Analytical Chemistry Articles on Environmental XPRT

Analytical chemistry in the European higher education area

No ...

Jan. 1, 2004

Solutions - Covering analytical methods and practices

A smarter way to take a temperature A Northern California lab automates data- gathering and hands the tracking responsibility over to a computer François Rodigari and Kenneth E. Osborn One of many things that environmental laboratories must do is to track and document the temperatures of the laboratory's incubators and refrigerators. This means that the thermometers used to ...

Apr. 1, 2011

By Horizon Technology, Inc.

Building analytical competence for geoscience students through use of Raman spectroscopy

Introduction: Traditionally, a geologist's analytical toolkit consisted of a hand lens, rock hammer, acid bottle, magnet, and perhaps a polarizing light microscope back in the laboratory. In geoscience professions, these tools are increasingly being supplemented by field and laboratory instrumentation that utilizes spectroscopy. The availability of newly-developed, lower-priced ...

Jan. 1, 2014

By B&W Tek

Method Scaling in Preparative HPLC: Analytical Method & Preparative Method

VOC: “I tried to scale up my analytical HPLC method to prep and it didn’t work.” Andy: This is one of the most common things we hear from chemists wanting to do preparative chromatography. We also hear the following question pretty often too: VOC: “I have a good analytical HPLC method, how do I scale it to ...

Aug. 8, 2016

By Waters Corporation

Associations between perfluoroalkyl compounds and immune and clinical chemistry parameters in highly exposed bottlenose dolphins (Tursiops truncatus)

Perfluoroalkyl compounds (PFCs) are ubiquitous, persistent chemical contaminants found in the environment, wildlife, and humans. Despite the widespread occurrence of PFCs, little is known about the impact these contaminants have on the health of wildlife populations. We investigated the relationship between PFCs (including Σperfluorocarboxylates, Σperfluoroalkyl sulfonates, perfluorooctane ...

Jan. 15, 2013

By John Wiley & Sons, Ltd.

A voyage on the seven c`s - phase II common cause correction of a condenser`s conduct & condensate chemistry

Abstract Experiences in power plant chemistry has moved beyond understanding chemical reactions, controlling reaction rate or preventing reactions from occurring. Today, emphasis is placed on root cause analysis that demands a holistic approach employing multidisciplinary problem solving methods. This may be accomplished through a team effort or the chemist becoming more aware of ...

Jul. 30, 2009

By Intek, Inc.

News on Food 2013, Volume 1: Food Safety and Food Chemistry of Fat Matrices

Analytical testing is used in the production of worldwide food supply from raw materials and ingredients, to finished and packaged goods. This testing primarily serves two purposes: to determine nutritional value and quality, and to guarantee safety. Sigma-Aldrich®, through its Supelco® and Fluka® brands, is very active in product development for food and beverage analysis. ...

Feb. 13, 2014

By MilliporeSigma

Work Hard. Don’t Quit. Keep an Open Mind. Career Tips for the Analytical Scientist!

Tips for Making The Analytical Scientist’s Prized PowerList The Analytical Scientist magazine published its PowerList 2016 of the most influential women in the analytical sciences in October. Named to the list was ...

Dec. 19, 2016

By Waters Corporation

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 ...

Jan. 1, 1

By EarthSoft, Inc

Research experiences in microwave-assisted chemical oxygen demand determination

The conventional COD determination through reflux method, although still much in experimental practice for water and wastewater analysis, is time consuming, complex and prone to a number of errors. A simpler, more rapid, environmentally benign but still precise method would hence be more attractive and is, in point of fact, a pressing need. Contextualised within the concept of Green Chemistry, ...

Mar. 30, 2011

By Inderscience Publishers

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 confidently ...

Jan. 1, 2006

By Buck Scientific Inc

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 ...

Nov. 17, 2011

By Shimadzu Scientific Instruments Inc

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 ...

Apr. 1, 2010

By Acta Group

Characterization of Polymer Carbon Sieves, Graphitized Polymer Carbons and Graphitized Carbon Blacks for Sample Preparation Applications

The use of carbons in sample preparation techniques such as solid phase extraction (SPE) and air sampling has been ongoing for several decades. Recent advancements in sample preparation techniques have led to the use of carbons in micro-SPE (i.e., pipette tips packed with particles), solid phase microextraction (SPME) techniques and carbon coatings for both gas and liquid sample preparation ...

Jul. 9, 2010

By MilliporeSigma

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 ...

Apr. 3, 2015

By Shimadzu Scientific Instruments Inc

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 ...

Jul. 28, 2016

By Metrohm AG

The Spectrex particle counter used in study of pharmaceutical glass delamination.

Delamination, or the generation of glass flakes in vials used to contain parenteral drug products, continues to be a persistent problem in the pharmaceutical industry. To understand all of the factors that might contribute to delamination, a statistical design of experiments was implemented to describe this loss of chemical integrity for glass vials. Phase I of this study focused on the effects ...

May 12, 2011

By Spectrex Corporation

Membrane chemical cleaning: from art to science

Membrane chemical cleaning is an integral part of operation for micro- and ultrafiltration systems in the water industry and has significant impact on process operations. However, this issue has not been adequately addressed primarily for two reasons: 1) cleaning protocols are typically recommended from membrane manufacturers and some cleaners are proprietary; 2) the issues of membrane fouling ...

Jun. 1, 2008

By Pall Corporation

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 ...

Jun. 3, 2005

By Inderscience Publishers

Light Industrial Laundry

A smaller laundry treating 30,000 gallons/day of wastewater was using conventional chemistry with sulfuric acid to drop the pH to 7.5, addition of a coagulant, and a flocculent. The facility has been under pressure from the POTW to reduce the electroconductivity (EC) levels. Past analytical data has shown that the EC levels have averaged 2,100 μohms/cm from the addition of the laundry ...

Jan. 29, 2009

By Integrated Engineers Inc.

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