From TheBestLinks.com
The word standard has several meanings:
Classically, standard referred to a flag or banner; especially, a national or other ensign carried into battle; thus "standard bearer" indicates the one who bears, or carries, the standard. The modern primary meaning evolved through symbolism: "a quality or measure which is established by authority, custom, or general consent". In the phrase "light standard" it retains the older meaning of a vertical support.
In technical use, a standard is a concrete example of an item or a specification against which all others may be measured. For example, there are "primary standards" for length, mass, and other units of measure, kept by laboratories and standards organizations.
Officially certified measuring instruments must be checked for accuracy
using such standards (or secondary standards made from the primary).
In analytical chemistry a standard is a preparation containing a known concentration of a specified substance. A simple standard may be a dilute solution of the substance; this serves as a reference to calibrate
equipment used to measure a sample's composition in terms of compounds or elements.
For accuracy, real samples are bracketed by known standards, that is, standards are analyzed that contain concentrations of the analyte that are less than and greater than the real sample's concentration.
There are also certified reference materials available which contain independently verified concentrations of elements available in different matrices (a matrix is bulk material of the sample, for example blood).
Since its 6th main incarnation, the arcade game Dance Dance Revolution has used Standard to refer to the sets of steps reserved for intermediate players.
See also
da:Standard
de:Standard
es:estándar
fr:Norme
Related links
Top visited
0 of
0 links
[no links posted yet]
>> place link >>
Discussion
Last posted
0 of
0 messages
[no messages posted yet]
>> post message >>
Watch
You can
add this article to your own "watchlist" and receive e-mail notification about all changes in this page.
