Multi-Dimensional GC/GCMS System MDGC/GCMS Series
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Multi-Dimensional GC/GCMS System

MDGC/GCMS Series Multi-Dimensional GC/GCMS System A multi-dimensional GC/GCMS system performs separation using two columns that have different characteristics. The system has a mechanism in which the components that are insufficiently separated in the first column they pass through (the "1st column") are introduced ("heart-cut") to a second, different column (the "2nd column"). This enables analysis with a level of separation that cannot be attained in conventional single-column analysis. In addition, the precise flow-switching technology, which is supported by a high-precision digital flow...

AuxPress Monitor Detector Only one peak is visible Detector Flow diagram of Standby mode AuxPress Monitor Detector Minute peak separated Switch to 2nd column Chromatogram Obtained with 2nd Column (Detector: MS) Chromatogram Obtained with 1st Column (Monitor Detector: FID) Flow diagram of Cut mode Analysis of Optical Isomers of Limonene in Commercial Lemon Water

Outstanding Retention Time Stability In the past, samples have been introduced to columns using the switching mechanism known as Deans switching. However, this system results in such problems as a reduced recovery rate and fluctuations in the retention time. The MDGC/GCMS series system incorporates multi-Deans switching, a new mechanism that significantly reduces the likelihood of fluctuations in the retention times of eluted components, even if switching is performed several times. Pressure P-ΔP2 Shift in Retention Time Multi-Deans Switching Standby (1st DET) No Shift in Retention Time 1.5...

Handling Quantitative Analysis with Deactivation Processing Chromatogram Obtained with 1st Column The multi-Deans switching mechanism in the MDGC/GCMS series uses a capillary method with a low dead volume. Since the internal surface has been subjected to deactivation processing, even in the analysis of alcohols with a high polarity, the peak form is the same as that obtained in GC analysis. For this reason, a superior level of peak reproducibility is attained, and analysis with a high level of quantitative accuracy is possible. Also, even after the multi-Deans switching mechanism performs...

Superior Intuitive Operability Structure analysis Quality control GC-GCMS System GC-GC System Excellent Peak Picking Capability The majority of the work involved in MDGC analysis consists of determining the analytical conditions and switching timing that allow the target components to be separated. For this reason, the software's operability has a great influence on work efficiency. The MDGC control software package, MDGCsolution, makes it possible to set the analytical conditions for both the 1st GC and 2nd GC or GCMS together. As a result, it is not necessary to switch between several...

Hig h - P re cisio n Flo w C o ntrol with AFC In the analysis of complex samples, because high-separation performance is required, the MDGC/GCMS series uses a dual-oven system consisting of two GC instruments of high-separation capability set up in parallel. With a single-oven system, at the time the peak to be heart-cut is eluted from the 1st column, the temperature of the column oven is often already high. In this state, even with the separation capability of the 2nd column, the results are lower than would be possible if the temperature of the column oven had been low at the time of...

Greater Ease of Maintenance Si m pl e P a r t R e p l a c e m e n t The switching element is secured to the front of the GC oven at the top, making it easy to replace columns and change connections to detectors and pretreatment systems. Also, stainless steel ferrules with high heat resistance are used for the column connections, so the additional tightening required with conventional Vespel ferrules is not necessary, and burning does not occur. SilTite Ferrule Switching Element Si m pl e S w i t c h i n g t o C o n v e n tio n a l GC /GC MS When not using the MDGC-2010 as an MDGC system,...

MDGCsolution Software package GCsolution Software package NIST Library Printer MDGCsolution Software package Printer GCsolution A W i de Va r i e t y o f O p t i on a l S y ste ms In addition to GCMS, various other detectors, such as an FID or FPD, can be used with the MDGC/GCMS-2010. For example, a headspace sampler and thermal desorption system can be connected and controlled as a pretreatment system. MDGC GCMS Pretreatment system SPME injector Headspace sampler Thermal desorption system* (TD-20) *Available by special order. MDGC/GCMS Series Multi-Dimensional GC/GCMS System

Petroleum Analysis Bat c h A n a l y s i s o f O x y g e n a te d C o mp o n e n ts in Ga so lin e With gasoline, a large number of hydrocarbon peaks are eluted, making it difficult to completely separate oxygenated compounds, such as the alcohols that have been added in recent years, using GC-FID. Improving separation using MDGC analysis enables the analysis of components for which separation and quantitation would be difficult using conventional FID. The analysis of the 13 components specified by ASTM D 4815-99* is described below. *Standard Test Method for Determination of MTBE, ETBE,...

Fragrance Analysis Bat c h A n a l y s i s o f F r a g r a n ce C o mp o n e n ts in E sse n tia l Oil Aromatic analysis, in which large numbers of matrices are contained in the samples, is a field where MDGC analysis demonstrates its effectiveness. Combining nonpolar and polar columns enables the separation of aromatic components and impurity substances. Also, because no fatty acid esters with high boiling points are introduced into the polar column, the analysis time is reduced. 1 Fatty acid esters 1 Limonene 2 Linalool 3 Ethyl Linalool 4 Citnellol Acetate 5 Nerol 6 Cashmeran 1st Column...

Switching method Multi-Deans switching (flow channel switching based on pressure difference) Switching element Switching element subjected to deactivation processing (can be used at temperatures up to 350°C) Electronic control based on AFC Electronic control based on APC Connectable columns Capillary columns with inner diameter of 0.1 to 0.53 mm (If the detector is a GCMS, the outlet flow rate must not exceed 15 mL/min.) Column oven temperature Temperature of connected heater Connectable detectors GCMS, FID, FPD, TCD, ECD, FTD (Other detectors must be ordered specially.) Sample introduction...