analytical chemistry Articles
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Comparing Remediation & Bioremediation: Which is best, and when?
“Seeing is believing” is certainly true when it comes to remediation. Many are more likely to believe physical removal of contamination is more effective because they can see it happening. But just because bioremediation is invisible to the naked eye, does that make it a less trustworthy choice? Ultimately the proof is in the analytical chemistry. In this month’s blog, we ...
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Integrated Environmental Site Characterization and Analysis: EQuIS in the Military (PDF)
The seamless integration of subsurface environmental geology and analytical chemistry data with the latest tools and technology for data management and analysis make site characterization and investigation more efficient than ever before. EarthSoft’s Environmental Quality Information System—EQuIS—has been chosen by many military agencies and organizations for the management of analytical ...
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pH measurement: Six technical tips
The pH value is one of the most important and therefore also one of the most frequently measured quantities in analytical chemistry. Sometimes, a simple pH test strip is sufficient for making a rapid check; precise pH meters are, however, required whenever accurate measuring results are needed. Such a pH meter is available in nearly every laboratory and is generally ready for use at a moment's ...
By Metrohm AG
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Chemical Pollutants in Water Emerge
Recent advances in contaminant identification methodologies, sampling instrumentation, and analytical chemistry have caused an explosion of knowledge about the presence of previously undetected organic micropollutants. While it doesn’t follow that the mere presence of chemical contaminants results in harm, public health experts, regulators, and others aren’t sitting idly ...
By Acta Group
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EDXRF Analysis of Lead, Cadmium, Silver, Copper in Lead-Free Solder Materials
X-ray fluorescence analysis can be used to quickly and easily analyze samples in solid, powder, and liquid states nondestructively, and is therefore widely used as a screening technique for compliance with the RoHS/ELV directives. A large amount of lead-free solder is used for surface-mount circuit boards. Here we evaluated the sensitivity of analysis of Pb, Cd, Ag, and Cu in lead-free solder ...
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New Analytical Chemistry Paper on CHARON PTR-TOFMS Performance
Bulk Organic Aerosol Analysis by PTR-MS with High Precision & Accuracy Very recently, we have published a technical note in Analytical Chemistry introducing an improved methodology for the determination of organic aerosol properties with CHARON PTR-TOFMS. By analysis of a large set of pure compounds we were able to derive an algorithm to correct for ionic fragmentation. Therefore CHARON is ...
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Differentiating Polychlorinated Biphenyls (PCB’s) by GC / FID / ECD
The analytical chemistry of PCB’s is rigorous, demanding the highest quality in sample preparation and analytical technique. Insufficient sample extraction and inappropriate methods of sample clean-up are the most common sources of error in PCB analysis, which causes significant interference in the chromatography. However, even in relatively clean samples the problem remains to ...
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The role of measurement uncertainty in doping analysis
The determination of measurement uncertainty is a critical issue in all fields of experimental science; its importance becomes maximal in the specific case of forensic analytical chemistry (including doping analysis), where uncertainty has not only to be calculated with precision, but it also has to be both small and reliable enough to support effective decision making. This contribution gives a ...
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Introduction to Environmental Testing in the USA
Environmental laboratories practice “applied analytical chemistry” by analyzing samples using a list of potential contaminants to determine how much, if any, of the contaminant is present. These contaminants, the methods used to analyze for them, and the maximum amount of contaminant allowed in the sample are defined by regulation. This paper provides an overview of these ...
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Productivity at the Commercial (or pay per test) Laboratory - White Paper
Commercial environmental laboratories practice “applied analytical chemistry” by analyzing samples using a list of potential contaminants to determine how much, if any, of the pollutants are there. The data collected may be used by the laboratory’s client to, among other reasons, satisfy a regulatory permit, or for routine monitoring as required by a regulatory agency, such as ...
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Determination of Cadmium in the Tap Water by Flameless Atomic Absorption Spectrometry
The standard for the allowable concentration of cadmium in tap water has been revised downward from 0.01 mg/L or less to 0.003 mg/L or less according to Japan's "Ministerial Ordinance for Partial Revision of the Ordinance Concerning the Water Quality Standard" (The Ministry of Health, Labour and Welfare Ordinance No.18) (February 17, 2010). The revised standard has been in effect since April 1, ...
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Evaluation of Indian input to the international nuclear information system database
The study is aimed at analysing the INIS bibliographic records of publications in India during the period 2000-2008. The analysis includes the inputting trend, time-lag, contributing journals, country collaboration, content analysis through the classification and keywords. India has a total number of 14,697 records input to the database with an yearly average of 1631 records. The timeliness of ...
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The Development of Atomic Absorption Spectrometry (AAS)
It all began in the 1950s with a pioneering article by Alan Walsh. Today, it is an established standard technology in the field of analytical chemistry: atomic absorption spectrometry (AAS). AAS has experienced amazing development through the decades. In addition to newer ICP technologies, modern AAS systems such as Analytik Jena’s contrAA 800 exist thanks to ongoing technological ...
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Assessment of organic micropollutants occurrence in treated wastewater using heat shock protein 47 stress responses in Chinese hamster ovary cells and GC/MS-based non-target screening
Combining bioassays and analytical chemistry screening is a powerful approach to assess organic micropollutants which are the main contributors to toxic potential in complex mixtures of treated wastewater (TWW). The aim of this study was to perform a comprehensive toxicity assessment of treated effluents using stress response bioassays and then to assess the occurrence of the organic ...
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IFPAC 2017 – Booth 214
Join Michelle at the International Forum on Process Analytical Chemistry (IFPAC), booth 214, for a demonstration of our new Computrac® Vapor Pro® XL and discover how Computrac® moisture analyzers can help improve your quality control process. On display at the show: Computrac® Vapor Pro® XL – Chemical Free Karl Fischer Alternative The Vapor Pro® XL is the ...
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EQuIS© and the New Jersey Department of Environmental Protection Private Well Testing Act
Many military bases in the United States have had environmental clean-up programs in place since the early 1980’s. On some of these facilities extensive multi-stage investigations and remediation projects have generated large amounts of data. The management and effective use of the accumulated information for subsequent clean-up work is a daunting task unless electronic data management software ...
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How to Improve the Sensitivity, Long-Term Stability and Throughput of your ICP-MS
More Performance for your ICP-MS ICP-MS (inductively coupled plasma mass spectrometry) is a widely used technology for analytical chemistry. Their multi-element detection capability, the lowest detection limits in the ppb-ppq area, and their versatility make ICP-MS systems the ideal analytical instruments for an incredible range of applications. Whether in the environmental sector, food ...
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What Role Does Gas Chromatography Play in Analytical Chemistry?
Analytical chemistry is a complex discipline that focuses on extracting information about the composition and structure of samples using advanced techniques. Generally speaking, these samples must be separated into their component parts for identification and quantification. Thus, separative techniques like gas chromatography (GC) are central to the field. Both qualitative and quantitative ...
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What is laser ablation and why you need a nitrogen generator
Laser ablation is becoming a popular technique for direct solid sampling in analytical chemistry. But what exactly is laser ablation and why would you need a nitrogen generator for it? Laser ablation is a process in which a laser beam is used to remove a portion of mass from a sample, usually as a sampling method for isotopic or elemental analysis of a solid sample. The mass from the sampling ...
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