What is the difference between HS-GC-FID and GC-MS

Could anyone suggest a GC/FID or GC/MS method for the quantitative analysis of carbon monoxide?

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Introduction:
4-nitrotoluene (4-NT) and 4-nitroaniline (4-NA) are two of the more important breakdown products of nitrobenzene explosives, such as trinitrotoluene (TNT).The relative and absolute abundance of these substances in soils or waters contaminated with explosives residues (e.g. at abandoned army facilities) gives important information about the rates and mechanisms of explosive degradation reactions, so it is essential that there are accurate analytical methods for their determination. Due to the fact that there are many different breakdown products for explosives, gas chromatography with mass spectrometric detection (GC-MS) is a very popular method for their determination. In order to quantify each compound accurately, it is important to achieve good chromatographic separation between the individual compounds. In this lab, you will characterize the separation of 4-NT and 4-NA by GC-MS, and study parameters that influence this separation.

The developed GC-MS method was validated and demonstrated to be suitable for the quantitative analysis of target compounds in a range of TDOs.

Transylvanian glass icons: A GC/MS study on the …

Previously, Mr. Redman served as a Laboratory Director, Sales Director, Marketing Director, and Technical Director for TestAmerica. Mr. Redman's technical expertise combined with a detailed understanding of regulatory compliance and other client requirements has driven TestAmerica's 3-fold expansion of its high-resolution GC/MS and LC/MS services. From Dioxins to PCB Congeners, Brominated Flame Retardants and other emerging contaminants, Mr. Redman has championed commercial application of state-of-the-art analytical services across a wide range of markets. He provides support for clients, regulators, and other data users regarding trace level analyses, including Dioxins/Furans, PCB Congeners, Pesticides, Endocrine Disrupting Compounds, and Emerging Contaminants. Mr. Redman has extensive experience in industrial and government programs supporting projects for the EPA, ACOE, Navy, and AFCEE.

The extract was then cleaned with primary and secondary amine (PSA) and octadecylsilane (C18) absorbents, filtered and analysed by GC-MS/MS.

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What are the volatility limits of GC/MS in terms of analyte boiling points or vapor pressures


The importance of GC and GC-MS in perfume ..

In the present study, the GC-MS analysis of methanol extract of revealed that the grass contained a wide range phytocompounds which may responsible for its therapeutic potentials. The compounds identified depicted six peaks and this implies the presence of six phytocompounds in the extract (). The active principle, area of peak concentration (%), Retention Time (RT), Molecular Weight (MW) and Molecular Formula (MF) in the methanol extract as identified through the NIST database are listed in .

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Column fractionation of ethanol extract: The dry crude extract was subjected to column chromatography according to standard method. The sample for the column was prepared by adsorbing 20 g of the ethanol extract of with 60 g of silica gel G (60-120 mesh). The mixture was air dried and carefully layered on top of the packed silica gel in the column (14 cm length) using a glass funnel. The extract in the column was eluted with 100 mL of methanol at the rate of 1 mL min–1. The eluates were concentrated and labeled. The percentage yield of the fraction was recorded. The methanol fraction of leaves was analyzed by Gas Chromatography-Mass Spectrometry (GC-MS).

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Previously, Mr. Redman served as a Laboratory Director, Sales Director, Marketing Director, and Technical Director for TestAmerica. Mr. Redman's technical expertise combined with a detailed understanding of regulatory compliance and other client requirements has driven TestAmerica's 3-fold expansion of its high-resolution GC/MS and LC/MS services. From Dioxins to PCB Congeners, Brominated Flame Retardants and other emerging contaminants, Mr. Redman has championed commercial application of state-of-the-art analytical services across a wide range of markets. He provides support for clients, regulators, and other data users regarding trace level analyses, including Dioxins/Furans, PCB Congeners, Pesticides, Endocrine Disrupting Compounds, and Emerging Contaminants. Mr. Redman has extensive experience in industrial and government programs supporting projects for the EPA, ACOE, Navy, and AFCEE.

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Using GC-MS with either solvent back extraction or liquid dilution for sample preparation, 33 volatile compounds were identified using standards, while an additional 71 compounds were tentatively identified in TDOs.