DPS Environmental GC Systems - Application Notes


    Each of these Environmental Applications can be analyzed using one, or more of the Custom GC configurations of the Series 600 Lab GC. However, the vast majority can also be analyzed using the Companion 1, or the Companion 2 Portable GC Systems.  Above all, each of these Custom GC Systems gives the same great results. So, whether your analyzing in the Lab, or in the factory, or out in the field, you can rest easy knowing that your Environmental results will always be consistent.

Air Analyzers

     When you need the lowest level air analyses possible count on the Air Analyzers from DPS Instruments. All of our Air Analyzers include detectors tuned to their highest sensitivity and the largest dynamic range. For your convenience, we build the Air Concentrator right into the system. We include an electronically controlled vacuum pump with a flow controller for precise and reproducible air sampling, a microelectronic sampling valve, and an adsorbent trap. The Series 600 GC is ideal for analyses in the lab, or use the Portable Companion 2 GC Systems for analyses right where the samples are taken. Common configurations include a FID for hydrocarbons, PID for aromatics such as Benzene, and the ultra-sensitive BCD for chlorinated compounds. A combination of detectors covers most environmental methods. The fast heating and rapid cooling column oven in every DPS GC vastly increases your sample throughput. Fully integrated Air GC Analyzer Systems are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Benzene
Light Hydrocarbons
Chlorinated Solvents
BTEX Compounds
Alkanes
Alkenes
Alcohols
Aldehydes
Ketones
etc.

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Diesel Range Organics

     Diesel has been used for heating homes and as a fuel for trucks and engines for over 100 years. Diesel is not environmentally friendly when it leaks out of holding tanks and seeps into the soil and subsequent groundwater. Modern double layer tanks have a built-in second containment system to handle leaks and these have been installed underground in many areas. However, many older tanks are still in existence and these are prone to leaks causing local contamination and the need for thousands of sample analyses per year. For your convenience, DPS has configured the Diesel Range Organics Analyzers to help you define the extent of the contaminant plume as well as assist you in determining the age of the spill. A sensitive FID detector is ideal for identifying the hydrocarbon backbone found in Diesel and the fast heating and rapid cooling column oven in every DPS GC vastly increases your sample throughput. The fully integrated Diesel Range Organics GC Analyzer Systems are small, lightweight, and rugged to go where ever you need them. All Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
C12- C20 Hydrocarbons
Aromatics
Parafins
Naphthenes

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Disinfection By-products

     We all want clean water to drink for ourselves and our kids. The lakes, streams, springs, and wells that are the source of our drinking water have naturally occurring organic compounds from plant decomposition and contaminants from man made sources. When distribution companies and water treatment plants add chlorine or other disinfectants to purify the water, disinfection by-products are formed that can be harmful to human health. The most common of these are Trihalomethanes, such as Chloroform. However, Haloacetic Acids, Chlorophenols, and other chlorinated and brominated compounds can be formed. Water companies go to great lengths to reduce the concentrations of these harmful by-products, but they are always present. The Disinfection By-products GC Analyzers from DPS use the nonradioactive BCD detector to identify these by-products in the low part per billion (ppb) range. Fully integrated Disinfection By-products GC Analyzer Systems are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Chloroform
1,1,1-Trichloroethane
Carbon Tetrachloride
Trichloroacetonitrile
Trichloroethylene
Bromodichloromethane
Chloral Hydrate
Dichloroacetonitrile
1,1-Dichloro-2-Propanone
1,1,2-Trichloroethane
Chloropicrin
Dibromochloromethane
1,2-Dibromomethane
Tetrachloroethylene
Bromodichloroacetonitrile
1,1,1-Trichloro-2-Propanone
Bromoform
Dibromoacetonitrile
1,2,3-Trichloropropane
4-Bromofluorobenzene
1,2-Dibromo-3-Cloropropane

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Environmental Pollutants

     Some of the millions of gallons of chlorinated solvents used in industry over the years have spilled, polluting our air, soil, rivers, lakes, streams, and ground water. Environmentally conscious legislation has been passed in many parts of the world to limit future spills, clean up existing polluted sites, and lessen the overall risk to ourselves and to our children. DPS has configured a full range Environmental GC analyzers to assist in the detection of common pollutants. All of these Environmental GC Systems allow direct injection of sample extracts. However, We have also added a built-in Air Concentrator and Purge & Trap for low ppb level analysis of air, water, or soil samples all in one GC. The Series 600 GC is for analyses in the lab, or the Portable Companion 2 GC Systems are for analyses right where the samples are taken. The FID detector is sensitive to hydrocarbons, which can assist in defining the source of the pollutant, the PID is very sensitive to aromatics such as Benzene, and the BCD is ultra-sensitive to chlorinated compounds. A combination of detectors covers most environmental methods. All Environmental DPS GC systems are small, lightweight and modular for expandability, upgrades, and easy service.
Example Compounds:
Chlorinated Solvents
BTEX Compounds
Alkanes
Alkenes
Alcohols
Brominated Compounds
Aldehydes
etc.

