Test Procedures
PROCEDURE
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
54 Lead
) from
TESTING MENU
.
4. Scroll to and select
54 Lead
from menu.
5. Rinse a tube (0290) with sample water. Fill to 10 mL with sample.
6. Insert the tube into chamber, close lid and select
SCAN BLANK
.
7.
Remove the tube from Spectro. Empty the tube. Use the Syringe (0807) to add 5mL of
sample to the tube.
8. Add 5 mL *Ammonium Chloride Buff er (4032) to fi ll the tube to the 10 mL line. Swirl to
mix.
9. Add 3 drops *Sodium Cyanide, 10% (6565). Swirl to mix.
10. Use the 0.5 mL pipet (0353) to add 0.5 mL PAR Indicator (4033). Swirl to mix.
11. Use the 0.5 mL pipet (0353) to add 0.5 mL Stabilizing Reagent (4022). Cap and
mix.
12. Insert tube into chamber, close lid and select
SCAN SAMPLE
. Record result in ppm as
Reading A.
13. Remove tube from Spectro. Add 3 drops *DDC Reagent (4034). Cap and mix.
14. Insert tube into chamber, close lid and select
SCAN SAMPLE
. Record result in ppm as
Reading B.
15. ppm Lead = Reading A–Reading B
16. Press and hold
OFF
button to turn the spectrophotometer off or press
EXIT
button to
exit to a previous menu or make another menu selection.
NOTE: For best possible results, a reagent blank should be determined to account for any
contribution to the test result by the reagent system. To determine the reagent blank,
follow the above test procedure to scan a distilled or deionized water blank. Then follow
the above procedure to perform the test on a distilled or deionized water sample. This test
result is the reagent blank. Subtract the reagent blank from all subsequent test results
of unknown samples. It is necessary to determine the reagent blank only when a new lot
number of reagents is obtained.
SMART Spectro 2 Test Procedures 05.02.16
LEAD
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