Turbidimetry

Turbidimetry (the name being derived from turbidity) is the process of measuring the loss of intensity of transmitted light due to the scattering effect of particles suspended in it. Light is passed through a filter creating a light of known wavelength which is then passed through a cuvette containing a solution. A photoelectric cell collects the light which passes through the cuvette. A measurement is then given for the amount of absorbed light.[1]

Turbidimetry can be used in biology to find the number of cells in a solution.[2]

Immunoturbidimetry

Immunoturbidimetry is an important tool in the broad diagnostic field of clinical chemistry. It is used to determine serum proteins not detectable with classical clinical chemistry methods. Immunoturbidimetry uses the classical antigen-antibody reaction. The antigen-antibody complexes aggregate to form particles that can be optically detected by a photometer.

gollark: Well, I do care about that, because having a worse economy means people's quality of life is generally worse.
gollark: I do think it would be good for cities to be split out into somewhat smaller cities with better land prices/traffic/etc, though.
gollark: Entirely anecdotally, I live in [RURAL AREA REDACTED] and don't like it because there is *nothing to do here*. Generally speaking, cities being less city-y would probably reduce productivity a lot which would be bad.
gollark: Hmm, so we need better treatments for age-related mental issues, you mean.
gollark: I mean, if you end up in horrible health in the later bits, yes, but otherwise it seems pretty great.

See also

References
  1. Mary C. Haven; Gregory A. Tetrault; Jerald R. Schenken (1994). Laboratory Instrumentation. John Wiley and Sons. ISBN 0471285722.
  2. D. M. Vasudevan; DM Vasudevan; S Sreekumari; Vaidyanathan Kannan (2010). Textbook of Biochemistry for Medical Students (6th ed.). Jaypee Medical Publishers. ISBN 978-9350250167.
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