Hach Eclox, Руководство пользователя

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reduces the amount of light that is created. The more pollutant that is in the
sample, the less light that is created. The light made by the sample water is
compared to a pure water reference and the percentage inhibition of the light
made is measured and made known.
• Arsenic Test— measures the arsenic content of the water sample. Arsenic is a
common poison and industrial pollutant. Arsenic is also in chemical warfare (CW)
agents, such as Lewisite. The result of this test can be read in mg/L from a
comparison chart.
• Pesticide/Nerve Agent Test —gives a YES/NO answer if pesticide/nerve agents
are in the water sample.
• Chlorine Test —measures how much free chlorine is in the water sample and
gives the results in mg/L. Systems using monochloramines may choose to
monitor total chlorine.
Chlorine is frequently used to disinfect water for human consumption. The
quantity of chlorine used must be carefully controlled and the free residual
concentration of the chlorine in the water gives a useful means of monitoring the
effectiveness of the water treatment done. Chlorinated water can, however, cause
damage to the Reverse Osmosis (RO) filter of water purification equipment and
should not be used as a source water in a RO type of process.
• Color Test —a comparison test that compares the water sample with a calibrated
gradient color disc. The results are read in platinum cobalt (Pt-Co) color units.
Color in water may be caused by the presence of natural metallic ions (iron and
manganese), peat materials, plankton, weeds and industrial wastes.
• Total Dissolved Solids (TDS) Test —measures the level of dissolved solids in the
water sample. TDS and the conductivity of a sample are related. The TDS is
approximately 0.7 of the conductivity result (µS/cm
3
).
• pH Test —measures the pH level of the water sample.
• Luminescent Bacteria Toxicity Test (optional)— a biotest that measures the
toxicity of environmental samples. Toxicity is a biological or biochemical sum
parameter that cannot be measured by chemical analysis. Toxicity is a measure of
the effect of a sample on living organisms, biological systems and enzymes. Other
biotests such as fish, daphnia and algae tests are more complex and, because
other biotests use higher living organisms, are also controversial. In the practice
of environmental analysis, the Luminescent Bacteria Toxicity Test has shown to be
fast, simple, reliable and sensitive.
The Luminescent Bacteria Toxicity Test uses natural bacteria that make light.
Toxic samples decrease the amount of light the bacteria make. The more toxic the
sample, the less light the bacteria make. The amount of light that is made by the