Q: Technology

Agilent 990 Micro GC PRO – Continual Process Monitoring The Agilent 990 Micro GC PRO provides continual monitoring for accurate answers to control your processes. It serves many different industrial gas analysis applications including natural gas calorific value, composition, and odorants, refinery gas composition, and trace contaminants (low ppm) in industrial gas. Configurations are available with up to 4 independently controlled GC channels. Agilent 990 Mobile Micro GC – Bring the System to the Sample With the Agilent 990 Mobile Micro GC, you can analyze gas samples wherever and whenever needed. The field case contains up to 4 GC channels to provide fast, repeatable, and lab-quality results. The mobile case is equipped with batteries and gas canisters for up to 16 hours of operation.

Q: How It Works

Microelectromechanical Systems (MEMS) in the 990 Micro GC The 990 Micro GC contains a (heated) micro-machined injector, serving a variable timed loop. This allows extremely precise injection of very small sample volumes, without the need for splitting, in a compact format. The micro GC detector is a ”TCD on a chip.” It has a much smaller internal volume compared to classical thermal conductivity detectors, which negates the need for make-up gas, resulting in better sensitivities. Lower detection limits in the sub-ppm region are achievable, depending on column chemistry and compound of interest. Analyzing Liquified Gases Sampling liquified petroleum gases (LPG) or compressed hydrocarbon streams without compromising the sample composition can be challenging. The Agilent GC Gasifier sampling option vaporizes high-pressure liquified gas samples under precise pressure and temperature conditions, controlled from the 990 Micro GC as part of the analytical method. This eliminates uncontrolled expansion of the sample that would lead to sample composition changes and generates a representative gaseous sample for analysis. Backflush Columns: When Speed Matters Many columns for the 990 Micro GC can be ordered with a backflush option that uses a small length of capillary precolumn and a pressure-point style backflush. After the last component of interest elutes from the short precolumn, the rest is backflushed to vent or detector. Because columns run isothermal, there is no need to wait for full elution of heavies, column cool-down, or stabilization; the next run can start immediately. Analytical cycle times can be reduced: under two minutes is typical but closer to half a minute is possible.

Q: Applications

Natural Gas, Exploration, and Refining The 990 Micro GC is used throughout the hydrocarbon value chain. It can determine the composition of natural gas and its energy content (calorific value) according to industry standards set by ISO, ASTM, API, and GPA. It also has been used for fast gas identification and measurement during the mud logging process at drilling sites. Another common application is refinery gas analysis to quickly and accurately characterize gases produced during crude oil refining. Alternative Energy As the world moves from hydrocarbon-based fuels to alternative energy sources, the Agilent 990 Micro GC is playing a vital role. It can detect and measure hydrogen impurities that can damage fuel cells and has been used to analyze swelling gases in lithium-ion batteries that are used in electric vehicles. It also is used for the fast and efficient analysis of biogas (renewable natural gas) derived from various feedstocks, such as plant material and organic waste from sewage treatment plants or landfills. Environmental The micro GC is ideal for analyzing air for the presence of pollutants. It has been used to measure BTEX (benzene, toluene, ethylbenzene, and xylenes), which are often used as marker compounds for environmental contamination. It also can determine sulfur dioxide released from industrial manufacturing processes and hydrogen sulfide generated from geothermal hot springs.

Question 1

Features

Accepted Answer

Fast GC analysis of gas samples
Up to 4 channels of separation and detection
Micro-machined thermal conductivity detector
Compact GC has a small footprint to save bench space in the lab or fit in locations outside the lab
Helium, hydrogen, nitrogen, and argon carrier gas options
Wide range of micro GC column phases
Flexibility for lab, out-of-lab, process (in-line / at-line), and field operation
Exchange channels between lab version and mobile version
Inert sample path to address active compounds such as H2S, which can be measured at low ppm levels
Wide range of accessories, sample handling, reporting, and result exporting tools
On-board data handling for out-of-lab or process configurations
Uses only 10% of the power and carrier gas compared to a conventional lab GC
Backflush option can be used to shorten run times and protect the column by preventing exposure to unwanted compounds
Independently audited for environmental impact throughout the product lifecycle, received My Green Lab’s ACT (Accountability, Consistency, Transparency) label

Question 2

Specifications

Accepted Answer

Carrier Gas Type

Helium
Hydrogen
Nitrogen
Argon

Channels

Up to 4 independently controlled channels (injector, carrier gas, column, detector)

Detector

Micromachined TCD, dual-channel (sample and reference)

Injection Range

1-10 µL with software-selectable injection time

Injection Temperature

Up to 110 °C, including heated sample transfer line

Inlet Connection

3.2 mm (1/8 in) stainless steel compression fitting

Maximum Inlet Pressure

100 kPa (14.5 psi)

Oven Temperature

Up to 180 °C, isothermal

Peak Area Repeatability

<0.5% RSD for propane at 1 mol % level for WCOT columns at constant temperature and pressure

Sample Inlet

1.6 mm (1/16 in) stainless steel Valco fitting with replaceable 5 μm stainless steel filter

