YOU LIKED DIGILAB'S GC/IR... DIGILAB'S GC/IR II HAS BOTH ADVANCED SOFTWARE AND REVOLUTIONARY HARDWARE GC/S IS THE FIRST AND ONLY REAL TIME GC/IR SOFTWARE SYSTEM. SOME OF THE REALTIME FUNCTIONS PERFORMED SIMULTANEOUSLY INCLUDE:* • FULL RESOLUTION ABSORBANCE SPECTRA, DISPLAYED AND STORED IN REAL TIME • TOTAL IR RECONSTRUCTED CHROMATOGRAM (ANALAGOUS TO THE TOTAL ION CURRENT MONITORING IN GC/MS) • UP TO FIVE FUNCTIONAL GROUP CHROMATOGRAMS (MULTIGRAMS), ANALAGOUS TO SELECTIVE ION MONITORING
OTHER OUTSTANDING FEATURES INCLUDE: • UP TO FOUR HOURS OF CONTINUOUS DATA COLLECTION AND STORAGE • OPERATOR'S CHOICE OF TRIGGERING DATA COLLECTION ON THE PRESENCE OF PEAKS IN ANY RECONSTRUCTED CHROMATOGRAM • CHOICE OF CONSTANT OR VARIABLE TIME RESOLUTIONS • STOP AND START DATA COLLECTION ANY TIME DURING THE GC RUN • GC RETENTION TIMES ARE ALWAYS PRESERVED, (CHROMATOGRAMS ARE PLOTTED AS A FUNCTION OF RETENTION TIME)
• COMPLEX EXPERIMENTS FROM DATA COLLECTION TO SPECTRAL SEARCH CAN BE SET UP EASILY AND STORED FOR FUTURE USE • HIGH SPEED ON-LINE SPECTRAL SEARCH • PERMITS THE USE OF AUTO INJECTION FOR MULTIPLE SAMPLES AND UNATTENDED OPERATION • POWERFUL INTERACTIVE GC PEAK EDITING SOFTWARE FOR ENHANCING GC RESOLUTION • SOFTWARE OPTIMIZED FOR CAPILLARY GC/IR
GC/C IS A NEW STATE-OF-THE-ART CAPILLARY GC/IR ACCESSORY WITH THE FOLLOWING REVOLUTIONARY FEATURES: • SENSITIVITY • OPTIMIZED FOR USE WITH WIDE BORE (0.5mm) OR NARROW BORE (.25mm) WCOT, SCOT, OR SILICA COLUMNS • NO LOSS OF GC RESOLUTION (ZERO DEAD VOLUME) • INERT ALL GLASS SYSTEM
VISIT US AT THE PITTSBURGH CONFERENCE BOOTHS #7034-7041 GC/S is compatible with capillary or packed column accessories. 190 A · ANALYTICAL CHEMISTRY, VOL. 53, NO. 2, FEBRUARY 1981
YOU'LL LOVE DIGILAB'S GC/IR II! CONDITIONS SAMPLE:
Equal volumes of methanol, ethanol, isopropanol, tetrahydrofuran, benzene, p-dioxane, toluene, l-octene, m-xylene, o-xylene, isobutyl-methacrylate, butyl ben zoate, geraniol, and isoeugenol. Varian 3700 80°-190°C, 4°C per minute 0.15μΙ 250 °C TCD230°C 210°C 210°C He 14ml/minute He 16ml/minute 400' χ 0.03 "SE30 Glass 2 0.5 mv
GAS CHROMATOGRAPH: OVEN: INJECTION: INJECTION PORT: DETECTOR: LIGHT PIPE: TRANSFER LINES: CARRIER GAS: MAKE-UP GAS: COLUMN: ATTENUATOR: RANGE: Figure 1. Photograph of the display during GC-IR data collection showing the Gram-Schmidt reconstructed chromatogram (bottom) and the full 8cm-1 resolution absorption spectrum (top). Butyl benzoate is the GC fraction that is passing through the light pipe.
