chromatography laboratory Articles
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Scottish Company Peak Scientific offer solutions to the world helium shortage
Recent international studies have confirmed that the world will run out of helium gas in 25 years if current usage remains unchecked. As well as concerns for the future the gases scarcity has seen its price rise by 70% in recent years. Used in a multitude of applications such as cryogenic applications, purging/pressuring, welding cover gas and controlled atmosphere testing, demand for helium gas ...
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Zero Air and on-site gas generation
Zero Air is air which is filtered to ensure it only contains less than 0.1 parts per million (PPM) of total hydrocarbons. Essentially a mixture of oxygen and nitrogen, zero air is required for laboratory applications which would be negatively affected by the presence of hydrocarbons or small levels of sulphur or nitrous oxide. These gases can sometimes be present in air due to pollution. A ...
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Helium shortage
Helium is well known as Helium that makes balloons and airships float and in its liquid form, Helium is used in a variety of applications including cooling for magnets in Magnetic Resonance Imaging (MRI) scanners, cooling infrared detectors, and as a superconductor coolant in the large hadron collider at CERN. Helium is distilled from natural gas deposits that have collected in the presence of ...
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Hydrogen Performance for Carrier Gas
Owing to the worldwide helium shortage, many labs are facing supply difficulties of helium, one of the most commonly used carrier gases and as a consequence are facing rapid price increases. Many chromatography labs are therefore looking for alternative carrier gases and for many GC applications, hydrogen provides a good, in some cases better, alternative to helium. The perceived danger of having ...
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Alternative solutions to Helium
Hydrogen generators offers a number of advantages to Helium for gas chromatography including lower cost, availability through electrolysis of water, and improved sampling speed. Helium is well known as Helium that makes balloons and airships float and in its liquid form, Helium is used in a variety of applications including cooling for magnets in Magnetic Resonance Imaging (MRI) scanners, ...
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Fuel dilution in engine crankcases: A fast field method for the workshop
What is fuel dilution and why is it a problem? Fuel dilution in oil is a condition caused by excess, unburned fuel mixing with engine oil in an engine crankcase. Hydrocarbon-based fuel, usually with a lower vapor pressure than the lubricant, has a thinning effect, lowering the oil viscosity. Oil film strength is reduced, increasing the cylinder liner and bearing wear. Reciprocating engines ...
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ChlorAC Buffer
Introduction Trace analysis of carbamate insecticide residues in water is a routine requirement in the U.S. Since several of the common carbamates — Carbaryl, Oxamyl, Hydroxycarbofuran — are labile in water due to oxidation or hydrolysis, the samples and standards must be preserved in order to obtain valid results. USEPA Method 531.1 specifies pH adjustment, dechlorination, and cold ...
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SCION Compass Chromatography Data System CDS Overview
A Chromatography Data System (CDS) plays a pivotal role in instrument control, data processing, report generation and data archiving. It is essential for Chromatographic Analysis, including high-performance liquid chromatography (HPLC), gas chromatography (GC), ion chromatography (IC), supercritical fluid chromatography (SFC), and capillary electrophoresis (CE), ultra-high performance liquid ...
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BTEX monitor, equal performances to laboratory chromatographs
Environnement S.A leveraged its technical leadership in this field with an extensive experience, being one of the first companies creating its first BTEX analyser almost 20 years ago. The VOC72M third generation of the series is, up to now, the most compact and fully automated analyser on the market, self-contained and newly designed for providing equal performance to the laboratory ...
By ENVEA
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Arizona Facilities Supply - Case Study
Name: Kirk Schmitz Job Title: Laboratory Administrator Company: Arizona Facilities Supply, LLC. | Scottsdale, AZ Kirk Schmitz - Laboratory Administrator, Arizona Facilities Supply, LLC Precision series improves analysis quality for Arizona testing laboratory Arizona Facilities Supply (AZFAC), LLC. is a commercial horticulture and biotech company with an in-house chromatography lab located ...
