•
Refer to pages 73–
7S
for a listing of
replacement needles.
Which Needle?
Needleselection isbasedon application and
personal choice.
--
._-----~~.
-
~-
.............................................
Fixedneedlf.'_
RemovaOleneedle
Fixed Needle or
Removable Needle Syringes:
Fixed needlesyringesareoften the preferred
option for experienced operators or for
applications requiring trace sample levels.
A fixed needle syringe is recommended for
autosampler use where the probability of
needle bending isminimal. Fixed needlesare
easy to useand themost economical syringe
option. Fixed needle syringes can be heated
in an oven up to 70 "C.
For versatility a removable needle syringe
is recommended. The removable needle
syringe reducescost over time becauseonly
the needle needs to be replaced if bent or
blocked. Removable needle syringes can be
heated to 120"C. Removableneedlesyringes
allow the needle to be changed for different
applications.
SGE divides its removable needles into
different ranges:
• 5
~L
eVol·
• 5
~L
• 10
~L
• 25
~L
to 500
~L
(suitable for 50
~L
eVol· Syringes)
• 1mL to 2.5mL
(suitable for 500
~L
eVol· Syringes)
• 5mL to 10mL
• Luer Lock
• ValveNeedles
Needles can be easily changed to meet the
application need. For example: a standard
10
~L
removable needlesyringecan beeasily
converted for LCor on-column use.
Gauge or Outer Diameter (OD):
To reduce the possibility of bending, choose
the largest available needle outer diameter
suitablefor theapplication.For autosarnplers,
syringeswith 23 gaugeor 0.63mmODcone
tipped needles should be selected for all
applicationsexcept on-column injection.
Inner Diameter (ID):
The ID of the needle is selected to ensure
minimal deadvolumewi thout compromising
the ability of the syringe to draw normal
viscosity samples. Medium to high viscosity
samplesshould be diluted prior to useor a
larger insidediameter needle selected.
c:
HROIIII~I.J';tlc:
+61(0)397622034 Australian Distributors
l '
~
Importers
&
M.nufacurers
I
~/13
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ECI-II7471" 9 .,YPtYLtd
Website NEW:
E·mall : Info@c:hromtech.net.au Tel: 03 9762 2034 • • • In AUSTRALIA
8
