Agilent manuals, page 50
Agilent PBDE Analysis by GC-ICP-MS: Rapid sensitive detection of polybrominated diphenyl ethers (Technical Feature) Manual
This document introduces the Agilent GC-ICP-MS method for rapid and sensitive detection of polybrominated diphenyl ethers. The method has a wide dynamic range and high sensitivity and can be used for the detection of complex samples.
Agilent Optimizing Analytical Performance Extending the Application Range of Thermal Desorption for Monitoring Air Indoors Inside Vehicle Cabins Manual
Thermal desorption (TD) is a readily automated gas extraction technology based on standard gas chromatography parameters. It provides an efficient, high-sensitivity alternative to conventional solvent extraction. The process of TD involves the extraction of volatile or semivolatile organic compounds from a sorbent or material by heating the sample in a flow of inert gas. The extracted analytes are then transferred in the flow of carrier gas to the analyzer [typically a gas chromatograph (GC) or a gas chromatograph/mass spectrometer (GC/MS)] as a small, discreet, and concentrated volume of vapor. The thermal desorber becomes a multipurpose, standalone GC injector. Concentration factors as high as 105 to 106 can be achieved using modern systems with analytes collected from tens to hundreds of liters of air being delivered to the analyzer in as little as 200 µL of gas. Though inherently simple, many factors contribute to the performance and efficiency of the TD process, which determines the ultimate sensitivity and reliability of a TD-based analytical method. These factors include retention efficiency (during sampling/focusing), desorption efficiency, artifacts, band broadening, and analyte/system stability. This overview describes optimization of all of these parameters during the development and validation of TD procedures. Examples of optimum method performance in terms of precision, linearity, and sensitivity are presented. A novel approach to overloading.
Agilent Round-the-Clock Online Cryogen-Free Monitoring of Hydrocarbons in Ambient Air Using Thermal Desorption-Gas Chromatography Manual
The document introduces the UNITY™-Air Server of Airtech, which is a new technology for online monitoring of volatile organic compounds (VOCs) in air. This technology can be coupled with a gas chromatograph (GC) or a gas chromatograph/mass spectrometer (GC/MS) and is suitable for unattended operation in remote field.
Agilent Application of SecureTDTM for Re-collection Repeat Analysis of Desorbed Samples Manual
Introduced a new thermal desorption technology, which has the advantages of high sensitivity, high recovery rate, no solvent and low cost.
Agilent The Benefits of Setting Up a UNITYe-Based Thermal Desorber Using an Agilent 6890 GC s Electronic Pneumatic Control Manual
Agilent LC-ICP-MS Connection Kit for Agilent 7500 Series Manual
The LC-ICP-MS Connection Kit for Agilent 7500 Series Technology allows routine and overnight running of integrated LC-ICP-MS analyses. It provides routine detection and quantification of elemental species. Isotope analysis capability of ICP-MS enables isotope dilution and isotope tracer studies to be performed.
Agilent GC-ICP-MS Interface Technology Brief Manual
Agilent GC-ICP-MS Interface Technology is the first fully integrated solution for the coupling of the two techniques, combining Agilent's expertise in gas chromatogra- phy (GC) and inductively coupled plasma mass spectrometry (ICP-MS). The separation capabilities of gas chromatography and the high sensitivity and selectiv- ity of the Agilent 7500 Series ICP-MS provide analysts with the capability to separate and quantitate ultra- trace levels of organometallic compounds.
Agilent Gas Chromatography Sulfur Chemiluminescence Detection for Low-Sulfur Diesel Manual
This document briefly describes the ability of the Agilent 355 Sulfur Chemiluminescence Detector (SCD) to help refiners meet some of the sulfur measurement challenges for low-sulfur diesel fuels. Sulfur compounds occur naturally in petroleum and feedstocks for fuel production. Their presence creates processing challenges and impacts product quality. Many sulfur compounds are toxic, reactive, and corrosive to processing equipment and damage catalysts used in hydrocarbon processing. In terms of the product quality of fuels, sulfur compounds impart undesirable odors and contribute to gum formation in gasoline and diesel fuel, and turbine deposits in jet fuel, especially in military aircraft. From a pollution standpoint, all fuel sulfur contributes to acid rain. It is also known that sulfur compounds poison catalytic converters used in modern automobiles, contributing to other emission problems. In industrialized nations, strict environmental regulations directed toward sulfur have been critical to improving air quality. The U.S. EPA and other environmental regulatory bodies, particularly those in Europe, Japan, and other industrialized nations, have developed regulations.
