Computer Interface Gas Chromatographs
Description
Computer Interface Gas Chromatographs are sophisticated analytical instruments designed to separate and analyze compounds in a gas sample. They consist of several key components, including a flowing mobile phase, an injection port, a separation column with a stationary phase, and a detector. These devices are equipped with a computer interface that allows for enhanced data processing, storage, and communication capabilities, enabling users to efficiently manage and interpret the chromatographic data.
Working Principle
Gas chromatographs operate by injecting a gas sample into a stream of carrier gas, which transports the sample through a separation column. The column contains a stationary phase that interacts with the sample components, causing them to separate based on their partitioning behavior between the mobile and stationary phases. Detectors then measure the concentration of each component as they elute from the column. The data is processed by a controller, which generates a chromatogram and calculates the concentrations of individual components. The computer interface facilitates communication with external systems, allowing for real-time data analysis and reporting.
Applications
Gas chromatographs with computer interfaces are used in a wide range of applications. They are employed in the analysis of agricultural chemicals and pesticides, cosmetics and fragrances, drugs and pharmaceuticals, and environmental monitoring. In the energy sector, they are used for natural gas analysis, including the separation of components like hexanes and heavier hydrocarbons. These instruments are also crucial in forensic analysis, food and beverage processing, and the quality control of industrial gases.
Advantages over other Gas Chromatographs
Computer Interface Gas Chromatographs offer several advantages over traditional models. The integration of a computer interface allows for more sophisticated data analysis and storage capabilities. This feature enables users to perform complex calculations and generate detailed reports, which are essential for applications requiring high precision and accuracy. Additionally, the ability to communicate with external systems through serial or discrete outputs enhances the versatility and functionality of these instruments.
Limitations
One of the primary limitations of gas chromatographs is the requirement for samples to be volatile at the column operating temperature. This restricts the types of samples that can be analyzed. Additionally, the sample handling system must ensure that the sample is clean and dry, as the presence of solids or liquids can interfere with the analysis. The complexity of the system may also require specialized training for operators to ensure accurate and reliable results.
Considerations
When considering the purchase and operation of a Computer Interface Gas Chromatograph, several factors should be taken into account. Initial costs can be significant, given the advanced technology and capabilities of these instruments. Operating expenses may include the cost of carrier gases, maintenance of the sample handling system, and periodic calibration. Durability and accuracy are critical, as these instruments are often used in demanding environments where precision is paramount. Replacement and maintenance costs should also be considered, as regular servicing is necessary to maintain optimal performance.
from ABB Measurement & Analytics
The PGC1000 is a field-mount gas chromatograph (GC) capable of measurements of C1 through C9+, inerts and H2S in various Hydrocarbon Processing Industry (HPI) streams. This analyzer is perfect for measuring light hydrocarbon gases in locations where minimal space is available. The PGC1000 is an... [See More]
- Instrument Type: Fixtured
- Oven Operation: Oven
- Application: Energy
- Detector: Thermal Conductivity Detector
from COSA Xentaur Corporation
The COSA Portable BTU Gas Chromatograph is ideal for C6+ analysis of natural gas. The COSA Portable BTU Gas Chromatograph publishes 20 derived parameters, such as Calorific Value, Wobbe Index, Specific Gravity, Copressibility, Ratio of Heats, Gas Density, Real Gross Heat Value, and more.... The unit... [See More]
- Instrument Type: Portable
- Inlet Pressure Range: 7 to 70
- Application: Energy; Industrial Gases
- Remote Interface: Computer Interface; Serial communication protocol such as RS-232, RS-485, USB.; Application Software Included.
from O. I. Analytical
Optional discrete purging multisampler available for automated analyses [See More]
- Instrument Type: Fixtured
- Carrier Gas Text: He, H2
- Application: Industrial Gases; Petroleum
- Detector: Flame Ionization Detector; Photo Ionization Detector
from Malvern Instruments, Inc.
