Agriculture Reference
In-Depth Information
Caring for a pH meter depends on the types of electrode in use. Modern pH
meters do not mind their electrodes drying out provided they have been
rinsed thoroughly in deionized water or potassium chloride. Remember
that a liquid of pH
¼
4 has 10,000 more hydrogen ions than a liquid of
pH
¼
8. Thus, a single drop of pH
¼
4 in a vial measuring 400 drops of
pH
8 really upsets measurements! Remember also that the calibration
solutions consist of chemical buffers that “try” to keep pH levels constant,
so contamination of your test vial with a buffer is really serious. pH meters
have got extensive use in the field of pharmaceutical, agricultural, wine,
and food industry such as manufacturing of soft drinks, butter, and yogurt.
¼
There are different types of pH meters like instant pH meter, digital pH
meter, electronic digital pH meter, and pH indicators. In instant pH meter
one can see the results instantly; the instrument also does not require any
calibration with buffer solutions. Digital pH meters are handy and accurate
for pH measuring of waste water, chemical, and food and for some
laboratory applications. pH indicators are widely used in various industrial
applications, and also they are technically designed to meet the industrial
requirements
(continued)
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