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The main application of the STA/TG-G-MS combined system is the detection, separation, and analysis of organic components.
Gas chromatography (GC) is a high-resolution analytical technique used to separate volatile and semi volatile products. Gas mixtures are effectively separated based on the difference in component distribution between the static phase (such as the internal coating of capillaries) and the mobile phase (blowing gas, such as He). Due to the time required for gas separation in the chromatographic column (which depends on sample characteristics, column flow rate, column length, and static and mobile phases), it is not possible to directly connect a continuous online sample gas stream to the GC.
Our solution is to develop a direct combination of quasi continuous mode using a heated automatic valve, allowing software controlled gaseous injection (flow through injection cycle) and short interval gas injection.
Our cooperative brand is the world-renowned GC-MS supplier Agilent and Jeol. They provided comprehensive GC-MS supply and service quality that fully met Netzsch's expectations. This ensures the optimal performance of our combined system.
Our solution is to develop a direct combination of quasi continuous mode using a heated automatic valve, allowing software controlled gaseous injection (flow through injection cycle) and short interval gas injection.
Our cooperative brand is the world-renowned GC-MS supplier Agilent and Jeol. They provided comprehensive GC-MS supply and service quality that fully met Netzsch's expectations. This ensures the optimal performance of our combined system.
Analyze the composition of additives, stabilizers, and solvents in the following areas:
① Food②medicine③Cosmetics④polymer⑤biomass
① Food②medicine③Cosmetics④polymer⑤biomass
GC-MS measurement can obtain the following information:
①Separation of complex gaseous mixtures②Gas composition detection and identification③Component analysis④Gas-solid reaction⑤Decomposition product ⑥ Thermal cracking gas⑦Combustion products⑧Identification of flue gas⑨Identification of additives (such as plasticizers)
①Separation of complex gaseous mixtures②Gas composition detection and identification③Component analysis④Gas-solid reaction⑤Decomposition product ⑥ Thermal cracking gas⑦Combustion products⑧Identification of flue gas⑨Identification of additives (such as plasticizers)
STA/TG-G-MS - Technical Characteristics
TG/STA - GCMS
Unique TG/STA-GC-MS combination solution.
A fully heated gas transfer tube (300 ° C) connecting the six way valve and injector of TG/STA and GC.
Glass lined steel pipes are pumped to allow gaseous products to flow through the gas ring.
TG/STA - GCMS
Unique TG/STA-GC-MS combination solution.
A fully heated gas transfer tube (300 ° C) connecting the six way valve and injector of TG/STA and GC.
Glass lined steel pipes are pumped to allow gaseous products to flow through the gas ring.
Gas injection based on valve box
Dual loop system, supporting short injection intervals
• Software operation integrated into Proteus ® in
Special insulation design to maintain a constant temperature of 300 ° C to avoid cold spots
• Independent injection system (not conflicting with standard injection system, which can be used for routine liquid injection)
• Allow chromatographic columns to be short circuited for direct MS coupling
Dual loop system, supporting short injection intervals
• Software operation integrated into Proteus ® in
Special insulation design to maintain a constant temperature of 300 ° C to avoid cold spots
• Independent injection system (not conflicting with standard injection system, which can be used for routine liquid injection)
• Allow chromatographic columns to be short circuited for direct MS coupling
Gas chromatography (GC)
• Quickly replace chromatography column without emptying MS
• Provide multiple types of chromatography columns for special applications
• Split, no split, pulse split
The GC column box can reach a maximum temperature of 450 ° C
• Quickly replace chromatography column without emptying MS
• Provide multiple types of chromatography columns for special applications
• Split, no split, pulse split
The GC column box can reach a maximum temperature of 450 ° C
Mass spectrometry (MS)
High performance MS with a mass to charge ratio range of 1.5 u 1022 u
High speed injection rate, up to 22.222 u/s at the fastest
Maintenance can be carried out without the need for tools. For example, simplified ion source maintenance without the need for any tools
Multiple ionization modes (optional including EI, PI, CI, etc.)