Designed specifically for the characterization of polyolefins, but with the ability to handle other polymers, such as polythiophene PEEK and PVF, the Viscotek High Temperature GPC (HT-GPC) system brings advanced triple detector technology to these demanding applications. The HT-GPC operates up to... [See More]
- Instrument Type: Fixtured
- Oven Operation: Oven; Temperature Programmable
- Application: Plastics / Polymers / Rubber
- Oven Temperature Range: 86 to 338
from Emerson Automation Solutions – Rosemount
The 1500XA Process Gas Chromatograph combines the proven analytical components of the field-mounted GCs with the larger oven capacity of a traditional air-bath oven design. The result is maximum analyzer reliability and analytical flexibility in one package. The Rosemount Analytical 1500XA Gas... [See More]
- Instrument Type: Fixtured
- Oven Operation: Oven
- Application: Environmental; Industrial Gases; Refineries, Petrochemical, Gas Processing, Power Generation
- Oven Temperature Range: 302
from Shimadzu Scientific Instruments, Inc.
Realize dramatic improvements in productivity with the GC-2010 Plus. Out of the box, it's ready to perform high-speed GC utilizing the latest in ultra narrow-bore capillary columns. The fourth generation Advanced Flow Controller delivers up to 1200 ml/min, 140 psi of pressure and supports split... [See More]
- Instrument Type: Fixtured
- Oven Operation: Oven; Temperature Programmable
- Application: Cosmetics / Fragrances; Industrial Gases; Organic Chemicals; Thermal Decomposition
- Oven Temperature Range: 122 to 536
from FIS Inc.
Three major halitosis components are hydrogen sulfide, methyl mercaptan, and dimethyl sulfide. The OralChroma measures Volatile Sulfide Components (VSC) in the breath and separates them into the above three components. About 1000 sets of OralChroma have been supplied to dentists, universities, and... [See More]
- Instrument Type: Portable
- Oven Temperature Range: 50 to 86
- Application: Environmental; Medical / Biological
- Injection Method: Syringe Injection
from Siemens Analytical Products
This process gas chromatograph, which has resulted from decades of international experience and technology development, leads the industry in capability, flexibility and reliability. The Maxum edition II is used in all branches of the fine chemicals, refining and hydrocarbon processing industries. [See More]
- Instrument Type: Fixtured
- Oven Operation: Isothermal
- Application: Industrial Gases
- Oven Temperature Range: 140 to 536
from Emerson Automation Solutions – Rosemount
The Danalyzer 370XA Gas Chromatograph from Emerson Process Management is the latest analyzer to join the XA Series of Rosemount Analytical gas chromatographs. The 370XA is designed to simplify natural gas measurement analysis in Fiscal and Custody Transfer applications and improve the measurement... [See More]
- Instrument Type: Fixtured
- Oven Operation: Isothermal
- Application: Environmental; Industrial Gases; Natural Gas Applications: Custody Transfer, Production Gas Measurement, Power Generation, Gas Burner Management
- Oven Temperature Range: -4 to 140
from Shimadzu Scientific Instruments, Inc.
Shimadzu's versatile GC-2014 gas chromatograph offers exceptional performance, value, and ease of use. Ideal for routine analysis in the R&D lab or industrial setting, the GC-2014 utilizes the high-end technology of the GC-2010 Plus to cover a wide range of applications from capillary to packed... [See More]
- Instrument Type: Fixtured
- Oven Operation: Oven; Temperature Programmable
- Application: Industrial Gases; Petroleum
- Oven Temperature Range: 44.6 to 752
from FIS Inc.
Sensor Gas Chromatograph (SGC) uses a highly sensitive semiconductor gas sensor as a gas detector. The original built-in column is small, enabling the sample gases to be very sensitive and quick separation. [See More]
- Instrument Type: Portable
- Oven Temperature Range: 50 to 86
- Application: Environmental; Medical / Biological
- Injection Method: Syringe Injection