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(analytical chemistry)
Measure of the clarity of an otherwise clear liquid by using colorimetric scales.
Cloudy or hazy appearance in a naturally clear liquid caused by a suspension of colloidal liquid droplets or fine solids.
The formation of disks centered on stars in long-exposure photographs as a result of light scattering by grains in the emulsion.
Any condition of the atmosphere which reduces its transparency to radiation, especially to visible radiation.



the capacity of an optically nonuniform medium to scatter light passing through it (see). The extinction coefficient is a quantitative characterization of turbidity and is given by the equation.

τ ═ (l/I) ln (I0/I)

where I0 and I are the intensities of a light beam before and after passage through a layer of the medium of thickness l. Turbidity is determined by methods of nephelometry and turbidimetry.

References in periodicals archive ?
As expected, the association between turbidity and AGI was found in cities with relatively high turbidity levels, often in unfiltered drinking water supplies," De Roos noted.
2007) and multiple new studies on the topic, we conducted a review to synthesize the evidence for an association between drinking-water turbidity and AGI incidence.
However, urban activist Atef Amin told Daily News Egypt that this turbidity is due to water pollution and denying this fact is considered a disregard of people's intelligence.
High levels of turbidity in oxbow lakes can occur due to excessive soil erosion from increased rainfall or high river levels (Obolewski 2011; Cullum et al.
This tributary and others periodically flood and supply suspended sediment to the Colorado River creating periods of high turbidity.
These results showed that the removal of turbidity by the combination of the coagulants was more efficient than the removal with [Al.
Cost of devices must drop significantly to make turbidity measurements more accessible to society.
Chemical coagulation is one of the mainly utilized tools designed for reduction of COD, color, suspended solids and turbidity [13, 14].
2008) had studied the use of aluminum sulfate, ferric chloride and poly aluminum chloride in turbidity removal from drinking water.
Turbidity is the one of the most important indicator for water clarity to be carried out in this experimental programme.