Agilent 355 Sulfur Chemiluminescence Detector (355 SCD): Sulfur Compounds in Ethylene Propylene Manual
The document introduces the Agilent 355 sulfur chemiluminescence detector for the analysis of trace hydrogen sulfide and carbonyl sulfide as well as other volatile sulfur compounds.
Agilent 355 Sulfur Chemiluminescence Detector (355 SCD): Sulfur Compounds in Distillate Fuels Manual
This document discusses the analysis of commercial jet fuels for sulfur using an Agilent 355 Sulfur Chemiluminescence Detector (SCD). The Agilent 355 SCD exhibits high sensitivity, selectivity, and linear response, combined with the separation capabilities of the Chrompack CP Sil 5 CB capillary column, making it the ideal detector for low-level sulfur analysis. Jet fuels are typically blended from low-sulfur or desulfurized kerosene, cracked blending stocks, and hydrocracked blending stocks. There are two basic types of jet fuels: naptha and kerosene. Naptha jet fuel is primarily produced for military uses and has a wide boiling range, while commercial jet fuels have a narrower boiling point range and are typically sold as JP-5.
Agilent 355Sulfur Chemiluminescence Detector (355 SCD): Odorants Other Sulfur Compounds in Liquefied Petroleum Natural Gases Manual
This document describes the analysis of liquefied petroleum gases according to ASTM D 5504-95. It utilizes gas chromatography with sulfur chemiluminescence detection to identify and quantify sulfur compounds in petroleum feeds and products, including liquefied petroleum gases (LPGs) and natural gas liquids (NGLs). Sulfur compounds can have corrosive effects, inhibit or destroy catalysts in downstream processing, and introduce undesirable properties to products. However, certain odorous sulfur compounds like ethyl mercaptan, tetrahydrothiophene, and occasionally thiophane are intentionally added to propane as warning agents for detecting LPG leaks. The ability to speciate sulfur compounds in these liquids is useful for quality assurance of odorant addition and better control of sulfur compounds in finished products.
Agilent Model 355 Sulfur Chemiluminescence Detector (SCD): Sulfur Simulated Distillation Manual
This document describes the determination of sulfur boiling point distribution and total sulfur content of petroleum and petrochemical products that fall within the scope of ASTM D 2887.
Agilent Model 355 Sulfur Chemiluminescence Detector (SCD): Thiophene in Benzene Manual
This document mainly introduces the analysis method of sulfur content in benzene, and introduces the application of Agilent 355 Sulfur Chemiluminescence Detector (SCD) in the analysis of trace sulfur content in benzene.
Agilent Model 355Sulfur Chemiluminescence Detector (SCD): Sulfur Analysis Versus the Copper Strip Corrosion Test Manual
The copper strip corrosion test is commonly used as a product specification for liquid petroleum gases (LPGs). The test is designed to detect the presence of components that may be corrosive to copper and copper-alloy fittings that come into contact with the product. While the test is very simple to perform, its interpretation can be subjective. Furthermore, the test can produce erroneous results and it does not indicate the actual cause of corrosion, although it is generally assumed to be due to sulfur compounds. Some situations where copper strip corrosion does not perform satisfactorily are as follows. While the presence of carbonyl sulfide does not cause corrosion in LPG systems, corrosive hydrogen sulfide is formed upon hydrolysis of carbonyl sulfide. Thus, an LPG could pass the copper strip corrosion test at its point of production and yet fail at its point of delivery or simply upon storage for a few days. Different LPGs may each pass the copper strip corrosion test, but when commingled could fail. This occurs because of hydrolysis as described or because one could contain a low level of hydrogen sulfide and the other could contain a low level of elemental sulfur. Hydrogen sulfide and elemental sulfur are known to have a synergistic effect on corrosivity. An LPG product could contain corrosive amounts of hydrogen sulfide and yet pass the Agilent Model 355 Sulfur Chemiluminescence Detector (SCD) test.
Agilent 355Sulfur Chemiluminescence Detector (SCD): Sulfur Compounds in Light Petroleum Liquids Such as Gasoline Manual