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((Short description|General term for feeding small quantities of chemicals or medicines))
((Refimprove|date=December 2016))

'''Dosing''' generally applies to feeding [[chemical]]s or [[medicine]]s when used in small quantities.

For medicines the term ''[[dose (biochemistry)|dose]]'' is generally used. In the case of inanimate objects the word dosing is typical. The term '''dose titration''', referring to stepwise [[drug titration|adjustment]] of doses until a desired level of effect is reached, is common in [[medicine]].

==Engineering==
The word ''dosing'' is very commonly used by [[engineer]]s in thermal [[power stations]], in water treatment, in any industry where [[steam]] is being generated, and in [[building services]] for heating and cooling water treatment. Dosing procedures are also in vogue in [[textile]] and similar industries where chemical treatment is involved.

Commercial [[Swimming pool sanitation#Systems and disinfection methods|swimming pool]]s also require chemical dosing in order to control [[pH]] balance, [[chlorine]] level, and other such water quality criteria. Modern swimming pool plant will have bulk storage of chemicals held in separate '''dosing tanks''', and will have automated controls and '''dosing pumps''' to top up the various chemicals as required to control the water quality.

In a power station treatment chemicals are injected or fed to [[boiler]] and also to feed and make up water under [[pressure]], but in small dosages or rate of [[Injection (medicine)|injection]]. The feeding at all places is done by means of small capacity dosing [[pump]]s specially designed for the duty demanded.

In building services the water quality of various pumped fluid systems, including for heating, cooling, and condensate water, will be regularly checked and topped up with chemicals manually as required to suit the required water quality. Most commonly [[Corrosion inhibitor|inhibitor]]s will be added to protect the pipework and components against corrosion, or a [[biocide]] will be added to stop the growth of bacteria in lower temperature systems. The required chemicals will be added to the fluid system by use of a '''dosing pot'''; a multi-valved chamber in which the chemical can be added, and then introduced to the fluid system in a controlled manner.

In food industries, the dosing of ingredients is particularly important in order to ensure the quality of the recipe as well as its food safety where the consumers' health may be directly implicated. Dosing is done in wet processes with dosing pumps but even more importantly in dry processes, just prior to the packaging of the product. Dosing of dry materials is commonly done through Gain-in-Weight dosing or Loss-in-Weight dosing using equipment on load cells.<ref>http://www.powderprocess.net/Dosing.html Source on dosing principles for dry ingredients</ref>

==Agriculture==
[[Pesticide application|See pesticide application]]

The feeding of chemicals in [[agriculture]] has also become common due to technology developments. However [[Pesticide application|agricultural dosing]] is done by means of hand held pressure spray pumps.

===Aerial spraying===
Sometimes aerial spraying of chemicals by fixed quantities at intervals or dosing is also adopted for agricultural spraying or for atmospheric spraying for eliminating certain types of harmful [[insect]]s.

== References ==
((Reflist))

[[Category:Engineering concepts]]
[[Category:Agricultural terminology]]
[[Category:Pharmacodynamics]]

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