020219gkrecycle gc recycle chromatography jiri sevcik prague, the czech republic
TRANSCRIPT
![Page 1: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/1.jpg)
020219GK RECYCLE GC
RECYCLE
CHROMATOGRAPHY
Jiri SEVCIKPrague, the Czech Republic
![Page 2: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/2.jpg)
020219GK RECYCLE GC
ABOUT
CHARACTERISTICS
SEPARATION EFFICIENCY
RESOLUTION
RECYCLE CHROMATOGRAPHY HW
![Page 3: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/3.jpg)
020219GK RECYCLE GC
multidimensional chromatographySYSTEMS
serial
parallel
KD1 <> KD2 <> KDd
![Page 4: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/4.jpg)
020219GK RECYCLE GC
SCHEMATICSof recycle chromatography
INJECT R1
tM
w0
INTERFACE
tMex
wew
COLUMN
tRa/ , tRb
/
wa , wb
R2 DETECT
tMdet
wdet
LOOP COUNTER i
![Page 5: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/5.jpg)
020219GK RECYCLE GC
recycle chromatographyCOMPONENTS AND VARIATIONS
components possibilities
chromatography
GC LC
column type packed capillary
switching interface
valve valvelessend column split
mobile phase source
const. P const. F pump
![Page 6: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/6.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYPARAMETERS
retention time elution profile width separation efficiency resolution
![Page 7: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/7.jpg)
020219GK RECYCLE GC
RETENTION TIMEin recycle chromatography
INJECT R1
tM
INTERFACE
tMex
COLUMN
tRa/ , tRb
/
R2 DETECT
tMdet
LOOP COUNTER i
![Page 8: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/8.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYRETENTION TIME
from an injector to a detector
within a loop after i loops
det/
1 MRaMexMRa ttttt
/12 RaMexRaRa tttt
/1 1 RaMexRaiRa ttitt
![Page 9: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/9.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYRETENTION TIME
retention time between consecutive cycles is constant total retention time is additive
consttttt RaMexiRaiRa /
1
![Page 10: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/10.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYRETENTION TIME PROOF of ADDITIVITY
Retention time increment - 20 metresy = 1E-05x + 1,4435
R2 = 0,0136
1,430
1,435
1,440
1,445
1,450
1,455
1,460
0 50 100 150 200 250total time [min]
![Page 11: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/11.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYRETENTION TIME PROOF of ADDITIVITY
Retention time increment - 50 metresy = -3E-05x + 4,6388
R2 = 0,0109
4,5904,6004,6104,6204,6304,6404,6504,6604,6704,6804,690
0 50 100 150 200total time [min]
![Page 12: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/12.jpg)
020219GK RECYCLE GC
RETENTION TIME IN RECYCLE CHROMATOGRAPHY
E:\cyklicka\met4 21.07.1999 07:54:15
RT: 0,00 - 200,00 SM: 15B
0 5 10 15 20 25 30 35 40 45 50 55 60 65
Time (min)
0
20
40
60
80
100 NL:1,34E8
TIC MS met4
70 75 80 85 90 95 100 105 110 115 120 125 130
Time (min)
0
1
2
3
Rel
ativ
e Ab
unda
nce
NL:1,34E8
TIC MS met4
135 140 145 150 155 160 165 170 175 180 185 190 195
Time (min)
0,0
0,2
0,4
0,6
0,8
NL:1,34E8
TIC MS met4
![Page 13: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/13.jpg)
020219GK RECYCLE GC
ELUTION PROFILE WIDTHof recycle chromatography
INJECT R1
w0
INTERFACE
wew
COLUMN
wa , wb
R2 DETECT
wdet
LOOP COUNTER i
![Page 14: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/14.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYELUTION PROFILE WIDTH
from an injector to a detector
within a loop after i loops
2
det222
02
1 wwwww aexa
2221
22 aexaa wwww
2221
2 1 aexaia wwiww
![Page 15: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/15.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYELUTION PROFILE WIDTH
elution profile width between consecutive cycles is constant total peak width is additive in form of their variances
constwwww aexiaia 222
12
![Page 16: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/16.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYPEAK WIDTH PROOF of ADDITIVITY
Width increment - 20 metres y = 0,0036x + 1,7421
R2 = 0,0016
-40
-30
-20
-10
0
10
20
30
0 50 100 150 200 250 300 350
profile width [sec2]
![Page 17: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/17.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYPEAK WIDTH PROOF of ADDITIVITY
Width increment - 50 metres y = 0,0113x + 5,9856
R2 = 0,0075
-20
-10
0
10
20
30
40