TCD Concentration Range

0.5 ppm to 100% level

TCD Linear Dynamic Range

105 (0.5 ppm to 5%), propane on a CP-Sil 5 CB channel

Typical Detection Limit

0.5 ppm for WCOT capillary columns
2 ppm for PLOT columns
10 ppm for Micropacked columns (Hayesep)
10 ppm for Micropacked columns (Carboxene)

Question 3

Technology

Accepted Answer

Agilent 990 Micro GC PRO &#8211; Continual Process Monitoring
The Agilent 990 Micro GC PRO provides continual monitoring for accurate answers to control your processes. It serves many different industrial gas analysis applications including natural gas calorific value, composition, and odorants, refinery gas composition, and trace contaminants (low ppm) in industrial gas. Configurations are available with up to 4 independently controlled GC channels.
Agilent 990 Mobile Micro GC &#8211; Bring the System to the Sample
With the Agilent 990 Mobile Micro GC, you can analyze gas samples wherever and whenever needed. The field case contains up to 4 GC channels to provide fast, repeatable, and lab-quality results. The mobile case is equipped with batteries and gas canisters for up to 16 hours of operation.

Question 4

How It Works

Accepted Answer

Microelectromechanical Systems (MEMS) in the 990 Micro GC
The 990 Micro GC contains a (heated) micro-machined injector, serving a variable timed loop. This allows extremely precise injection of very small sample volumes, without the need for splitting, in a compact format. The micro GC detector is a ”TCD on a chip.” It has a much smaller internal volume compared to classical thermal conductivity detectors, which negates the need for make-up gas, resulting in better sensitivities. Lower detection limits in the sub-ppm region are achievable, depending on column chemistry and compound of interest.
Analyzing Liquified Gases
Sampling liquified petroleum gases (LPG) or compressed hydrocarbon streams without compromising the sample composition can be challenging. The Agilent GC Gasifier sampling option vaporizes high-pressure liquified gas samples under precise pressure and temperature conditions, controlled from the 990 Micro GC as part of the analytical method. This eliminates uncontrolled expansion of the sample that would lead to sample composition changes and generates a representative gaseous sample for analysis.
Backflush Columns: When Speed Matters
Many columns for the 990 Micro GC can be ordered with a backflush option that uses a small length of capillary precolumn and a pressure-point style backflush. After the last component of interest elutes from the short precolumn, the rest is backflushed to vent or detector. Because columns run isothermal, there is no need to wait for full elution of heavies, column cool-down, or stabilization; the next run can start immediately. Analytical cycle times can be reduced: under two minutes is typical but closer to half a minute is possible.

Question 5

Applications

Accepted Answer

Natural Gas, Exploration, and Refining
The 990 Micro GC is used throughout the hydrocarbon value chain. It can determine the composition of natural gas and its energy content (calorific value) according to industry standards set by ISO, ASTM, API, and GPA. It also has been used for fast gas identification and measurement during the mud logging process at drilling sites. Another common application is refinery gas analysis to quickly and accurately characterize gases produced during crude oil refining.
Alternative Energy
As the world moves from hydrocarbon-based fuels to alternative energy sources, the Agilent 990 Micro GC is playing a vital role. It can detect and measure hydrogen impurities that can damage fuel cells and has been used to analyze swelling gases in lithium-ion batteries that are used in electric vehicles. It also is used for the fast and efficient analysis of biogas (renewable natural gas) derived from various feedstocks, such as plant material and organic waste from sewage treatment plants or landfills.
Environmental
The micro GC is ideal for analyzing air for the presence of pollutants. It has been used to measure BTEX (benzene, toluene, ethylbenzene, and xylenes), which are often used as marker compounds for environmental contamination. It also can determine sulfur dioxide released from industrial manufacturing processes and hydrogen sulfide generated from geothermal hot springs.

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Categories

Popular Keywords

Categories

990 Micro GC System

990 Micro GC System

Product Details

Agilent 990 Micro GC PRO – Continual Process Monitoring

Agilent 990 Mobile Micro GC – Bring the System to the Sample

Microelectromechanical Systems (MEMS) in the 990 Micro GC

Analyzing Liquified Gases

Backflush Columns: When Speed Matters

Natural Gas, Exploration, and Refining

Alternative Energy

Environmental

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Carrier Gas Type	Helium Hydrogen Nitrogen Argon
Channels	Up to 4 independently controlled channels (injector, carrier gas, column, detector)
Detector	Micromachined TCD, dual-channel (sample and reference)
Injection Range	1-10 µL with software-selectable injection time
Injection Temperature	Up to 110 °C, including heated sample transfer line
Inlet Connection	3.2 mm (1/8 in) stainless steel compression fitting
Maximum Inlet Pressure	100 kPa (14.5 psi)
Oven Temperature	Up to 180 °C, isothermal
Peak Area Repeatability	<0.5% RSD for propane at 1 mol % level for WCOT columns at constant temperature and pressure
Sample Inlet	1.6 mm (1/16 in) stainless steel Valco fitting with replaceable 5 μm stainless steel filter
TCD Concentration Range	0.5 ppm to 100% level
TCD Linear Dynamic Range	10⁵ (0.5 ppm to 5%), propane on a CP-Sil 5 CB channel
Typical Detection Limit	0.5 ppm for WCOT capillary columns 2 ppm for PLOT columns 10 ppm for Micropacked columns (Hayesep) 10 ppm for Micropacked columns (Carboxene)