ISOPROPYL ALCOHOL 1050V «IT 1 2 3 4 :3 6
CKPD 520 370 58 424 201 211
SERSCh RESULTS FOP PER* * T 478 INDEX CHS NUWBE» CRS NftHE 0.1881 6 7 - 6 3 - 0 ISOPROPYL RLCOMOL 0.3526 75-65-0 BUTYL RLCDK+OL, T E H T - , 0.3726 75-85-4 2-BUTRNOL. 2 - H E T H Y L - t 0.3794 78-92-2 2-BUTRNGL 0.3996 595-41-5 3-PEMTRMOLt 2 , 3 - B I « E T H Y L 0.4022 598-75-4 2-BUTRNDL» 3 - H E T M Y L - .
P-DIOXANE IT 2 3 4 5 6
506V
SEHRCH RESULTS FOR PERK RT 601 CMPD INDEX CHS NUMBER CflS NONE 375 0 . 1 8 9 4 123-91-1 P-DIDXHNE 134 0 . 4 9 7 6 1 12-48-1 ETHHNEr 1-2-DIBUTDXY-. 663 0 . 5 0 7 5 112-73-2 ETHER. BIS.-2-BUTaXYETHYL.--. 131 0 . 5 1 2 7 629-14-1 ETHHNE. 1 . 2 - D I E T H D X Y - . 779 0.5282 5131-66-8 2-PRQPHNQL. 1-BUTÛXY-. 1 12-34-5 ETHnMDL. 2 - ' 2 - B U T Q X Y ^ E T H Q X Y - . 404 0 . 5 3 3 "
M-XYLENE 139V
Figure 2. Photograph of the alternate display during GC-IR data collection showing five functional group reconstructed chromatograms in real time.
MIT CHPE
ι
2 3 4 5 6
887 ÏERRCH RESULTS FDR PEP* RT CHS MHME NEEX CHS MUMPER 108-3.8-3 M-XYLENE 4 046 526-73-* BEN-ENE. 1 . 2 . 3 - T R I M E T H V L 49 01 612-75-9 B I T D L Y L . M.NPR-. 5363 105-67-8 BEM-ENE. W 3 . 5 - T R I H E T H Y L 5610 106-42-3 Ρ-XYLENE 57 04 Β Ε Ν Λ Ε Ν Ε . 1.2.4-TRIMETHYL 95-63-6
?a ο
923 342 79* a?i 75
0 0 0 ο 6
O-XYLENE 1579V SEARCH RESULTS FOR PER* HT 944 H I T CUP > INDEX CBS NUMBER COS NAME ι eo6 » . 1337 9 5 - 4 7 - 6 O-XYLENE 575-41-7 NHPHTHHLEME. I t 3 - D I M E T M Y 2 180 0 . 4 5 8 7 3 538 0.5403 1 0 0 - 4 1-4 B E M N E M E , ETWYL-. 104-51-e BEMsEHE, B U T Y L - . * 902 0 . 3 7 7 9 526-73-8 BENZENE» 1.J.3-TPIMETHYL 5 923 0.5862 6 2 6 0 . 6 064 108-88-3 BENZENE. METHYL-·
Figure 3. Photograph of the display during the interactive peak editing mode. The cursors locate a peak in the reconstructed chromatogram which is being analyzed.
Total infrared absorption reconstructed chromatogram is obtained from the interferograms. Scan sets containing infrared absorbing species are used in computing the absorbance spectra. Multigrams are obtained from the absorbance data. Spectral search is performed using the complete infrared spectrum of the unknown. For more details on the total infrared absorption reconstruction and the spectral search routines refer to Digilab FTS-IR Note #29.
Join the Leader in Infrared.
DIGILAB Figure 4. Photograph of the display during the interactive peak editing mode showing the infrared absorption spectrum of butyl benzoate. The cur sor can be moved to locate the frequency of any band in the spectrum.
Division of Bio-Rad Laboratories 237 Putnam Avenue Cambridge, Massachusetts 02139 Telephone (617) 868-4330
CIRCLE 62 ON READER SERVICE CARD ANALYTICAL CHEMISTRY, VOL. 53, NO. 2, FEBRUARY 1981 · 191 A