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Explosives

     Since the Chinese first mixed gun powder, people have been devising ways of harnessing it’s power to move mountains in the name of progress, or to keep enemies at bay. For more than a century many parts of the world have been littered with un-exploded ordinances. Bombs, shells, and land mines create a current and future threat to ourselves and our kids. DPS has configured the Explosives Analyzers to identify the nature and type of explosive. We have specifically designed the portable and rugged Companion 1 GC to help detect explosives in the field. The sensitive TID detector is ideal for identifying the nitrosamines and nitro-aromatic compounds responsible for the deadly nature of the ordinances. The fast heating and rapid cooling column oven in every DPS GC vastly increases your sample throughput. Fully integrated Explosives GC Analyzer Systems are small, lightweight, and rugged to go where ever you need them. All Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
2,6-Dinitrotoluene
1,3-Dinitrobenzene
2,4-Dinitrotoluene
1,3,5-Trinitrobenzene
2,4,6-Trinitrotoluene
Hexahydro-trinitro-triazine
4-Amino-4,6-dinitrotoluene
2-Amino-2,6-dinitrotoluene
Trinitrophenylmethylnitramine
Octahydro-tetranitro-tetrotzocine

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Fast BTEX

     When you need speedy BTEX (Benzene, Toluene, Ethylbenzene, and Xylenes) analyses to satisfy your clients choose one of our full range of BTEX Analyzers. We offer both Series 600 Lab GC’s and Companion Portable GC’s configured for Direct Injection for your extracts, or gas samples. For the automated analysis of gas samples, choose the Gas Sample Valve option. The integrated Sample loop is either filled using a sample bag, or an electronically controlled vacuum pump can automatically draw the sample through the Sample Loop for highly precise and reproducible analyses. All of the BTEX Analyzers are fully integrated GC Systems that are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Benzene
Trichloroethylene
Toluene
Tetrachloroethylene
Ethylbenzene
O, M & P Xylenes

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Gasoline Range Organics & BTEX

     When you need speedy BTEX (Benzene, Toluene, Ethylbenzene, and Xylenes) analyses to satisfy your clients choose one of our full range of BTEX Analyzers. We offer both Series 600 Lab GC’s and Companion Portable GC’s configured for Direct Injection of your extracts. For the analysis of BTEX in water samples choose the Purge & Trap BTEX Analyzers with compound sensitivities in the low part per billion (ppb) range. The integrated Purge & Trap is built right into the Series 600, or Companion chassis, so there is no need for a bulky heated transfer line. In some areas of the world the preferred method involves concentrating a soil gas sample on an absorbent trap. We have designed the Soil Gas BTEX Analyzers for this application. For your convenience, we build the Air Concentrator right in, which includes an electronically controlled vacuum pump with a flow controller for precise and reproducible air sampling. In other parts of the world the soil sample is placed in a vial, heated, and then a portion of the headspace is injected into the GC. We have configured the Headspace BTEX Analyzers for this method. All of the BTEX Analyzers are fully integrated GC Systems that are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
C4 – C12 Hydrocarbons
Benzene
Trichloroethylene
Toluene
Tetrachloroethylene
Ethylbenzene
O, M & P Xylenes

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Greenhouse Gases

     The earth has been naturally warming since the last ice age, however due to man’s influence the warming process has significantly accelerated since the industrial revolution. Burning of fossil fuels, coal, and wood has increased carbon dioxide, carbon monoxide, and methane concentrations in the atmosphere. These Greenhouse gases hold in infrared radiation, which would normally escape, and warm the lower atmosphere. DPS Greenhouse Gas GC Analyzers are small, lightweight and well suited for monitoring ambient air, gases from stacks, atmospheric air, or use it anywhere you need to measure emissions. The Greenhouse configuration includes a sensitive FID detector with Methanizer for measuring methane, carbon dioxide and carbon monoxide. Samples are automatically loaded with the built-in vacuum pump and injected onto the latest designed capillary column with the gas sample valve. Let’s all do our part to help lower the amount of Greenhouse gases released into the atmosphere; our kids and grand kids will appreciate that we did. The Greenhouse Gas GC Analyzers are fully integrated GC Systems that are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Carbon Monoxide
Methane
Carbon Dioxide

