Ion Analysis Articles | Environmental XPRT

Multiply-charged ion nanobeams

Due to the strong evolution in the field of nanotechnologies and the continuous miniaturisation of electronic components, multiply-charged ion nanobeams would be a promising tool in this field of research. Either for surface modification or local (nanometre scale) surface analysis purposes, studying the feasibility of such beams is of strong interest. In the present contribution, we present a ...

Jun. 16, 2008

By Inderscience Publishers

Analysis of Voglibose in pharmace utical formulat ions by HPLC with post-column derivat izat ion

Voglibose is an Alpha-Glucosidase inhibitor widely used for the treatment of diabetes. Alpha-glucosidase inhibitors are agents that delay the glucose absorption at the intestinal level and thereby prevent sudden surge of glucose after a meal. Vogilbose is the safest and most effective drug of its class. Since Vogibose has no UV chromophore, post-column derivatization is employed to produce a ...

Jun. 10, 2010

By Pickering Laboratories, Inc.

Group-IV and V ion implantation into nanomaterials and elemental analysis on the nanometre scale

Novel group-IV and V nanomaterials are produced by newly set-up low energy ion implantation and electron beam annealing (EBA) systems at GNS Science. This review paper introduces the community to GNS's new nanotechnology systems. Three representative examples on the use of the systems for nanotechnology research and development are given for (a) subsurface lead ion implantation into Si resulting ...

Feb. 6, 2009

By Inderscience Publishers

Analysis of Nitrofurans Metabolites by Positive Ion Electrospray LC/MS/MS

IntroductionNitrofuran antibiotics are veterinary drugs. The use of these in food production is already banned in the United States,Australia, Canada, Japan, Singapore, Bangladesh, and the European Union because of a possible increased cancer-riskthrough long-term consumption.Trace amounts of nitrofurans contamination has been found in warm-water prawns, shrimp, and chicken. ...

Nov. 1, 2003

Introduction to Ion Exchange Part 1

IMPURITIES IN WATERWater is often referred to as the 'universal solvent' as it will dissolve small amounts of everything it touches. Water collects or dissolves a variety of mineral salts, organic compounds and suspended solids as it flows over the earth's surface and through the ground. These impurities make water undesirable for use in many applications. It is, therefore, important to ...

Feb. 2, 2007

Analysis of the effect of zinc ions on activated sludge microbes by random amplified polymorphism DNA (RAPD)

The effect of zinc ions on activated sludge microbes was investigated. Zinc ions inhibit the degradation and transformation of substances, and acclimation has little effect on the inhibition of ammonia and nitrite transformation. The change of diversity and similarity of the bacterial community acclimated by zinc were analysed by random amplified polymorphism DNA (RAPD). The results showed that ...

Sep. 7, 2004

By Inderscience Publishers

Analysis of Trace Elements and Ions in Ambient Fine Particulate Matter at Three Elementary Schools in Ohio

ABSTRACT The results from a chemical characterization study of fine particulate matter (PM2.5) measured at three elementary schools in Central and Southeast Ohio is presented here. ...

Apr. 1, 2007

By Air & Waste Management Association (A&WMA)

Multivariate analysis of the transport in an Ion Exchange Membrane Bioreactor for removal of anionic micropollutants from drinking water

The present study focuses on investigating the effects of biological compartment conditions on the transport of nitrate and perchlorate in an Ion Exchange Membrane Bioreactor (IEMB). In this hybrid process, the transport depends not only on the membrane properties but also on the biological compartment conditions. The experiments were planned according to the Plackett-Burman statistical design in ...

Jan. 1, 2011

By IWA Publishing

Analysis of Organophosphorus and Organonitrogen herbicides in water using GC/MS with selected ion recording

Laboratories monitoring trace level pesticides and herbicides by gas chromatography/mass spectrometry (GC/MS) frequently utilize Selected Ion Recording (SIR) techniques to maximize analytical sensitivity for quantification. With analytical standards, precision is limited to a large extent only by the autosampler and other instrumental effects. However, real-world samples pose a greater challenge. ...

