LaMotte SMART Spectro Spectrophotometer - Manual (Page 185)

PREPARATION OF *TMK INDICATOR
NOTE: Prepare *TMK Indicator daily. Keep out of direct sunlight.
1. Fill test tube (0778) to the 10 mL line with *Propyl Alcohol (4863).
2. Add one *TMK Tablet (4862).
3. Use tablet crusher (0175) to completely crush tablet.
4. Cap and mix. Shake vigorously for 30 seconds.
PROCEDURE
Use universal sample holder.
1. Press and hold ON button until spectrophotometer turns on.
2. Scroll and select PROGRAMMED TESTS.
3. Scroll and select ALL TESTS (or another sequence containing
57 Mercury) from TESTING MENU.
4. Scroll to and select 57 Mercury 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 spectrophotometer.
8. Use the 1.0 mL pipet (0354) to add 3 mL of *Acetate Buffer (4864). Cap and
mix.
9. Use the 0.5 mL pipet (0353) to add 0.5 mL of prepared *TMK Indicator. Cap
and mix.
10. Wait one minute.
11. Insert tube into chamber, close lid and select SCAN SAMPLE. Record result
as ppm Mercury.
12. Press OFF button to turn the spectrphotometer 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 using distilled or deionized water.
This test result is the reagent blank. Subtract the reagent blank results from all
subsequent test results of unknown samples. It is recommended that a reagent
blank be determined each time *TMK Indicator is prepared.
MERCURY SMART Spectro Test Procedures 2.11
Test P
rocedures