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Nitrogen/Phosphorus Pesticides

     Nitrogen and Phosphorus containing pesticides, such as Diazinon have been produced extensively for decades for use in agriculture. Although production and use are decreasing in many countries, we know that widespread occupational exposure to Nitrogen/Phosphorus Pesticides have occurred during their production, formulation, application and disposal. It has been well documented that these chemicals cause nerve damage in humans and food from many countries may still be contaminated. We configure the DPS Nitrogen/Phosphorus Pesticides GC Analyzers using the selective NPD detector to identify these pesticides in food and other products. The fast heating and rapid cooling column oven in every DPS GC vastly increases your sample throughput. Fully integrated Nitrogen/Phosphorus Pesticides GC Analyzer Systems are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Dichlorvos
Mevinphos
Ethoprop
Naled
Phorate
Demeton-S
Diazinon
Disulfoton
Methyl Parathion
Ronnel
Fenthion
Chlorpyrofos
Trichloronate
Merphos
Prothiophos
Fensulfothion
Sulprofos
Azinphos-methyl

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Organochlorine Pesticides

     Organochlorine pesticides, such as DDT, have a long history of widespread use around the world. These compounds have been used as insecticides since the 1940’s are typically very persistent in the environment, and are known for accumulating in sediments, plants and animals. Organochlorine pesticides have a wide range of both acute and chronic health effects, including cancer, neurological damage, and birth defects. We configure the DPS Pesticides GC Analyzers using the nonradioactive BCD detector to identify these pesticides in food and other products in the part per billion (ppb) range. The BCD requires only helium to operate. The fast heating and rapid cooling column oven in every DPS GC vastly increases your sample throughput and adding a second column and detector allows you to perform primary and conformational analyses with one injection. Fully integrated Pesticides GC Analyzer systems are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
a-BHC
g-BHC
b-BHC
d-BHC
Heptachlor
Aldrin
Heptachlor Epoxide
Chlordane
Endosulfan I
4,4,-DDE
Dieldrin
Endrin
4,4,-DDD
4,4,-DDT
Endosulfan Sulfate
Methoxychlor
Endrin Ketone

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Organophosphorus Pesticides

     Hundreds of millions of pounds of organophosphorus pesticides are used around the world each year. These pesticides work by interfering with the nervous system of insects; the same mechanism also affects the human nervous system when people are exposed. The health effects of individual organophosphorus pesticides vary; some are highly acutely toxic, some cause development or reproductive harm, and some are known or suspected endocrine disrupters. These compounds are great for killing bugs, but they are also harming our kids. We configure the DPS Organophosphorus Pesticides GC Analyzers using the phosphorus specific FPD detector to identify these pesticides in food and other products. The fast heating and rapid cooling column oven in every DPS GC vastly increases your sample throughput. Fully integrated Organophosphorus Pesticides GC Analyzer systems are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Dichlorovos
Mevinphos
Dimeton-O
Ethoprop
Naled
Phorate
Demeton-S
Diazinon
Disulfoton
Methyl Parathion
Ronnel
Fenthion
Chlorpyrofos
Trichloronate
Merphos
Prothiophos
Fensulfothion
Sulprofos
Azinphos-methyl

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Phthalates

     Phthalates are used in a large variety of products, from coatings of pharmaceutical pills to viscosity control agents, gelling agents, film formers, stabilizers, dispersants, lubricants, binders, emulsifying agents, and suspending agents. They are also found in adhesives and glues, building materials, personal-care products, medical devices, detergents, packaging, children’s toys, modelling clay, waxes, paints and coatings, pharmaceuticals, food products, and textiles. Phthalates are moreover frequently used to soften Polyvinyl Chloride (PVC). Since the phthalate does not form a molecular bond with the plastic it can be removed with heat, or organic solvents creating a potential environmental risk. DPS configures the Phthalates GC Analyzers with the sensitive FID detector to identify Phthalates in these common products, or the environment. The fast heating and rapid cooling column oven in every DPS GC vastly increases your sample throughput. The fully integrated Phthalates GC Analyzer systems are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Dimethyl Phthalate
Diethyl Phthalate
Diisobutyl Phthtalate
Di-n-Butyl Phthalate
Bis(methoxyethyl) Phthalate
Bis(4-methyl-2-pentyl) Phthalate
Bis(ethoxyethyl) Phthalate
Diamyl Phthalate
Hexyl-2-Ethylhexyl Phthalate
Di-n-Hexyl Phthalate
Butyl Benzyl Phhalate
Bis(2-n-Butoxyethyl) Phthalate
Dicyclohexyl Phthalate
Bis(2-Ethylhexyl) Phthalate
Di-n-Octyl Phthalate
Dinonyl Phthalate
Bis(2-n-Butoxyethyl) Phthalate
Dicyclohexyl Phthalate
Bis(2-Ethylhexyl) Phthalate
Di-n-Octyl Phthalate
Dinonyl Phthalate

