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FAST GC

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 Calidus microGC

Calidus GC PDF acrobat-but 124p PDF 14mB

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TSE Thermal Signal Enhancement option

“FAST” GC
some “more  practical” Issues ”Theory”/Data HTM
Calidus GC 2012 PDF Overview acrobat-but
this is still but an Overview of
Calidus FastGC
for more details you will need to consult with Us !

The “Compromise”

high SPEED vs resolution

new 2012+ extended to 4 metres MAX per module but 8 metres 2 modules in series

column resistive heating 6 foot long MAX ) . . . compromised “intrinsic” column efficiency
0.28mm ID Columns ~3000 plates/meter Total N(t) 6000
compared to high resolution 0.28mm ID  30m N)t) 90,000
BUT analyses in 2 minutes vs 20-30 minutes optimised

“old” GCs : large Lab GC Ovens

High Enengy;kilowatts;  slow heating 60degC/min. . .  at lower temp ranges
0-100C; 40 100-200; 200-300 30 300-400 ???
Cool Down 5minutes to 50C, 10mins to 40C

“new” Calidus FAST GC

300 Watts max; 300degC permin . . . ideal for portable applications
ambient +5 degC to 400 degC
Cool down < 2mins to 40 degC

Fast GC vs idealised but slower R&D type separations

HC to C20 Details Restek E1387 Mix

Higher resolution > L and much greater time required

If you don’t need the Resolution then you can save time
- Accuracy improved . . . 10-20scans per peak

accuracy depends on speed of the A/D / time slicing of the Data Sys across peaks - obvious compromise in idealised Restek chromatogram
 - also may suffers in accuracy perhaps
re 1 to 3 scans per peak ? ideally minimum of 10scans per peak

see accuracy proven below for typical FAST GC
. . . obvious a simulated chromatogram or perhaps on a high speed
TOC GC/MS sytsem and “idealised”

Zoom

ComparisonFastVsHR
Calidus-Speed

Speed Relevance
from Process Control GC Perspective

Cost savings re finesse of production control raw materials product throughput etc - invaluable

Zoom

Who would Use Calidus FastGC Enviro Labs
Idealfor  field or lab preliminary scanning tool
 . . . for follow-up detailed High(er) resolution of target samples by GC and/or GC/MS
4metres (max of Calidus) 0.1mmID MXT Nt 32,000
 = 15metres 0.25mm
Peak Resolution
re Packed GC Column 30ft of 1/8”OD ~Nt 16,000

Huge potential; savings for work intensive laboratories

Process Control GC
many application can run at 20 times the speed
Economies of scale with finer control of process plants

2D-GC Applications
Heart Cutting eg First seperaton om a non-polar column with overlapping peaks separated on a polar column all in-line . . . on-line.
- can be equivalent to a single column separation with “millions of plates

Fast GC AND TSE
increases LOD by refocusing “broad” peaks/ post column . . . x14 to x40; particularly for many volatiles on a (mini-) TCD detector
requires air compressoer and “vortex” cooling

DISADVANTAGES Injected on-column Sample Capacity
 is less and requires a Split sample
BUT Sharper Peaks means LOD Limit of detection
so ~ the same

Calidus-Reroducibility

Zoom

Fast_C5-C44

FAST GC
high speed . . . separation in <120seconds
NOT minutes
AND
High Temperature C60+ or higher

far better than any process Control GC anywhere
“proven” to ASTM D2887 standards

D2887_FastvsGC

Process Control - SIMDIST D2887

“Approved” to ASTM Standards
Calidus certification . . .  pending

18x times Faster

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Calidus 2D GC + TSE

a simple powerful 2D-GC gas separation
- heartcut to 2nd column - 4mins ASK for details

with TSE capability

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TSE ( Targetted Signal Enhancement )
Vortex Cooling
- requires 80psi 4cfm air compressor but up to x75 increase in sensitivity for TCD
for Process GC : 6.5x3.x2” preferably separate or GC oven
- sub ppM LOD for CO2, CO, C2+ HCs, water, S-Compounds (?) potentially N2O (???) application to Lab GC ???? maybe ?

Examples Water x15x pic
C2 HCs ( Acetylene etc ) pic

Zoom

TSE-1-design
TSE-2-design
TSE-1-pic
TSE-Linearity

Zoom

CalidusGC-Models

Modularity
Detectors - micro FID & microTCD;  more coming
Injectors : SSIS and Aout FasSampling Vlaves
Valve Oven Module

(relatively) Simple add-on . . .  upgrade

CalidusGC-A
GC-Nessi-Text

Transportable,
robust design
& compatible with
Field use

CalidusGC-1Modules
CalidusGC-1NeSSi

some Theory Re UltraFAST GC - Increasing GC Speed some Tips PDF
The Rise and Fall of Expertise in Gas Chromatography(LCGC) PDF
Pivotal Article JofC 2004 195-267PDF

Resolution

for isothermal GC Nt=5.54(Tr/W50)^2; Neff=5.54((Tr-Ta)/W50)^2 k=(Tr-Ta(/Ta
Neff=N t x (k/k+1)
So. . .  R=1/4SqRt(Neff)

TZ-eqn

for Temp Prog GC

Fast GC Data (?) - evidence suggest 5m 0.1mm needs >300Hz Data System

Characteristic / ID

0.10mm

0.15mm

0.18mm

0.25mm

0.32mm

0.53mm

Helium Flow
(20-30cm/sec)

0.16

0.3

0.3

0.7

1.2

2.6

H2 Flow
 @40-60cm/csec

0.32

0.6

0.6

1.4

2.4

5.2

Sample Capacity

<10ng

<40

<50

50-100

400-500

1000-2000

Theoretical Plates/metre

8000

4000

3500

3200

2500

1800

 

Calidus(Max)
4m=32,000

 

 

10m=32000

15m=37500

 

TZ (Trenzzahl)

 (5m 0.1mm) 24(0.35s/300Hz
>10(0.11sec)

 

 

20

 

 

50micron FS GC columns are NOW available

but depends on heat rate ,
actual w50 and Hz*

*some GCs are h’ware limited

many OEMs wll NOT publish data because of this
some even refer to this as being “academic”

over the years some Catalog Products have been de-listed from catalogs; even some Suppliers are “Gone” !
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