商品编号


51107670



品牌


METTLER TOLEDO(梅特勒-托利多)



公司


METTLER TOLEDO



公司分类


Titrators



Size

1 Ea

商品信息

DS500
Surfactant sensitive sensor
Potentiometric surfactant titration with a surfactant sensitive electrode - a method suitable for most ionic and nonionic surfactants. For this technique in aqueous solutions METTLER TOLEDO offers the DS500 which is used in connection with the DX200 double junction reference electrode.
Specifications?-?DS500
Short description
Surfactant sensitive electrode for potentiometric titration of ionic and nonionic surfactants in aqueous solutions
Applications
Surfactant titration
Material Number(s)
51107670
Description
Principle
The potential of a solution containing surfactants is measured as a function of the titrant added. Potentiometric titrations are indicated with a surfactant sensitive electrode (SSE). The potential is formed by interaction between the ion carrier in the membrane and the analyte in the sample solution. It can be measured against a reference electrode at zero current. The potential-volume E-V curves obtained are usually S-shaped and can be easily evaluated for the largest change in potential. Thus, the standard evaluation is selected in the titration method. If the curve shows a pronounced asymmetric profile, then the asymmetric evaluation can be used.
Anionic
(cationic) surfactants are titrated with
cationic
(anionic) surfactants. Near the equivalence point, a precipitate is formed, and the solution becomes turbid. In the case of
nonionic surfactants
, addition of a specific activator prior to titration is necessary to form a complex between analyte and titrant.