|
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| Product |
Absorption |
Emission |
| Fluorescent
Red |
550
nm |
588
nm |
| Fluorescent
Yellow / Green |
490
nm |
520
nm |
| Clear |
349
nm |
430
nm |
| Blue |
630
nm |
na |
|
Normally, the blue
products are for visual tracing only.
|
What PPB
means?
Most of our products contain fluorescent
dyes, which can be detected visually, or with the use of ultraviolet light or
fluorometer.
"PPB" refers to one part of active dye per billion parts of water.
Using a fluorometer, the active dye can often be detected at levels less than
one ppb. All data is presented as reference points only and should not be
regarded as a recommendation.
Users should make their own determination of appropriate dilution levels in any
specific situation, which will vary with the nature, condition, and use of the
water or liquid and the specific evaluation to be performed. |
|
How to calculate the
size of a body of water :
One gallon of water occupies .1337 cubic
feet. For a rectangular tank, multiply depth in feet times width times length
divided by the factor .1337 to establish the number of gallons. For more
complicated bodies of water, formulas can be found in scientific texts on water
utility management, hydrology etc.
For
stream tracing and pollution detection
Introduce tracers into the
water at the source or suspected source of pollution. Allow sufficient time as
calculated, to permit the dye tracer to reach the effluent or recipient
location. Take samples of water for analysis.
Dye
tablets
May be dropped or flushed
directly into drains, sewers or other points in the system. However, it may be
desirable to dissolve them in a small amount of water to form a calculated
concentration prior to use.
Special larger shapes
(cakes, cones, and donuts) have been designed to provide optimum dissolution
rates in larger systems. Donuts are frequently suspended from a line or string
into the body of water. Cakes and donuts are sealed in a handy water-soluble
film for ease of use.
Light stability
Blue has the highest degree
of light stability and red is recommended for yellow and green backgrounds such
as algae rich water. Fluorescent Red, Blue and Fluorescent Yellow/Green should
be used in water bearing heavy sediment loads or when passing through soil with
high day content.
Photo degradation takes
place in sunlight at different rates for different dyes. Red takes from
approximately five to seven days and yellow/green fades in two to three days.
Blue, on the other hand, breaks down in three to four weeks.
The color of all dyes will disappear if the
solution is mixed with chlorine. Add approximately 4 grams of 12% bleach to
every gram of product in solution.
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