| S |
|
| Sealing
Film |
A polymeric
film used to temporarily seal aqueous solutions. |
| Silica
Gel |
1.
A desiccant (drying agent) used in desiccators which is often treated
with cobalt chloride which will turn from blue to pink as the desiccant
becomes exhausted.
2. The
stationary phase in chromatographic separations |
| Silicone
Grease |
A grease
that is used to as a thin film on glass joints to prevent them from
seizing and to seal them in reduced pressure distillations. It may
also be used to seal the lids of desiccators. |
| Sintered
Glass |
A type
of glass that is made by heating powdered glass below its melting
point so that the particles stick to each other. The result is a material
which will allow liquids to pass through it but it will retain solid
material. Sintered glass can be used to make filters as well as the
support for the stationary phase in chromatography columns. |
| Standard
(Solution) |
A
solution of precisely known concentration used in volumetric analysis.
|
| Standardisation |
Using
volumetric analysis to detrmine the exact concentration of a standard
solution. |
| Stoichiometry |
The number
of moles involved in a reaction in accordance with the balanced equation. |
| Stationary
Phase |
The solid
phase in a chromatographic separation. |
|
|
