GS-Tek provides solution-based turnkey GC analyzers, sample preparation devices, and application-specific gas chromatography solutions for laboratories that need reliable methods, practical configurations, and long-term analytical performance.
Solution-Based Turnkey GC Analyzers
Solution-based turnkey analyzers are an important part of practical gas chromatography. These systems may follow established methods, such as natural gas analysis (NGA), liquid petroleum gas analysis (LPGA), refinery gas analysis (RGA), greenhouse gas analysis (GGA), and simulated distillation (SimDis), or they may be customized for chemical-process monitoring and environmental testing. Reliable analyzer design depends on a clear understanding of the test method, the customer’s sample matrix, long-term column performance, sample-introduction requirements, and instrument configuration. A robust analyzer starts with the right column selection and a method that is accurate, reproducible, and practical to maintain.
With experience in GC column technology, sample preparation, sample introduction, separation chemistry, instrumentation, and data analysis, GS-Tek offers standard and customized solution-based turnkey analyzers. Examples include an extended natural gas analyzer up to C16 in less than 40 minutes, low-level moisture analysis in chemical streams, analyzers for in-process acrylate reactions and alkaline oxides, low-level formaldehyde or oxides in ambient air, and CO2 conversion research.
GS-Tek offers the following analyzer configurations for the corresponding standard methods and application requirements.
In addition to the standard analyzer configurations listed above, GS-Tek is interested in collaboration opportunities for challenging applications. Sample handling is often the key issue. GS-Tek has developed techniques to partition gas-liquid mixture samples under high-temperature and high-pressure conditions to simplify chromatographic analysis and improve measurement reliability for chemical-process samples. GS-Tek has also developed practical approaches for measuring impurities in high-purity gases used in new energy research, semiconductor manufacturing, and environmental monitoring, including H2S, CO/CO2, AsH3, PH3, Cl2, HF, ethylene oxide, noble gases, and related compounds. Please share your application needs by emailing info@gs-tek.com.
GS-Tek can also provide a second opinion for customers working on solution-based analyzers. Our column and application experience can help with troubleshooting, repair, calibration, method updates, and improvement of existing analyzer systems.
Sample Preparation Devices
Automatic Solid Phase Extraction Device
This automatic device is designed primarily for aqueous sample extraction. Key features include:
- Sample volumes in the range of 20 to 1000ml
- Touch screen control and SPE method configuration
- Up to five solvents can be selected for solid phase extraction processing
- Column extraction and disk extraction modes can be carried out simultaneously
- Six extraction channels for simultaneous extraction of up to six samples
- Collection bottle holders available in four different sizes
Specifications
| Weight | 60kg |
| Dimensions (h * w * d) | 57 x 64 x 69cm |
| Sample Rack | 6, 250ml or 1liter |
| Collecting rack | 6, 15ml |
| Voltage | 100-240VAC |
| Power | 150VA |
| Extraction vol | 3, 6, 12ml |
| Pump | Ceramic wetting surface pump, FMI |
| Flow/channel | 1-30ml/min |
| Liquid pump Pressure | 45psi |
| Purge Gas connection | air/nitrogen |
| Sample quantity | 6 |
| SPE Protocol | Activation, loading, washing, elution, drying |
Nitrogen Evaporator
A nitrogen evaporator uses nitrogen purging and controlled heating to remove excess solvent from liquid samples. This increases the concentration of target components and prepares the sample for analysis or further processing.
Nitrogen evaporators are widely used in environmental and biological sample preparation workflows.
Total Solution for Hot Stream Sample Analysis
Real-time monitoring changes of a hot stream composition in a chemical reaction process is very critical for both reaction process control and safety of the reaction device. An example is acrylic acid reaction. The oxygen level is used to detect completion of the reaction. Excessive high aldehyde level may cause exposition of this reaction device.
The major components of a hot stream are air, moisture and raw reactant materials such as butenes, methanol. The content levels of oxygen from air and reactant material are changed over reaction time from high level (percentage) to ppm level (completion of reaction). A hot stream temperature is usually above 100 Degree C, the pressure of the hot stream is slightly above ambient pressure. The reactant(s) are very viscous and prone to polymerization or dimerization when a locally concentrating occurs from changes of stream temperature, flow area, or pressure. When a hot stream sample is taken from process, both the temperature change from handling and duration of the sample transportation to analysis may not able to produce correct real time data. All the level change, physio-chem property, and reactivity cause challenges for in-line monitoring and analysis.
GS-Tek develops a total solution for analyzing hot stream samples to give a real time result. The key technology of this total solution is an in-line sampling device. This sampling device is to isolate gaseous phases from liquid phases (moisture, raw material, reactant products, and final product) with a measureable sample mass and volume of the gaseous phase. Both gaseous sample and liquid sample will be analyzed on an off-line gas chromatograph analyzer to produce a complete result of gases and liquid components. This sampling device is easy to operate in-line, both gaseous phase and liquid phases sample can be easily and safely transported to lab for analysis.
This total solution of hot stream sampling, isolation and gas chromatography-based analyzer has been successfully used in a few chemical processes of methyl acrylic acid and acrylic acid for multiple years. This total solution can be extended with minor customizations to other chemical reaction processes, and researches in environmental, combustion, coal chemical process, new catalyst development.
Contact info@gs-tek.com for application details or custom project discussion.
Gas Flow Controller
GS-Tek develops compact electronic gas flow controllers for inert gas flow from 0 to 500 mL/min. These controllers can be used for instrument control and sample preparation workflows, including online sample dilution. For inquiries, contact info@gs-tek.com.