• Individual MS measurement
High performance MS with a mass to charge ratio range of 1.5 u 1022 u
High speed injection rate, up to 22.222 u/s at the fastest
Maintenance can be carried out without the need for tools. For example, simplified ion source maintenance without the need for any tools
Multiple ionization modes (optional including EI, PI, CI, etc.)
• Individual MS measurement
Examples of STA/TG-G-MS Applications
The main purpose of TG-GC-MS combination is to detect, separate, and analyze organic components. Detailed gas analysis can also be conducted using GC-MS in combination to further investigate the thermal cracking processes of organic matter, biomass, reusable solid fuels, carbon materials, and polymers under controlled temperature programs in TG/STA. Thus, it is possible to measure the gaseous products released during combustion of samples at different oxygen contents with high sensitivity and resolution.
With the highly sensitive gas detection and identification capabilities of GC-MS, it is possible to effectively analyze residual solvents in additives, stabilizers, as well as food, pharmaceuticals, cosmetics, and polymers.
Decomposition of natural rubber
The following figure shows the TG-DTG-TIC diagram of uncured natural rubber (NR). 3.36 mg， N2， Inject the escaping gas continuously at 1-minute intervals. Maintain a constant high temperature in the GC column to allow the gas mixture to quickly pass through and effectively separate its main components.
The main purpose of TG-GC-MS combination is to detect, separate, and analyze organic components. Detailed gas analysis can also be conducted using GC-MS in combination to further investigate the thermal cracking processes of organic matter, biomass, reusable solid fuels, carbon materials, and polymers under controlled temperature programs in TG/STA. Thus, it is possible to measure the gaseous products released during combustion of samples at different oxygen contents with high sensitivity and resolution.
With the highly sensitive gas detection and identification capabilities of GC-MS, it is possible to effectively analyze residual solvents in additives, stabilizers, as well as food, pharmaceuticals, cosmetics, and polymers.
Decomposition of natural rubber
The following figure shows the TG-DTG-TIC diagram of uncured natural rubber (NR). 3.36 mg， N2， Inject the escaping gas continuously at 1-minute intervals. Maintain a constant high temperature in the GC column to allow the gas mixture to quickly pass through and effectively separate its main components.
At the starting point of NR decomposition (32 min, 346.3 ° C), the main volatile products are isoprene C5H8 (peak 1 of TIC chromatogram) and 1-methyl-4- (1-methylethenyl) - cyclohexene C10H16 (peak 2).
In continuous GC-MS mode, the relationship between gas volatilization and temperature/time was displayed. You can choose a separate mass number (m/z) to continuously plot the temperature (single ion monitoring, SIM)
The second stage of NR decomposition (starting at 38 min, 406.2 ° C) showed the release process of products other than isoprene and substituted cyclohexexene. Through analysis, it is found that these gas products include: 5,5-dimethyl-1,3-cyclopentadiene (C7H10, 94 m/z), 1-methylene-2-vinylcyclopentane (C8H12, 108 m/z), and beta humulene (C15H24, 204 m/z).
Thermal cracking of oak wood
The following figure shows the TG-DTG-T plot of oak wood, with 4.37 mg, N2, and GC-MS event driven triggering at 291 ° C and 347 ° C (DTG threshold 8%/min); Stop heating during GC-MS operation. The gas products were analyzed in detail using the following GC furnace program: isothermal at 60 ° C for 0.5 minutes, and linearly heated to 310 ° C at 25K/min.
The total ion chromatogram of the first stage of oak wood pyrolysis process and the spectral library search results of the relevant main peaks are as follows (the table below is arranged in ascending order of retention time (RT/min)):
The total ion chromatogram of the second stage of oak wood pyrolysis process and the spectral library search results of the relevant main peaks are as follows (the table below is arranged in ascending order of retention time (RT/min)):
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