LaMotte SMART3 Colorimeter - Manual (Page 212)

PROCEDURE
1. Use the 10 mL graduated cylinder (0416) to measure 10 mL of sample water.
Pour into glass test tube (0608).
2. Use the 1 mL pipet (0354) to add 1 mL of *Hydrochloric Acid, 2.5N (6251).
3. Use the 0.1 g spoon (0699) to add 2 measures of *Ammonium Persulfate
Reagent (6566). Add two drops of *Silver Nitrate Solution, 0.0141N (6346WT).
Mix until the powder has dissolved. The solution will be slightly cloudy at this
point.
4. Use 10 mL graduated cylinder (0416) to add 5 mL of Sodium Citrate, 10%
(6253).
5. Use a second 1 mL pipet (0354) to add 1 mL of *Ammonium Hydroxide, Conc.
(6537). Mix, then dilute to 25 mL with deionized water.
6. Use a third 1 mL pipet (0354) to add 1 mL of *Dimethylglyoxime, 1% (6254).
Mix. Wait 20 minutes for color development.
7. At end of 20 minute waiting period fi ll a clean tube (0290) to the 10 mL line with
the developed test sample.
8. Fill a second clean tube (0290) to 10 mL line with deionized water or untreated
sample water. This is the blank.
9. Press and hold until colorimeter turns on.
10. Press ENTER to select TESTING MENU.
11. Select ALL TESTS (or another sequence containing 063 Nickel) from
TESTING MENU.
12. Scroll to and select 063 Nickel from menu.
13. Insert the blank into chamber, close lid and select SCAN BLANK.
14. Insert test sample into chamber, close lid and select SCAN SAMPLE. Record
result.
15. Press to turn colorimeter off or press
EXIT
to exit to a previous menu or
make another menu selection.
NOTE: It is strongly suggested that a reagent blank 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.
NICKEL SMART3 Test Procedures 11.10
Test P
rocedures