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Glossary
Checkfridge™
Hanna temperature monitor with magnetic
backing and remote thermistor sensor on a 1
meter cable.
Checktemp®
Hanna Electronic Digital Thermometer with
sharp-tip probe
CIS
Commonwealth of Independent States
Cleaning Solution
The solution used for cleaning the glass
bulb of the electrode/probe once a day or at
least once a week to maintain accuracy and
to prevent junction clogging.
Clip-Lock™
Interrupting an important cycle of analysis
due to a malfunctioning burette is a thing of
the past. With the Hanna Clip-Lock™ system
you can simply substitute the burette and
complete all your tests with the same titrant!
TheClip-Lock™exchangeableburette system
prevents cross contamination while reducing
loss of time and reagents. Burettes simply
slide out for quick exchanges, and detaching
the aspiration and dispensing tubes from the
titrant bottles is easy.
COD
Chemical Oxygen Demand is a measure of the
oxygen equivalent of the organic matter in
the sample that is susceptible to oxidation by
a strong oxidizing agent.
Colorimeter
(see Photometer)
Colorimetry
Colorimetry
is
concerned
with
the
determination of the concentration of a
substance by measurement of the relative
absorption of light with respect to a known
concentration of the substance. In visual
colorimetry, natural or artificial white light
is generally used as a light source, and
determinations are usually made with a
simple instrument termed a photometer, or
color comparator. When the eye is replaced by
a photoelectric cell (thus largely eliminating
the errors due to the personal characteristics
of each observer) the instrument is termed a
photoelectric colorimeter, or photometer.
Conditioning Solution
A specialized solution in which the electrode
must be immersed in to activate the glass
selective membrane.
CPS™
Clogging Prevention System. Conventional
pH electrodes use ceramic junctions that may
clog quickly when used in biological samples
such as wine. When the junction is blocked,
theentireelectrodewillnotfunctionproperly.
Electrodes that feature CPS™ technology
utilize a ground glass/PTFE sleeve junction
which controls a steady, predictable flow of
fill solution thus keeping the junction open.
The hydrophobic property of PTFE sleeve
repels wetness and coatings.
CYAC
Cyanuric Acid
°Dornic
Determined by titrating a 100 mL sample
withN/9sodiumhydroxidetoaphenolphthalein
end point.
Delrin
A plastic made from Acetal Homopolymer;
a crystalline plastic that offers an excellent
balance of properties that bridge the gap
between metals and plastics.
Detection Limit
In analytical chemistry, the detection limit
LOD of an individual analytical procedure is
the lowest amount of analyte in a sample
which can be detected but not necessarily
quantitated as an exact value; or the
lowest quantity of a substance that can
be distinguished from the absence of that
substance (a blank value) within a stated
confidence limit (generally 1%).
The detection limit is estimated from the
mean of the blank, the standard deviation of
theblankandsomeconfidencefactor.Another
consideration that affects the detection limit
is the accuracy of the model used to predict
concentration from the raw analytical signal.
There are a number of different “detection
17
Glossary
17.8
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