Lamotte SMART3 Colorimeter User Manual download pdf (Page 165)

PROCEDURE

1. Press and hold until colorimeter turns on.

2. Press

ENTER

to selct TESTING MENU.

3. Select ALL TESTS (or another sequence containing 034 Cyanide) from

TESTING MENU.

4. Scroll to and select 034 Cyanide from menu.

5. Rinse a clean tube (0290) with sample water. Fill to the 10 mL line with sample.

6. Dip the end of plastic rod (0519) into water sample and touch it to a small piece

(1/4 inch) of pH test paper (2955) to wet paper. Read pH immediately from color

chart.

a) If pH is below 10, raise the pH by adding *Sodium Hydroxide, 1N (4004) one

drop at a time with stirring. Check pH after each drop with a new piece of pH

test paper. Continue adjustment until pH is between 10.5 and 11.0.

b) If pH is above 11.5, lower pH by adding *Hydrochloric Acid (6130) one drop

at a time with stirring. Check pH after each drop with a new piece of pH test

paper. Continue adjustment until pH is between 10.5 and 11.0.

7. Insert tube into chamber, close lid and select SCAN BLANK.

8. Remove tube from colorimeter. Use the 1.0 mL pipet (0354) to add 1.0 mL of

Cyanide Buffer (2850PS) to tube. Cap and mix.

9. Use one 0.1 g spoon (0699) to add one level measure of *Cyanide Cl Reagent

(2794DS). Cap and invert 10 times to mix. Wait 30 seconds.

10. During the 30 second waiting period, carefully ﬁ ll a second 0.1 g spoon (0699)

with one level measure of *Cyanide Indicator Reagent (2793DS).

11. At the end of the 30 second waiting period, immediately add the level measure

of *Cyanide Indicator Reagent (2793DS). Cap and shake vigorously for 20

seconds. Wait 20 minutes for maximum color development.

12. At the end of the twenty minute waiting period, mix, insert tube into chamber,

close lid and select SCAN SAMPLE. Record result.

13. Press

to turn colorimeter off or press

EXIT

to exit to a previous menu or

make another menu selection.

SMART3 Test Procedures 2.11 CYANIDE

Test Procedures

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Lamotte SMART3 Colorimeter User Manual Page 165