LaMotte NICKEL TEST OUTFIT P-54 - 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 DURE
1.
Fill 10 mL graduated cylinder (0416) to 10 mL line with sample
water. Transfer to test tube (0608).
2. Use a 1 mL pipet (0354) to add 1 mL of *Hydrochloric Acid
(6251PS). Cap and mix.
3. Use the 0.1g spoon (0699) to add 2 measures of *Ammonium
Persulfate (6566). Add 2 drops of *Silver Nitrate, 0.0141N (6346).
Cap and mix until all of the Ammonium Persulfate has dissolved.
The solution will be slightly cloudy at this point.
4. Use the graduated cylinder to measure 5 mL of Sodium Citrate, 10%
(6253). Add to solution.
5. Use a second 1 mL pipet to add 1 mL of *Ammonium Hydroxide
(6537). Cap and mix. Dilute to 25 mL with Deionized Water (5115).
6. Use a third 1 mL pipet to add 1 mL of *Dimethylglyoxime (6254).
Cap and mix. Wait 20 minutes.
7. Fill a test tube (0230) to 5 mL line with treated sample. Insert test
tube into Nickel Comparator (7803). Match sample color to a color
standard. Record as ppm nickel.
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
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L Mott