydrazine.
H
4
marks
MD100_2 10/2014