Turbidity:
It is the measure of inter frame
given by insoluble process of soil organics, mionoorganisms and other materials for the passage of light
through water the standard unit is
that which is produced by 1
milligram of finely divided silico in one litre of distilled water the
permissible limit of turbidity is 5 to 10units on silica scale.
The turbidity may be measured in the laboratory by following
instruments
i.
Turbidity
Rod
ii.
Jackson?s
Turbidity meter
iii.
Nephelo
Turbidity meter
iv.
Baylis
Turbidity meter
v.
Hellige
Turbidity meter
JACKSON'S TURBIDITY METER
It is the
std. instrument for measuring turbidity. It essentially consists of a
calibrated glass tube, a metallic container tube (or holder), a standard candle
and a metallic stand. The glass tube is placed in the container and the candle
or standard source of light is placed below the container. The water sample B
poured slowly in the glass tube until the outline of the candle flume is no
longer visible. Readings in terms of Jackson turbidity unit (JTU) are then
taken directly from the calibrated tube.
TASTE AND ODOUR
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