0 50 100 150 200 250 300 350
profile width [sec2]
![Page 18: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/18.jpg)
020219GK RECYCLE GC
PEAK WIDTH IN RECYCLE CHROMATOGRAPHY
y = 0,0007x - 0,0014
R2 = 0,9985
0
0,02
0,04
0,06
0,08
0,1
0 20 40 60 80 100 120 140
i
wa(
i)2 [
min
2 ]
![Page 19: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/19.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYSEPARATION EFFICIENCY
number of effective plates
after a loop
2
2)1(
)1()(
*16 det)1(
a
MMMR
w
ttttn exa
2
2)2(
)2()*2(
*16 det)2(
a
MMMR
w
ttttn exa
![Page 20: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/20.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYSEPARATION EFFICIENCY
number of effective plates after i loops
2)1(
2)1()(*)1(
1
**
a
ai
w
wi
inin
![Page 21: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/21.jpg)
020219GK RECYCLE GC
RECYCLE SEPARATION EFFICIENCY PROOF of ADDITIVITY
y = 17148xR2 = 0,9958
y = 1579xR2 = 0,9752
y = 51694xR2 = 0,9866
0
500 000
1 000 000
1 500 000
2 000 000
2 500 000
0 50 100 150
number of loops
plat
e nu
mbe
r
5 metrů
20 metrů
50 metrů
![Page 22: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/22.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYEXTRA COLUMN EFFECTS
number of effective plates after i loops
2)1(
2)1()(*)1(
1
**
a
ai
w
wi
inin
2221
22 aexaa wwww
![Page 23: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/23.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYEXTRA COLUMN EFFECTS
ratio ni / n1
Influence of extra-column effects on recycle system efficiency
60
70
8090
100
110
0 2 4 6 8 10 12
number of cycles i
rati
o
(ni/
n1)
in
%
5% 10% 15% 20%
![Page 24: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/24.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYEXTRA COLUMN EFFECTS
ratio ni / n1
an inlet part of a column is unefficient
THUS efficienty increases faster in recycle system than in nonrecycle system it is not correct to express separation efficiency in terms of the theoretical plate number
![Page 25: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/25.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHYEXTRA COLUMN EFFECTS
cycles t Rw1/2 cycles t R
w1/2
[number] [min] [sec2] [number] [min] [sec2]
1st half 1 to 39 1 to 69mean x = 0,322 1,356 1,444 2,422deviation s = 0,004 1,264 0,002 1,750
2nd half 40 to 78 70 to 138mean x = 0,322 1,071 1,445 2,261deviation s = 0,004 5,216 0,008 12,148
1st and 2nd half 1 to 78 1 to 138mean x = 0,322 1,212 1,445 2,341deviation s = 0,004 3,795 0,006 8,677
linear velocityu [cm*s-1] 25,9 23,1plate numbern (rem.1) 118 002 25,086 104,040 2 270 494 199,540 345,960
column length 5 m column length 20 m
![Page 26: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/26.jpg)
020219GK RECYCLE GC
SEPARATION IN RECYCLE CHROMATOGRAPHY
retention interval of unseparated mixture in one-dimensional system in recycle system
t
tb ta
)(11 ababttt RR
)()( abiaibtitt RR
![Page 27: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/27.jpg)
020219GK RECYCLE GC
SEPARATION IN RECYCLE CHROMATOGRAPHY
retention interval of unseparated mixture
increases over the column lenght untill 1st peak leaves the column while the last one just enters the column then peak will merge again
THUS maximum number of cycles
t
tb ta
![Page 28: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/28.jpg)
020219GK RECYCLE GC
RECYCLE SEPARATION EFFICIENCY PROOF of ADDITIVITY
0 5 10 15 20 25 30 35 40 45 50 55 60 65
0
20
40
60
80
100
B10 B11
A0+B0
B9 B8 B7 B6 B5
B4 B3
B2 B1
A11 A10 A9 A8 A7 A6 A5 A4 A3
A2 A1
70 75 80 85 90 95 100 105 110 115 120 125 130
0
2
4
6
8
10
12
A12 B22 B21 B20 B19
B18 B17 B16 B15
B14 B13
B12
A23 A22 A21 A20 A19 A18 A17 A16 A15 A14 A13
135 140 145 150 155 160 165 170 175 180 185 190 195 Time (min)
0
1
2
3
4
5
B34
B23
A27+B26
B33 B32 B31 B30 B29 B28 B27 B25 B24
A35 A34 A33 A32 A31 A30 A29 A28
A26 A25 A24
![Page 29: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/29.jpg)
020219GK RECYCLE GC
MAXIMUM NUMBER OF CYCLES IN RECYCLE CHROMATOGRAPHY
t
tb ta
)(
/
maxab
R
t
tINTi a
)(11 ababttt RR
det/
1 MRaMexMRa ttttt
![Page 30: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/30.jpg)
020219GK RECYCLE GC
RESOLUTION IN RECYCLE CHROMATOGRAPHY
retention order can not change because of the same st.phase ( remains constant)
n
kk
kkR
ba
baab *
2*
1
1*
2
1)1
nik
kR
b
bab **
1*
1*
4
1maxmax
![Page 31: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/31.jpg)
020219GK RECYCLE GC
