Editing Assay (section)

===Detection method or technology===
Depending on the nature of the Detection system assays can be based on:
#'''Colony forming''' or [[virtual colony count]]: e.g. by multiplying bacteria or proliferating cells.
#'''[[Photometry (optics)|Photometry]]''' / '''[[spectrophotometry]]''' When the absorbance of a specific wavelength of light while passing through a fixed path-length through a cuvette of liquid test sample is measured and the absorbance is compared with a blank and standards with graded amounts of the target compound. If the emitted light is of a specific visible wavelength it may be called '''[[colorimetry]]''', or it may involve specific wavelength of light e.g. by use of [[laser]] and emission of [[fluorescent]] signals of another specific wavelength which is detected via very specific wavelength optical filters.
#'''[[Transmittance]]''' of light may be used to measure e.g. clearing of opacity of a liquid created by suspended particles due to decrease in number of clumps during a platelet [[Agglutination (biology)|agglutination]] reaction.
#'''[[Turbidimetry]]''' when the opacity of straight-transmitted light passing through a liquid sample is measured by detectors placed straight across the light source.
#'''[[Nephelometry]]''' where a measurement of the amount of light scattering that occurs when a beam of light is passed through the solution is used to determine size and/or concentration and/or size distribution of particles in the sample.<ref>{{cite web |url= http://medical-dictionary.thefreedictionary.com/nephelometry|title=Nephelometry |date=2016 |website=The Free Dictionary |publisher=Farlex |access-date=9 September 2016 }}</ref>
#'''[[Reflectometry]]''' When color of light reflected from a (usually dry) sample or reactant is assessed e.g. the automated readings of the strip urine dipstick assays.
#Viscoelastic measurements e.g. viscometry, elastography (e.g. [[thromboelastography]])
#Counting assays: e.g. optic [[Flow cytometry|Flow cytometric]] cell or particle counters, or [[Coulter principle|coulter]]/impedance principle based cell counters
#Imaging assays, that involve image analysis manually or by software:
##'''[[Cytometry]]''': When the size statistics of cells is assessed by an image processor.
#Electric detection e.g. involving [[amperometry]], [[Voltammetry]], [[coulometry]] may be used directly or indirectly for many types of quantitative measurements.
#Other physical property based assays may use
##[[Osmometer]]
##[[Viscometer]]
##[[Ion Selective electrode]]s
##[[Syndromic testing]]