The inertness of Ultra ALLOY
TM stainless
steel columns matches that of fused silica and is
derived from a patented, multi-step manufacturing
process which utilizes a five-layered pretreatment of
the inner surface of the stainless steel.
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High temperature stability |
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Highly inert deactivated inner surface |
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Exceptional mechanical durability-cannot
break! |
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Perfect for field use or high vibration
situations |
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Can be tightly coiled (3 inches) for
portable GCs |
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Ideal for use in small, field portable
GCs |
Each layer
is chemically stable at elevated temperatures and has
equal to, if not superior, mechanical properties to that
of the steel tubing. The layers are less than 0.01
microns thick and are chemically bonded together.
Stationary phases are then easily bonded to this stable
inert surface resulting in superbly deactivated columns
which compare directly to fused silica columns.
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SEM images of
Ultra-Alloy tubing surface,
before deactivation (left)
and after
deactivation (right). |
Compare
with this SEM photo of
stainless steel tubing with a
layer of fused
silica |
Ultra ALLOY
TM
capillary columns offer unsurpassed inertness and
mechanical durability and are suitable replacements for
fused silica capillary columns. Unlike other stainless
steel columns on the market, Ultra- ALLOY TM
columns are not lined with fused silica (see photo
above) which can crack or flake-off when flexed or bent
thus exposing active sites. As a result, the Ultra-ALLOYTM
columns can be tightly coiled to accommodate even the
smallest of GC oven designs.
Ultra ALLOY
TM
columns are available in the standard 0.25mm and
0.53mm I.D.s The tables below list the
available bonded phases, films and maximum temperatures.
Deactivated Ultra
ALLOY TM
tubing is also available for transfer lines and guard
columns.
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PHASE DESIGNATION |
CHEMICAL COMPOSITION |
GENERAL AREA OF USE |
NON-POLAR
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UAC-1MS |
Dimethylpolysiloxane-HT |
HIGH PERFORMANCE/HIGH TEMP. -
boiling point column, general purpose:
hydrocarbons, solvents, waxes, pharmaceuticals,
flavors, etc. |
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UAC-1 |
Dimethylpolysiloxane |
boiling point column, general purpose:
hydrocarbons, solvents, waxes, pharmaceuticals,
flavors, etc. |
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UAC-5MS |
(5% Phenyl) Methylpolysiloxane-HT |
HIGH PERFORMANCE/HIGH TEMP. -
boiling point column, general purpose:
aromatics, hydrocarbons, solvents, waxes,
pharmaceuticals, flavors, etc. |
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UAC-5 |
(5% Phenyl) Methylpolysiloxane |
boiling point column, general purpose:
aromatics, hydrocarbons, solvents, waxes,
pharmaceuticals, flavors, etc. |
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UAC-DX30 |
Carborane-siloxane |
high temperature column similar
to Dexsil 300 phase type |
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SLIGHTLY POLAR
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UAC-624 |
Cyanopropylphenyl
Methylpolysiloxanes |
EPA
Method applications: volatiles and
semi-volatiles in drinking water, ground water,
pesticides, herbicides, etc. |
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MID-POLARITY
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UAC-65HT |
(65% Phenyl)
Methylpolysiloxane |
triglycerides, biodiesel |
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POLAR
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UAC-CW |
Polyethylene
Glycol (PEG) |
alcohols, free acids, essential oils, solvents,
aromatics, BTEX, flavors and fragrances |
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