MAXIMUM AVAILABLE RESOLUTION IN RECYCLE CHROMATOGRAPHY
nitt
tR
abR
abab
a
***4
1max
)(/
)(max
max/)( 1
max
1
it
t
R
R
aR
ab
ab
ab
![Page 32: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/32.jpg)
020219GK RECYCLE GC
REQUIRED SEPARATION EFFICIENCY IN RECYCLE CHROMATOGRAPHY
for required resolution , k and n can be optimized if Rab = 1 an optimum number of cycles results
1
1
abopt Ri
n
kk
kkR
ba
baab *
2*
1
1*
2
1)1
reqR
ab
ab
ab
it
t
R
R
areq
1/
)(1
![Page 33: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/33.jpg)
020219GK RECYCLE GC
RECYCLE SEPARATION EFFICIENCY NUMBER of CYCLES
0 5 10 15 20 25 30 35 40 45 50 55 60 65
0
20
40
60
80
100
B10 B11
A0+B0
B9 B8 B7 B6 B5
B4 B3
B2 B1
A11 A10 A9 A8 A7 A6 A5 A4 A3
A2 A1
70 75 80 85 90 95 100 105 110 115 120 125 130
0
2
4
6
8
10
12
A12 B22 B21 B20 B19
B18 B17 B16 B15
B14 B13
B12
A23 A22 A21 A20 A19 A18 A17 A16 A15 A14 A13
135 140 145 150 155 160 165 170 175 180 185 190 195 Time (min)
0
1
2
3
4
5
B34
B23
A27+B26
B33 B32 B31 B30 B29 B28 B27 B25 B24
A35 A34 A33 A32 A31 A30 A29 A28
A26 A25 A24
![Page 34: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/34.jpg)
020219GK RECYCLE GC
THE OPTIMAL NUMBER OF CYCLES IN RECYCLE CHROMATOGRAPHY
for isomers , k=5 and n=20,000
Rab1 = 0,29 and
the optimal number of cycles iopt= 3.3
0
5
10
15
20
25
30
1 1,005 1,01 1,015 1,02 1,025 1,03
selectivity
i
k= 5
k=10
k= 5
k=10
n = 10 000
n = 50 000
![Page 35: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/35.jpg)
020219GK RECYCLE GC
RECYCLE CHROMATOGRAPHY MAXIMAL NUMBER of CYCLES
0 5 10 15 20 25 30 35 40 45 50 55 60 65
0
20
40
60
80
100
B10 B11
A0+B0
B9 B8 B7 B6 B5
B4 B3
B2 B1
A11 A10 A9 A8 A7 A6 A5 A4 A3
A2 A1
70 75 80 85 90 95 100 105 110 115 120 125 130
0
2
4
6
8
10
12
A12 B22 B21 B20 B19
B18 B17 B16 B15
B14 B13
B12
A23 A22 A21 A20 A19 A18 A17 A16 A15 A14 A13
135 140 145 150 155 160 165 170 175 180 185 190 195 Time (min)
0
1
2
3
4
5
B34
B23
A27+B26
B33 B32 B31 B30 B29 B28 B27 B25 B24
A35 A34 A33 A32 A31 A30 A29 A28
A26 A25 A24
merged at start
merged once again
maximal separation
![Page 36: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/36.jpg)
020219GK RECYCLE GC
MS-SIM separation of GC non separated isomers
![Page 37: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/37.jpg)
020219GK RECYCLE GC
recycle capillary GCPRINCIPLE
recycling analysed mixture through single capillary column by means of peristaltic pump as mobile phase source and controling actually achieved separation by means of end column splitter
![Page 38: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/38.jpg)
020219GK RECYCLE GC
recycle capillary GCCONSTRUCTION
peristaltic pump providing optimal column flow for columns from 5 to 50 meters
fixed end column splitter
![Page 39: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/39.jpg)
020219GK RECYCLE GC
INSTRUMENTATION - interface IN RECYCLE CHROMATOGRAPHY
R1 40 m (injector)
R2 40 m (detector MS)
column flow
peristaltic pump
![Page 40: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/40.jpg)
020219GK RECYCLE GC
recycle capillary GCAPPLICATION
suited for componds up to C10
for limited number of compounds with similar physicochemical and chiral properties
first time separation of 3 stereoisomers of 3,4-dimethylhexane
on β–cyclodextrine with 2,000,000 plates
![Page 41: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/41.jpg)
020219GK RECYCLE GC
nonselective separation
Carbowax 20M300 m, 250 µm n = 500,000 n-dodecene isomers
![Page 42: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/42.jpg)
020219GK RECYCLE GC
selectivity of separation
separation of isomers also with a functional group in middle of carbon chainn-dodecenes
![Page 43: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/43.jpg)
020219GK RECYCLE GC
MS-SIM separation of GC non separated isomers
![Page 44: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/44.jpg)
020219GK RECYCLE GC
ABOUT
CHARACTERISTICS
SEPARATION EFFICIENCY
RESOLUTION
RECYCLE CHROMATOGRAPHY HW
![Page 45: 020219GKRECYCLE GC RECYCLE CHROMATOGRAPHY Jiri SEVCIK Prague, the Czech Republic](https://reader036.vdocument.in/reader036/viewer/2022062518/56649e4c5503460f94b41fad/html5/thumbnails/45.jpg)
020219GK RECYCLE GC
NEW GC METHODS development
sample preparationefficiencyselectivityhyphenationsensitivitydetection
software
ITP - GCrecycle GCstationary phasescomprehensivethermal modulationspectral detectorsdeconvolution
toward reduced ultimate uncertainty