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Book Preservation of Water Samples Containing Nitroaromatics and Nitramines

Download or read book Preservation of Water Samples Containing Nitroaromatics and Nitramines written by and published by DIANE Publishing. This book was released on with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Comparison of Cartridge and Membrane Solid phase Extraction with Salting out Solvent Extraction for Preconcentration of Nitroaromatic and Nitramine Explosives from Water

Download or read book Comparison of Cartridge and Membrane Solid phase Extraction with Salting out Solvent Extraction for Preconcentration of Nitroaromatic and Nitramine Explosives from Water written by and published by . This book was released on 1992 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book New Approaches to the Preservation of Contaminants in Water Samples

Download or read book New Approaches to the Preservation of Contaminants in Water Samples written by Jitendra Saxena and published by . This book was released on 1979 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Special Report

Download or read book Special Report written by and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Determination of Nitroaromatic Nitramine and Nitrate Ester Explosives in Water Using SPE and GC ECD Comparison with HPLC

Download or read book Determination of Nitroaromatic Nitramine and Nitrate Ester Explosives in Water Using SPE and GC ECD Comparison with HPLC written by Marianne E. Walsh and published by . This book was released on 1998 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical method for the determination of nitroaromatic, nitramine, and nitrate ester explosives and Co-contaminants in water was developed based on SPE (solid-phase extraction) and GC-ECD (gas chromatograph-electron capture detector). Water samples are preconcentrated using either cartridge or membrane SPE followed by elution with acetonitrile. The acetonitrile extract is compatible with both liquid and gas chromatography, thereby allowing direct comparison of concentration estimates obtained by different methods of determination. Quantitative GC analyses were obtained by using deactivated direct-injection-port liners, short wide-bore capillary columns. and high linear carrier gas velocities. Recoveries from spiked samples were 90% or greater for each of the nitroaromatics and nitrate esters, and greater than 70% for nitramines and amino-nitrotoluenes. Estimates of analyte concentrations in well-water extracts from military sites in the United States and Canada analyzed by GC-ECD and the standard HPLC (high performance liquid chromatography) method showed good agreement for the analytes most frequently detected (HMX octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine, RDX hexahydro-1,3,5-trinitro-1,3,5-triazine, TNT 2,4,6-trinitrotoluene, and TNB 1,3,5-trinitrobenzene). The GC method provides lower method detection limits for most analytes than HPLC, but accurate calibration is more difficult. The ultraviolet (UV) detector used for the HPLC analysis has much greater linear range than the ECD used for GC analysis. In addition. the GC instrumentation requires more care than the LC. Specifically the injection port liner must be changed frequently to maintain accurate determination of the nitramines. Because the sample preparation technique yields extracts that are compatible with both GC and HPLC analysis, confirmation of analyte presence can be obtained based on different physical properties.

Book Bibliography of Agriculture with Subject Index

Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1996 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Selected Water Resources Abstracts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Improved Salting Out Extraction preconcentration Method for the Determination of Nitroaromatics and Nitramines in Water

Download or read book Improved Salting Out Extraction preconcentration Method for the Determination of Nitroaromatics and Nitramines in Water written by Paul H. Miyares and published by . This book was released on 1991 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Government Reports Announcements Index

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Book Chromatography in Environmental Protection

Download or read book Chromatography in Environmental Protection written by Tibor Cserhati and published by CRC Press. This book was released on 2000-12-21 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chromatography has been developed as a powerful and rapid technique for the separation of compounds with highly similar molecular characteristics, even from complicated matrices. Due to their excellent separation characteristics and Versatility, chromatographic methods have found growing acceptance and application in environmental protection for residue analysis in air, ground and surface waters, sewage, sludge, soil matrices, etc The book will be of interest to analytical chemists in legalisation and research and to analytical control specialists, as well as to researchers and students.