
82
SP600 Spectrophotometer 01/2008
1.1 Methods
Chromium, differentiated
determination with Powder Pack
0.005 – 0.5 mg/l Cr / 5 – 500 μg/l Cr
Digestion:
1. Fill
10 ml of water sample
into a clean vial (16 mm Ø).
2. Add
one PERSULF.RGT FOR CR powder pack
straight
from the foil into the vial.
3. Close the vial tightly with the cap and swirl several
times to mix the contents.
4. Heat the vial for
120 minutes
in a preheated thermo-
reactor at a temperature of
100°C
.
5. Remove the vial from the thermoreactor.
(
CAUTION: The vials are hot!).
Invert the vial and allow to cool to room temperature.
Performing test procedure:
6. Fill a clean 50 mm cell with
deionized water
.
7. Place the cell in the sample chamber making sure that
the positioning is correct.
8. Press
ZERO
key.
9. Remove the cell from the sample chamber. Empty the
cell and dry completely.
10. Add
one CHROMIUM HEXAVALENT powder pack
straight from the foil into the pre prepared vial (see
step 5).
11. Close the vial tightly with the cap and swirl several
times to mix the contents.
12. Fill the 50 mm cell with this test solution.
13. Place the cell in the sample chamber making sure that
the positioning is correct.
14. Press
TEST
key.
Wait for a
reaction period of 5 minutes
.
After the reaction period is finished the measurement
starts automatically.
Ø 16 mm
prepare Zero
press ZERO
Zero accepted
prepare T1
press TEST
Countdown
5:00
1
2
4
Содержание SP600
Страница 1: ...Instruction Manual SP600 Spectrophotometer ...
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Страница 73: ...71 SP600 Spectrophotometer 01 2008 1 1 Methods Notes 1 Oxidizing agents interfere as they react like Chlorine ...
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Страница 163: ...161 SP600 Spectrophotometer 01 2008 1 1 Methods Note 1 Mn MnO4 KMnO4 ...
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Страница 231: ...229 SP600 Spectrophotometer 01 2008 1 1 Methods Notes 1 Only ortho Phosphate ions react 2 P PO4 P2 O5 ...
Страница 245: ...243 SP600 Spectrophotometer 01 2008 1 1 Methods Note 1 If Sulfate ions are present a cloudy solution will be given ...
Страница 249: ...247 SP600 Spectrophotometer 01 2008 1 1 Methods Notes 1 SO3 Na2 SO3 ...
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