Gas chromatography/mass spectroscopy GC/MS

Acrylonitrile in both biological and environmental samples is most commonly determined by gas chromatography with a nitrogen-phosphorus detector (GC/NPD) (Page 1985), gas chromatography/flame ionization detection (GC/FID) (EPA 1982a), or gas chromatography/mass spectroscopy (GC/MS) (Anderson and Harland 1980). Infrared spectroscopy (Jacobs and Syrjala... 

Fig. 2. Separation and analysis of polyaromatic sulfur-containing compounds (PASC). Oils 3-1, 3-2, and 3-3 were analyzed by gas chromatography-mass spectroscopy (GC-MS) and gas chromatography-atomic emission detection (GC-AED). Reproduced from Ref. 12, with permission.

Gas chromatography/mass spectroscopy (GC/MS) is probably the best technique to identity a wide array of unknown organic substances in sample matrices. It is also the most positive confirmatory test to determine the presence of pollutants in the sample. Its application in environmental analysis has grown up enormously in the last decade. 

It was found that root bark, containing egg cavities with feces, were avoided by the pine weevil H. abietis, so its feces were investigated in an attempt to find ways to control the weevil. After fractionation by medium-pressure liquid chromatography (MPLC) and analysis with gas chromatography-mass spectroscopy (GC-MS)... 

Although rf-limoncnc is commonly analyzed by gas chromatography/mass spectroscopy (GC/MS), wet chemical analysis is still used for certain applications, particularly by the industries using citrus (/-limonene as a chemical starting material (e.g., for synthesis of adhesive resins). Values of some of the useful properties of crude (/-limonene are listed in Table 5.6. 

PBO was found to be unstable when subjected to add hydrolysis- When JUC -PBO was refluxed with 1 mol L HCl for 1 hour, a single fluorescent radioactive compound was formed. This compound was isolated by preparative high-performance liquid chromatography (IIPLC) and identified by gas chromatography-mass spectroscopy (GC-MS), high-resolution MS, nuclear magnetic resonance (NMR), and comparison of HPLC retention time with a synthetic standard. 

Thin-layer chromatography (TLC) was used to identify safrole, isosafrole, and dihydrosafrole in rat urine and bile (Fishbein et al., 1967). Gas chromatography-mass spectroscopy (GC-MS) and gas liquid chromatography-mass spectroscopy (GLC-MS) were utilized to identify the urinary metabolites of safrole in the rat (Klungsoyr and Scheline, 1983). Plasma and tissue safrole concentrations in rats and humans were measured by GC-MS. Urinary metabolites were identified using TLC and GC-MS (Benedetti et al., 1977). 

Treated samples were analyzed by three different labs using either gas chromatography/mass spectroscopy (GC/MS) or GC/MS/MS methods. Analysis by gas chromatography alone was unsuccessful, partly due to the... 

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