LaMotte SULFIDE TEST KIT P-70 - 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.
EPA AC CEPTED PRO CE DURE
A known concentration of sulfide in the range of 0.2-20.0 ppm S
= may be
prepared as a check standard by referring to APHA Standard Methods
4500–S
2– D, 17th Ed., 1989. Run this test on the check standard. If the test
result is incorrect, discard the old reagents and order the reagent refill
package.
PRO CE DURE
1.
Fill test tube (0230) to line with sample water.
2. Add 15 drops of *Sulfide Reagent A (4458). Cap and gently invert to
mix.
3. Add 3 drops of *Sulfide Reagent B (4459). Cap and mix. Wait 1
minute.
4. Use the 1.0 mL pipet (0354) to add 1 mL of Sulfide Reagent C
(4460). Cap and mix.
5. Insert test tube into the Sulfide Comparator (4457). Match sample
color to a color standard. Record as ppm Sulfide (S
= ).
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800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax 410-778-6394
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