LaMotte CYANIDE IN WATER TEST KIT - Manual (Page 2)

USE OF THE OC TET COM PARA TOR
The Octet Comparator contains eight permanent
color standards. A test sample is inserted into
the openings in the top of the comparator. The
sample can then be compared to four color
standards at once, and the value read off the
comparator. For optimum color comparison, the
comparator should be positioned between the
operator and a light source, so that the light
enters through the special light-diffusing screen
in the back of the comparator. Avoid viewing
the comparator against direct sunlight or an
irregularly lighted background.
PRO CE DURE
1.
Fill test tube (0230) to 5 mL line with sample water.
2. Dip the end of the plastic rod (0519) into sample water. Touch to a
small piece of Test Paper (2955) to wet paper. Immediately read pH
from color chart.
If pH is below 10, add *Sodium Hydroxide, 1N (4004) one drop at
a time until pH is between 10.5 and 11.0. Check pH with a piece
of Test Paper (2955) after adding each drop.
If pH is above 11.5, lower pH by adding *Hydrochloric Acid, 1N
(6130) one drop at a time until pH is between 10.5 and 11.0.
Check pH with a piece of Test Paper (2955) after adding each drop.
3. Use the 0.5 mL pipet (0353) to add 0.5 mL of Cyanide Buffer
(2850PS). Cap and invert 10 times to mix. Wait 30 seconds.
4. Use a 0.05 g spoon (0696) to add one measure of *Cyanide Cl
Reagent (2794DS). Cap and invert 10 times to mix. Wait 30
seconds.
5. Use a second 0.05 g spoon to add one measure of *Cyanide
Indicator Reagent (2793DS). Cap and shake vigorously for 15-20
seconds. Wait 20 minutes. Solution will turn violet if cyanide is
present.
6. Insert test tube into Cyanide Comparator (4417). Match sample
color to a color standard. Record as ppm Cyanide.
LaMOTTE COM PANY
Helping Peo ple Solve An a lyt i cal Challenges
®
PO Box 329 • Chestertown • Mary land • 21620 • USA
800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax 410-778-6394
Visit us on the web at www.lamotte.com
01.10
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