allen s e 1974 chemical analysis of ecological materials
CHEMICAL ANALYSIS OF WATER AND WASTEWATER
... Press LLC Of the ion-selective electrodes other than glass electrodes, the fluoride electrodeis the most successful. It is well-behaved, relatively free of interferences, and has anadequately ... chemical species and a vastly increased data throughput.These developments pose some challenges. Because of the lower detection limits of some instruments, it is now possible to see quantities of ... that are used on water. In this section several specific aspects of water analysis are addressed.Physical Properties Measured in WaterThe commonly determined physical properties of water are color,...
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Tài liệu METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER ppt
... range of the system, dilute the extractwith acetonitrile and reanalyze.12.8 If the measurement of the peak response is prevented by the presence of interferences,further cleanup is required.13. ... analysis of fivespiked wastewater samples as in Section 8.3, calculate the average percent recovery( ) and the standard deviation of the percent recovery (s ). Express the accuracypassessment ... established performance criteria to determine if the results of analysesmeet the performance characteristics of the method. When results of sample spikesindicate atypical method performance,...
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Tài liệu METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER doc
... wastewater samplesmust be assessed and records must be maintained. After the analysis of five spikedwastewater samples as in Section 8.3, calculate the average percent recovery ( ) and thestandard ... This type of detector has proven effectivein the analysis of wastewaters for the parameters listed in the scope (Section 1.1),and was used to develop the method performance statements in Section ... compared with establishedperformance criteria to determine if the results of analyses meet the performancecharacteristics of the method. When results of sample spikes indicate atypical methodperformance,...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER pot
... characteristic masses in the EICPs mustfall within ±20% of the relative intensities of these masses in a reference massspectrum. The reference mass spectrum can be obtained from a standardanalyzed ... the parameters of interest andachieves all acceptable performance criteria (Section 10) may be used. GC toMS interfaces constructed of all glass or glass-lined materials arerecommended. Glass ... calibration.the baseline to valley height between the isomers is less than 25% of the sum of thetwo peak heights. Otherwise, structural isomers are identified as isomeric pairs.13. Calculations13.1 When...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 604—PHENOLS docx
... range of the system, dilute the extract andreanalyze.11.7 If the measurement of the peak response is prevented by the presence of interferences,an alternative gas chromatographic procedure is ... be assessed and records must be maintained. After the analysis of five spikedwastewater samples as in Section 8.3, calculate the average percent recovery ( ) and thestandard deviation of the ... column, specific element detector, or massspectrometer must be used. Whenever possible, the laboratory should analyze standardreference materials and participate in relevant performance evaluation...
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CHEMICAL ANALYSIS OF ANTIBIOTIC RESIDUES IN FOOD pptx
... because of widespread resistance and because of extended persistence of residues in kidney tissues.Aminoglycosides are used to treat individual animalsfor therapeutic purposes rather than metaphylaxis ... food-producing species is associatedwith food safety concerns. The genotoxic and carcinogenicnature of carbadox and its metabolites and the presence of relatively persistent residues in edible tissues of ... aminoglycosides is mediatedthrough bacterial enzymes (phosphotransferases, acetyl-transferases, adenyltransferases), which inactivate amino-glycosides and prevent their binding to the ribosome. Genesencoding...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 605—BENZIDINES pdf
... wastewater samplesmust be assessed and records must be maintained. After the analysis of five spikedwastewater samples as in Section 8.3, calculate the average percent recovery ( ) and thestandard ... reanalyze.12.7 If the measurement of the peak response for benzidine is prevented by the presence of interferences, reduce the electrode potential to +0.6 V and reanalyze. If the benzidinepeak ... depend upon theneeds of the laboratory and the nature of the samples. Field duplicates may be analyzedto assess the precision of the environmental measurements. When doubt exists over theidentification...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 611—HALOETHERS potx
... the system, dilute the extractand reanalyze.12.7 If the measurement of the peak response is prevented by the presence of interferences,further cleanup is required.13. Calculations13.1 Determine ... established performance criteria to determine if the results of analysesmeet the performance characteristics of the method. When results of sample spikesindicate atypical method performance, ... Thus, a single sample may be extracted tomeasure the parameters included in the scope of each of these methods. Whencleanup is required, the concentration levels must be high enough to permit...
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THE STATE OF MICROFINANCE INVESTMENT 2011: MicroRate’s 6th Annual Survey & Analysis of MIVs potx
... MIV s microfinance assets are predominantly debt instruments, as has been the case for the last six years. Of microfinance assets held by MIVs in 2010, debt investments represent 82%, followed ... their relative resilience. The market is emerging from the crisis with a more realistic sense of the inherent risks of the business, particularly in competitive environments, and the sudden ... a web-based analytical service of MicroRate that provides professional investors and researchers with the necessary tools to identify, assess, and monitor MIVs that meet their individual requirements....
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 607—NITROSAMINES docx
... chromatograms.12.8 If the response for a peak exceeds the working range of the system, dilute the extractand reanalyze.12.9 If the measurement of the peak response is prevented by the presence of interferences,further ... established performance criteria to determine if the results of analysesmeet the performance characteristics of the method. When results of sample spikesReferences1. Fine, D.H., Lieb, D., and Rufeh, ... proven effective in the analysis of 1,2wastewaters for the parameters listed in the scope (Section 1.1). Anitrogen-phosphorus detector was used to develop the method performancestatements in Section...
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METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER doc
... the EICPs mustfall within ±20% of the relative intensities of these masses in a reference massspectrum. The reference mass spectrum can be obtained from a standardanalyzed in the GC/MS system ... current profiles. All of these materials must be routinelydemonstrated to be free from interferences under the conditions of the analysis byrunning laboratory reagent blanks as described in Section ... this viewpoint, exposure to these chemicals must be reduced tothe lowest possible level by whatever means available. The laboratory is responsiblefor maintaining a current awareness file of OSHA...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER ppt
... wastewatersamples must be assessed and records must be maintained. After the analysis of fivespiked wastewater samples as in Section 8.3, calculate the average percent recovery(P) and the spandard ... assess the precision of the environmental measurements. Wheneverpossible, the laboratory should analyze standard reference materials and participate inrelevant performance evaluation studies.9. ... interference restricts the sensitivity of the GC/MS analysis, theanalyst should employ additional cleanup procedures and reanalyze by GC/MS.12.10 In those circumstances where these procedures...
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![Designation: C 471M – 96 METRIC - Chemical Analysis of Gypsum and Gypsum Products [Metric]1 ppsx](https://media.store123doc.com/images/document/2014_07/10/small_jfk1405009249.jpg)
Mechanics and Analysis of Composite Materials ppt
... of the shear stress indicate the plane on which the stresses act. For stresses shown in Fig. 2.1, this is the plane whose normal is parallel to axis-z. The second subscript of the shear ... nevertheless governed by the same general laws and principles of mechanics whose brief description is given below. 2.1. Stresses Consider a solid body referred to Cartesian coordinates as in ... the stressed state of a solid. 2.3. Stresstransformation Consider the transformation of a stress system from one Cartesian coordinate frame to another. Assume that the elementary tetrahedron...
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