LaMotte PHOSPHATE IN WATER TEST KIT NVM - 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 (0843) to line with sample water.
2. Use the 1 mL pipet (0354) to add 2 mL of *VM Phosphate Reagent
(4410). Cap and invert several times to mix. Wait 3 minutes.
3. Use the plain pipet (0352) to add 4 drops of *Reducing Reagent
(6405). Cap and mix. Color will develop within 10 seconds.
4. Remove stopper from test tube. Place tube in Phosphate Comparator
(7608) with Axial Reader (2071). Match sample color to a color
standard. Record as ppm Orthophosphate.
CAUTION:
Do not use soaps or de ter gents con tain ing phosphates
to wash the test tubes.
LaMOTTE COM PANY
Helping Peo ple Solve An a lyt i cal Challenges SM
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
05/07
L Mott