Agilent Self-Tightening Column Nut · 2016. 9. 4. · Agilent Self Tightening Column Nuts Designed...
Transcript of Agilent Self-Tightening Column Nut · 2016. 9. 4. · Agilent Self Tightening Column Nuts Designed...
May 27, 2014
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RIVA 2014 COMPLETE YOUR AGILENT TOUR
Better Connections with Agilent Ken Lynam CSD R&D/Applications Chemist, Wilmington, DE USA
GC column installation is a challenge
A routine, basic procedure, but
not easy to do
Plus – a minimum of 2 chances
to get it wrong !
• Very small parts
• Wrenches in cramped, dark
space
Even when done correctly,
fittings are known to be prone
to leaks
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How do you make leak free column connections? Start with the right tools and supplies
Assemble the parts
• Column Nuts
• Material : stainless – but need brass for MS interface
• Finger tight available for graphite ferrules
• Choice of right ferrules
Make a good clean cut – every time
• After ferrule is installed
• Fused silica tubing cutters : ceramic
• Magnifier to inspect the cut
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polyimide
Which Capillary Ferrules?
Composition Re-use Max T Use Limitation
Polyimide (Vespel) yes 280 Easy seal Shrink after heating causing leaks after
thermal cycle; isothermal only
Graphite yes 450 Not MS or
ECD
Contamination, leakages – not for
oxygen sensitive detectors
Polyimide/graphite
(85% / 15%)
limited 350 MS Still shrink after thermal cycles creating
leaks; need to retighten regularly
Flexible metal no 450 CFT … May not seal well with damaged rough
surfaces
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polyimide/graphite graphite
“Long” ferrules for MS transfer lines and MS interface nut
“Short” ferrules for inlet and detector configurations on Agilent GC’s
flexible metal
Graphite / polyimide capillary ferrules
… leak after normal temperature program runs
Studies show the leaking continues with use of the ferrules
Not just the first one or two runs
Frequent re-tightening of the fitting with graphite/polyimide
ferrules is needed to maintain a leak-free seal – and system
performance and productivity
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Agilent Self Tightening Column Nuts
Designed for use with short graphite/polyimide blend ferrules –
both at the inlet and the MS interface – so only one type of ferrule
needed for both ends of the column!
Short ferrule exposes more thread of the fitting for better sealing
For mass spec transfer line For inlet or detector
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Benefit of Self-Tightening Column nuts
Without retightening,
the baseline remains
flat after 400 runs
with no indication of
leaks when using the
Self Tightening
column nuts
Take you from this….
…. to this!
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Better Connections 1: Glass connectors
• UI Chemistries applied to
press fit connectors
• Improved inertness
performance
• Best in class inertness
• Easier to use than competitors
because you can see it work!
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Comparison UI pressfit to presstight Siltek deactivated
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11.51110.5109.598.587.576.565.554.543.532.521.510.5
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2
0
-2
-4
-6
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-20
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-28
1.33
1.41
1.85
2.31
2.62
2.85
2.97
3.76
4.17
6.22
6.77
7.51
8.459.42
10.38
1.36
1.44
1.71
1.88
2.36
2.67
2.91
3.03
3.82
4.25
6.326.89 7.63
8.599.57
10.55
RT [min]
GC28B_CONNECTOR-005_VIM2_9253640_CP4787_lot723838_2_1_1.DATAGC28B_CONNECTOR-007_VIM2_9253640_UI_pressfit_RG_1_1.DATA
pA
XOffset : 0.2
YOffset : -30
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3 4
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12 13 14
UI pressfit
Presstight, Siltek
deactivated #20480
Excellent inertness, but
Siltek deactivated
connector not transparant
Testing 86 hrs 325°C:
PASSED
Better Connections 2: CFT is best in class
“The un-purged splitter is so much better than a glass “Y”
splitter because it was simple to put together. The new
ferrules really made it easy. Since we installed it there have
been no leaks and the performance is excellent. These
results will be in my thesis”
Forensics Toxicology Graduate Student
Pennsylvania State university
• Ultimetal Plus deactivation for
superior inertness
• Easy to assemble
• They don’t leak!
• New pricing
• Kitted for easy ordering
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Ultimetal Plus Tubing and Fittings
• 0.53 and 0.25 mm ID guards and
transfer lines
• Metal fittings (unions, tee’s and
nuts)
• Steel tubing (1/16”, 1/8”, ¼”)
• Ultimetal Plus fused silica guard
columns
Superior performance for
configured systems in HPI,
environmental and other
application spaces.
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5.254.84.64.44.243.83.63.43.232.82.62.42.221.81.61.41.210.80.60.40.20
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-10
-20
0.69
0.73 0.92
1.141.29
1.37
1.43
1.77
1.96
2.86
3.12
3.44
3.86 4.29 4.73
0.68
0.72 0.91
1.151.30
1.38
1.44
1.80
2.00
2.94
3.20
3.52
3.964.40
4.85
RT [min]
GC38F_UIUM-036_VIM2_CP8944-9294947_6510716_end_2m_10_1.DATAGC38F_UIUM-036_VIM2_CP8944-9294947_MXT 70294-1178464_2m_11_1.DATA
pA
XOffset : 0
YOffset : 140
Guards:Tandem test 2 m 0.53mm ID pieces using a VIM2 mix
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CF 4.7 mL/min H2
oven 60°C
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Conclusion:
UltiMetal Plus Guard gives equal or better inertness compared to MTX Biodiesel T G .
Great results for inertness.
Agilent UltiMetal Plus Guard
MXT Biodiesel TG Guard
4-picoline
Avg corr. As 6.6
Avg. Abs. recovery 103%
4-picoline
Avg corr. As 2.3
Avg. Abs. recovery 103%
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VIM2 (split 1:75)
# Compound ng
1 Methane
2 Propionic acid 1
3 iso-Butyric acid 1
4 n-Butyric acid 1
5 Octene 0.5
6 Octane 0.5
7 1-Nitrobutane 1
8 4-Picoline 2
9 Trimethyl Phosphate 5
10 1,2-Pentanediol 2
11 Propylbenzene 1
12 1-Heptanol 1
13 3-Octanone 1
14 Decane 1
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UltiMetal on the outside
for improved inertness
Bare Steel
Testing the outside of a metal capillary for
24 hrs at 450°C:
Metal outside
of the column
in flow path
INLET
CPM union, inert
Metal outside of the column in flow
path
Fleximetal ferrule
Invention disclosure filed.
Making Better GC Connections
• Select supplies appropriate for your instrument and
application
• Follow recommended assembly process
• Maximize productivity by using innovative tools and supplies
Column Installation Pre-swaging tools
Self Tightening column nuts
Ultra Inert Press Fit connectors
UltiMetal Plus Flexible metal ferrules
UltiMetal Plus tubing and fittings
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RIVA 2014 COMPLETE YOUR AGILENT TOUR
May 27, 2014
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It’s a Great Story!
Thanks to great innovation and product development…
What started with the Inert Flowpath program last year is now
expanding to include all of the flow components in the GC.
This means challenging applications are now EASIER and
FASTER to implement, delivering superior performance that
translates to INCREASED UPTIME and FASTER
LABORATORY OPERATIONS.
NOW IT’S EASIER THAN EVER TO GET RELIABLE GC RESULTS THROUGH BETTER GC CONNECTIONS
FROM AGILENT
www.agilent.com/chem/betterGCconnections
Order the poster… View the video…
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Acknowledgements
• Agilent colleagues
• Lindy Miller
• Yun Zou
• Gary Lee
• Paul Trip
• Roger Firor
• You for your kind attention
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Questions?
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