Download or read book Application of Deuterated Organics as Internal Standards in Volatile Organic Analysis from Drinking Water and Wastewater by Computerized Gas Chromatography Mass Spectrometry written by RF. Devine and published by . This book was released on 1979 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method utilizing computerized gas chromatography-mass spectrometry (GC-MS) is presented for qualitative and quantitative determination of volatile organics in drinking waters, natural waters, or industrial effluent waters. It is based on the addition of deuterated internal standard, 1,2-dichlorethane-d4, to an appropriate-sized portion of sample and use of the Bellar-Lichtenberg method of purge-trap-desorb into determinative instrument. Method validation consisted of analyzing volatile priority pollutants at 2, 10, 50, 100, and 200 ppb with internal standard at 20 ppb in each of seven replicate analysis at each dose. Comparison of relative standard deviations (RSD) of internal and external standard methods of GC-MS analysis revealed no significant differences. This study also yielded valuable information concerning repeatability, reproducibility, stability of internal standard, linear dynamic range of GC-MS, and RSD variation with different area regenerations of diagnostic atomic mass units. Pollutant identification is based on retention time and total mass spectral comparison with authentic compound. Quantitation is based on measurement of the areas of retrieved diagnostic atomic mass unit regeneration of contaminant and internal standard. Using response factors determined from analysis of standard mixtures containing compounds of interest and internal standard, and the known mass of internal standard, the concentration is calculated. Lower detection limit for the volatile priority pollutants is approximately 1 ?g/litre. This method has detected several volatiles that are not Environmental Protection Agency priority pollutants.

Download or read book Measurement of Organic Pollutants in Water and Wastewater written by C. E. Van Hall and published by ASTM International. This book was released on 1979 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Water supply Paper written by and published by . This book was released on 1982 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Water supply Paper written by and published by . This book was released on 1987 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Organic Compounds in Drinking Water by Liquid solid Extraction and Capillary Column Gas Chromatography mass Spectrometry written by and published by . This book was released on 1988 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Analysis of Purgeable Organics in the Drinking Water of Five U S Cities Using Gas Chromatography mass Spectrometry GC MS written by and published by . This book was released on 1975 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Glass Capillary Gas Chromatographic Mass Spectrometric Analysis of Organics in Drinking Water Concentrates and Advanced Waste Treatment Water Concentrates II written by DCK Lin and published by . This book was released on 1979 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A scheme has been established to analyze complex organic mixtures of water concentrates. It includes addition of deuterated internal standards to the concentrate, fractionation of the concentrate through a combination of extraction under both acidic and basic conditions, partitioning on a short silica gel column, and finally, analysis of the partitioned fractions as well as the unpartitioned concentrate by glass capillary gas chromatography using a flame ionization detector (GC-FID) and glass capillary gas chromatography coupled to a mass spectrometer (GC-MS). The GC-FID and GC-MS analyses are conducted on two types of wall-coated open-tubular glass capillary GC columns, one containing a nonpolar liquid phase (SP2100) and the other a polar liquid phase (SP1000).

Download or read book Methods for the Determination of Organic Compounds in Drinking Water written by and published by . This book was released on 1990 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Five year Index to ASTM Technical Papers and Reports written by American Society for Testing and Materials and published by . This book was released on 1976 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Organics Analysis Using Gas Chromatography mass Spectrometry written by William L. Budde and published by Butterworth-Heinemann. This book was released on 1979 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sampling and Analysis Procedures for Screening of Industrial Effluents for Priority Pollutants written by and published by . This book was released on 1977 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Isolation of Purgeable Organics from Solid Matrices by Vacuum Distillation written by Michael Hiatt and published by . This book was released on 1982 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book IDENTIFICATION OF VOLATILE ORGANIC COMPOUNDS IN WATER BY GAS CHROMATOGRAPHY MASS SPECTROMETRY USING PURGE AND TRAP SAMPLE CONCENTRATION AND INTRODUCTION written by Bruce T. Heitke and published by . This book was released on 1983 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this investigation was to evaluate the purge and trap methods and the Hewlett-Packard model 7675A purge-and-trap sampler for the identification of volatile compounds in water by gas chromatography/mass spectrometry. The manner in which this instrument accomplished the transfer of volatile components in water to the chromatographic column is thoroughly described. Guidance is given to the analyst in the specification of operating parameters for the optimization of this transfer. The instrument was evaluated with both packed and capillary columns by using: (1) the volatile organics among Environmental Protection Agency's (EPA's) priority pollutants and (2) ground water samples from Rocky Mountain Arsenal. The Hewlett-Packard model 7675A purge-and-trap sampler proved to be adequate for identifying removable organic compounds in water at concentrations of 4 ng/ml (4 ppb) provided that packed-column chromatography is sufficient to resolve the components. This instrument is not suitable for capillary column applications.

Download or read book Mass Spectrometry Bulletin written by and published by . This book was released on 1992 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Volatile Organic Compounds in Water by Sorptive Extraction and Gas Chromatography Mass Spectrometry written by Anthony John Hassett and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods for the Determination of Inorganic Compounds in Drinking Water written by and published by . This book was released on 1989 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selecting an Appropriate Isotopic Internal Standard for Gas Chromatography Mass Spectrometry Analysis of Drugs of Abuse Pentobarbital Example written by RH. Liu and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal standards are commonly used for the quantitative determination of drugs of abuse and their metabolites (drug/metabolite) in biological fluids and tissues by the selective ion monitoring (SIM) gas chromatography/mass spectrometry (GC/MS) procedure. Analogs of drugs/metabolites that are labeled with three or more deuterium atoms (Isotopic analog) at appropriate positions are considered to be the most effective internal standards for these applications. Before a specific deuterated analog can be adopted as an internal standard in a GC/MS assay, the mass spectrum of the compound or its derivative must be evaluated along with the corresponding spectrum from the parent drug/metabolite. There should be an adequate number of sufficiently high-mass ions (typically three for the drug/metabolite and two for the isotopic analog) that can be attributed to each analyte, and these ions should be sufficiently free of interference from the other analyte of the pair (cross-contribution) Interferences may be caused by the presence of an isotopic impurity in the deuterated analog (extrinsic factor) or may be due to the ion fragmentation characteristics of the compound (intrinsic factor) The extrinsic factor may be corrected by the manufacturer with different synthetic methods and purification procedures, while the intrinsic factor may be partially or wholly corrected through the use of different chemical derivatives (sample preparation stage) or different ionization (GC/MS assay stage) procedures.