Test Procedures
PROCEDURE–FREE CHLORINE
Use universal sample holder.
1. Press
ON
button to turn spectrophotometer on.
2. Scroll to and select
PROGRAMMED TESTS
.
3. Scroll to and select
ALL TESTS
(or another sequence containing
15 Chlorine
) from
TESTING MENU
.
4. Scroll to and select
15 Chlorine
from menu.
5. Rinse a clean tube (0290) with sample water. Fill to the 10 mL line with sample.
6. Insert tube into chamber, close lid and select
SCAN BLANK
.
7.
Remove tube from Spectro. Add one Chlorine DPD #1 Instrument Grade Tablet
(69003A). Cap tube and shake for 10 seconds. Invert slowly 5 times. Solution will turn
pink if free chlorine is present.
8. Insert tube into chamber, close lid and select
SCAN SAMPLE
.
PROCEDURE–COMBINED CHLORINE
Use universal sample holder.
9. Add one Chlorine DPD #3 Instrument Grade Tablet (6197A) to sample from Step 8
above. Cap tube and shake for 10 seconds. Invert slowly 5 times. An increase in color
represents combined chlorine.
NOTE: For wastewater samples, Standard Methods for the Examination of Water and
Wastewater recommends waiting 2 minutes for full color development.
10. Insert sample into chamber, close lid and select
SCAN SAMPLE
. Record result as Total
Chlorine.
11. Subtract free chlorine reading from total chlorine reading to obtain concentration of
combined chlorine.
12. Press and hold the
OFF
button to turn off the spectrophotometer or press the
EXIT
button to exit to a previous menu or make another menu selection.
SMART Spectro 2 Test Procedures 05.02.16
CHLORINE,
DPD TABLET
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