LaMotte CHROMIUM TEST KIT LSCV - Manual (Page 2)

USE OF THE OCTET 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 DURES
HEXAVALENT CHROMIUM
1.
Fill test tube (0230) to 5 mL line with sample water.
2. Use the 0.05 g spoon (0696) to add one level measure of *Chromium
Reagent Powder (V-6276). Cap and shake for one minute. Wait five
minutes.
3. Insert test tube into the Chromium Comparator (7679). Match
sample color to a color standard. Record as ppm Hexavalent
Chromium (Cr
+6 ).
L Mott