|
Silica |
Ultra
pure (99.995 %) B type |
|
Particles : |
Spherical |
|
Particle
size : |
|
|
|
3
µm +/- 0.2 |
|
|
5
µm +/- 0.3 |
|
|
7
µm +/- 0.5 |
|
|
10
µm +/- 1.0 |
|
|
15
µm +/- 2.0 |
|
|
20
µm +/- 2.0 |
|
|
50
µm +/- 5.0 |
|
Surface
/ Pore size : |
|
|
|
[500
m2/g +/- 50] / [60 Å +/- 10] |
|
|
[320
m2/g +/- 40] / [120 Å +/- 15] |
|
|
[100
m2/g +/- 20] / [300 Å +/- 40] |
|
|
[60
m2/g +/- 10] / [500 Å +/- 55] |
|
Metal
trace : |
<
20 ppm (Fe < 1 ppm) |
|
pH
stability : |
1.5
¢
7.5 |
|
Our
Upti-prep silica has two major advantages:
-
Surface energy is lower than all generation "A
type" silica and many "B type" silica. This
guarantees a perfect peak shape for analysis of basic compounds.
-
Actives sites are easily accessible, resulting in greater
capacity without the risk of clogging.
|
|
|
The pyridine and guajakol
inertness tests (with a special zeolite probe) are part of the
essential tests for each silica batch manufactured
|
|
|
1.Pyridine
test |
|
|
Methanol/water
80/20
Flow
rate (ml/mn) : 1.00
Pressure
( bars) : 133
Temperature
: room
Detection
(nm) : UV 254
1.
Pyridine
2.
Phenol |
|
| - |
TR
(s) |
Efficiency
(N) |
Symmetry
(at 10 %) |
| 1.
Pyridine |
197.80 |
14249 |
1.09 |
|
2.
Phenol |
212.30 |
16415 |
1.19 |
|
[1.0
< Symmetry (10%) of the pyridine < 1.15] |
|
|
Methanol/water
: 80/20
Flow
rate (ml/mn) : 1.00
Pressure
( bars) : 133
Temperature
: room
Detection
(nm) : UV 254
1-
2.2’-bipyridil
2-
Guajakol
3-
2.3-dihydroxynaphtalene |
|
[1.0
< Symmetry (10%) of the guaiacol < 1.15] |
Pore
geometry, combined with extreme mechanical stability governs the
excellent lifetime characteristics of the Modulo-cart Quick Seal
column packed with Upti-prep Silica.
This
also proves to be an excellent tool for preparative chromatography.
The
behaviour of our silica has been tested under several conditions by
an independent organisation. It has been notably observed that it
could sustain several packings and unpackings without damaging the
integrity of the matrix. |
|