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Polychlorinated Biphenyls - PCB’s

     Polychlorinated biphenyls (PCB’s) are synthetic chemical compounds that are relatively fire-resistant, very stable, and do not conduct electricity. These properties have made them desirable components in a wide range of industrial and consumer products for the past 80 years. Unfortunately, PCB’s have been routinely disposed of over the years, without any precautions being taken. As a result, large volumes of PCB’s have been introduced into the environment through open burning, vaporization from paints and plastics, by dumping into sewers and streams, and by dumping into the oceans. Many of the PCB’s dumped years ago are still around today because of their extreme resistance to chemical and biological breakdown. We have designed the DPS PCB’s GC Analyzers to help clean up this mess. The nonradioactive BCD Detector can detect and identify the specific PCB contamination quickly. The fully integrated PCB’s GC Analyzer systems are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Archlor-1016
Archlor-1221
Archlor-1232
Archlor-1242
Archlor-1248
Archlor-1254
Archlor-1260
etc.

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Semi-Volatiles

     Semi-volatiles is a catch all phrase for many classes of higher boiling organic compounds. These can be Polynuclear Aromatics, Phenols, Phthalate Esters, Nitrosamines, Chlorinated Hydrocarbons, and others. Since everyone is looking for lower detection limits, these compounds are usually extracted, concentrated and shot by direct injection. The common link between these compounds is their hydrocarbon backbone, which can be easily detected by the FID detector. DPS configures the Semi-volatiles GC Analyzers with the sensitive FID detector and the column of your choice to separate and identify these classes of compounds. Or, let our experts assist you in selecting a good general purpose column to cover most of the applications. The fast heating and rapid cooling column oven in every DPS GC vastly increases your sample throughput. The fully integrated Semi-volatiles GC Analyzer systems are small and lightweight and all Environmental DPS systems are modular for expandability, upgrades, and easy service.
Example Compounds:
Naphthalene
Acenaphthylene
Acenaphthene
Fluorene
Phenanthrene
Anthracene
Fluoranthene
Pyrene
Benzo(a)anthracene
Chrysene
Benzo(b)fluoranthene
Benzo(k)fluoranthene
Benzo(a)pyrene
Indeno(1,2,3-cd)pyrene
Dibenzo(a,h)anthracene
Benzo(ghi)perylene

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Soil Gas

     Millions of liters of chlorinated solvents used in industry over the years have spilled, polluting our air, soil, rivers, lakes, and streams. Environmentally conscious legislation has been passed in many parts of the world to limit future spills, clean up existing polluted sites, and lessen the overall risk to ourselves and to our children. Looking towards a greener world, DPS has configured a Companion 2 Portable Soil Gas GC Analyzer, enabling analysis in the field for Type 1 hazardous substances (11 compounds) specified in the Soil Contamination Countermeasures Law in Japan. The DPS Soil Gas GC has a built-in Sample Concentrator with Trap and dry purge functions for low ppb level analysis of these 11 compounds, and the newly added compound, Chloroethylene. The PID is very sensitive to aromatics and alkenes, and the BCD is ultra-sensitive to chlorinated and brominated compounds. This combination of detectors covers all of the compounds in the Countermeasures Law, and more. All Environmental DPS GC systems are small, lightweight and modular for expandability, upgrades, and easy service.
Example Compounds:
1,1-Dichelroethene
Dichloromethane
cis-1,2,-Dichloroethene
1,1,1-Trichloroethane
Carbon Tetrachloride
Benzene
1,2-Dichloroethane
Trichloroethylene
cis-1,3-Dichloropropene
trans-1,3-Dichloropropene</span
1,1,2-Trichloroethene
Tetrachloroethylene
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