Monthly Archives: April 2014
Titration, also known as titrimetry, is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte. Since volume measurements play a key role in titration, it is also known as volumetric analysis. A reagent, called the titrant or titrator is prepared as a standard solution. A known concentration and volume of titrant reacts with a solution of analyte or titrand to determine concentration.
|Titrator set up|
The word “titration” comes from the Latin word titulus, meaning inscription or title. The French word titre, also from this origin, means rank.
- Titration is an established analytical technique
- It is fast
- It is a very accurate and precise technique
- A high degree of automation can be implemented
- Titration offers a good price/performance ratio compared to more sophisticated techniques
- It can be used by low-skilled and low-trained operators
- No need for highly specialised chemical knowledge
Automated titrators follow a defined sequence of operations. This sequence is basically the same for all different models and brands. This sequence is performed and repeated several times until the endpoint or the equivalence point of the titration reaction is reached (titration cycle).
More complex applications require more steps, for example dispensing of an additional reagent for back titration, dilution of the sample, adjustment of the initial pH value, etc. These steps and the corresponding parameters are defined in the titration methods used by the titrator.
P&R Labpak offer a full range of titration equipment and associated consumables and chemicals such as Hydranal® reagents.
For more information visit:-
via Blogger http://ift.tt/1nMTk2M
|Apollo 13 launches from Kennedy Space Center, April 11, 1970|
|The Apollo 13 Command Module|
via Blogger http://ift.tt/1iBauMu
Kevlar® is the registered trademark for a para-aramid synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, this high strength material was first commercially used in the early 1970s as a replacement for steel in racing tires. Typically it is spun into ropes or fabric sheets that can be used as such or as an ingredient in composite material components.
Kevlar® is a material formed by combining para-phenylenediamine and terephthaloyl chloride. Aromatic polyamide (aramid) threads are the result. They are further refined, by dissolving the threads and spinning them into regular fibres. When woven, Kevlar® forms a strong and flexible material. If layers of the woven Kevlar® are combined with layers of resin, the resulting ‘rigid’ material is light and has twenty times the strength of steel. It is also superior to specialist metal alloys. However, Kevlar® is expensive due to the demands of the manufacturing process and the need for specialist equipment.
|Bullet Proof vests|
via Blogger http://ift.tt/1fGcnKg