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Improve gas blending accuracy and save money – Case Study
For DataChem Laboratories, precision mass flow is crucial. DataChem, originally established in 1973 as part of the University of Utah's Research Institute, has grown into a world respected analytical testing laboratory. They have the important job of testing and identifying harmful industrial and environmental toxins—from lead paint found on our children's toys to methamphetamine dust ...
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Advanced Treatment of Produced Water for Crop Irrigation - Case Study
The Situation California is currently facing one of the most severe droughts in recorded history. In order to mitigate the drought conditions, various water conservation measures have already been implemented, and others are being considered. One method under consideration is using the advanced treatment of produced water to make it available for irrigation. A major challenge to the success of ...
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Gas chromatography - What are Columns?
Liquid and gas chromatography instruments wouldn't work without columns. Both liquid and gas chromatography analyze samples by separating them into their individual chemical components. A column, a long tube lined with specialized chemicals, is required for this process as it forms part of the instrument which performs the separation. When a sample makes its way through the tube, certain ...
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A Promising Future for Butanol
With several beneficial attributes that make it a good blending agent in gasoline, butanol continues to hold promise for use as a biofuel. It is compatible with existing vehicles and refueling infrastructure. Low vapor pressure, high octane number and favorable distillation properties all add to the high blending value of butanol. Now, a new ASTM International standard will be used in isobutanol ...
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Novel diesel-oil-degrading bacteria and fungi from the Ecuadorian Amazon rainforest
Isolating new diesel-oil-degrading microorganisms from crude-oil contaminated sites and evaluating their degradation capacities are vitally important in the remediation of oil-polluted environments and crude-oil exploitation. In this research, new hydrocarbon-degrading bacteria and fungi were isolated from the crude-oil contaminated soil of the oil-fields in the Amazon rainforest of north-east ...
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Innovations in Site Characterization. Case Study: Dexsil L2000 PCB/Chloride Analyzer for Drum Surfaces
Executive Summary This case study describes a field analytical method that was used to measure PCB surficial contamination in empty drums to be cleaned by a new process. Approximately 7,000 empty 55-gallon drums that previously contained PCB-contaminated material had accumulated at the Department of Energy (DOE)’s East Tennessee Technology Park in Oak Ridge, TN. Because disposal of these drums ...
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Validation of a New Method for Screening Soil and Water for TCE Contamination
INTRODUCTION ASTM Method D 7203-06, Standard Test Method for Screening Trichloroethylene (TCE)-Contaminated Media Using a Heated Diode Sensor, (ASTM 2006) can be used to screen a sample of soil or water known to contain the halogenated volatile organic compound (HVOC) TCE. The method calls for measuring the TCE concentration in the headspace above the sample using a heated diode sensor ...
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Soil CO2 Flux Measurements -- Using the LI-8100 System to Collect Air Samples for Estimating Soil Trace Gas Flux
Air samples can be collected from the same air stream used to measure soil CO2 flux with the LI-8100 Automated Soil CO2 Flux System, for estimating the flux of trace gas, such as methane (CH4), ammonia (NH3), nitrous oxide (N2O), isotopic species, etc. This application note describes a simple method for obtaining air samples from the LI-8100 in the field. The concentration of the gas species for ...
By LI-COR
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Software solution for standard and Highly sophisticated GPC systems case study
Today's analytical laboratories require universal, flexible and open software solutions to cope with the ever changing needs. This report illustrates how these requirements for chromatographic data processing software can be met in different types of laboratories. Acquisition and Processing of Chromatography Data In former times an analytical chemist spent most of the time with the analysis ...
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How Do Nitrogen Generators Work? – Pressure Swing Adsorption (PSA)
The gas separation process in PSA nitrogen generators is based on the ability to fix various gas mixture components and particles by a physical solid substance. These are called adsorbents. Adsorption in nitrogen generators The gas separation process in PSA nitrogen generators is based on the ability to fix various gas mixture components and particles by a physical solid substance. These are ...
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