Oct. 28, 2011

By PerkinElmer, Inc.

Hyphenated techniques as modern detection systems in ion chromatography

Ion chromatography (IC) with conductivity detection has been successfully used to analyze low-molecular organic compounds such as amines and organic acids, as well as anionic and cationic substances. However, due to current toxicity concerns and the consequently lowered maximum contaminant levels (MCL), analyses in complex matrices require improved sensitivity and selectivity. The coupling of IC ...

Jun. 23, 2009

By Metrohm AG

Analysis of Phenolic Estrogen Mimics in River Water by Negative Ion Electrospray LC/MS/MS

IntroductionBisphenol A (BPA) is a primary raw material used for the production of polyacrylates, epoxy resin, phenolic resin, andpolycarbonate plastic. 4-Nonylphenol (4-NP) is a degradation product of alkylphenol ethoxylate detergents used inhousehold and industrial cleaning products. Alkylphenol ethoxylate is also widely used as an additive in plastics thatare used for food ...

Nov. 1, 2007

Ion Mobility Mass Spectrometry – Catch the Excitement!

Interest in ion mobility mass spectrometry (IMS) technology is growing rapidly. The signs are everywhere. Since the year 2000, the number of abstracts submitted to ASMS mentioning ion mobility has grown more than 10-fold – from 30 to more than 350 in 2015. For most of that time, ion mobility has been available commercially in high-end research instruments or in homemade platforms. Waters ...

Mar. 10, 2016

By Waters Corporation

Biosorption of strontium ion by immobilised Aspergillus niger

Biosorption of strontium by Aspergillus niger immobilised in calcium alginate has been studied. The experimental data showed that immobilised A. niger was effective in removing Sr2+ from aqueous solution. The optimal pH and temperature were 3.0LC and 25LC, respectively. Pseudo second-order model was applicable to all the sorption data over the entire time range. Intraparticle diffusion was not ...

May 14, 2009

By Inderscience Publishers

Water analysis

A complete tap water analysis includes the determination of the pH value, the alkalinity and the total water hardness. Both the pH measurement and the pH titration by means of a standard pH electrode suffer from several drawbacks. First, the response time of several minutes is too long and, above all, the stirring rate significantly influences the measured pH value. Unlike these standard pH ...

Feb. 10, 2008

By Metrohm AG

CO2 adsorption over ion-exchanged zeolite beta with alkali and alkaline earth metal ions

The need to reduce anthropogenic CO2 emissions has been the driving force to consider new approaches and novel ideas for CO2 management, and carbon capture and storage (CCS) are considered to potentially be the most effective means to alleviate the problem. The most common method for CO2 capture is via gas absorption, with monoethanol amine (MEA) being the most widely used solvent. The current ...

Mar. 12, 2012

By Hiden Analytical Ltd.

Determining Nitrate and Nitrite Sequentially Using a Nitrite Ion Selective Electrode

ABSTRACT Reliable analysis for NO3- and NO2- contained in wastewater, soils and reclaimed water is extremely important as these constituents can easily leach into ...

May 22, 2007

Aggregation of stabilized TiO2 nanoparticle suspensions in the presence of inorganic Ions

The present study aims to evaluate the effect of inorganic ions on the aggregation kinetics of stabilized titanium dioxide (TiO2) nanoparticle (NP) suspension, an NP mode widely used in consumer goods and in aquatic environments. The point of zero charge of stabilized TiO2 NPs was approximately pH 6.5. The particle size of the stabilized TiO2 NP suspensions increased with the increase in salt ...

May 25, 2012

By John Wiley & Sons, Ltd.

Room-temperature synthesis and characterisation of ion-induced iron-carbon nanocomposite fibres

Graphite plates were Ar+ ion-irradiated with and without a simultaneous Fe supply at room temperature. The surfaces ion-irradiated without an Fe supply were covered with densely distributed conical projections with a carbon nanofibre (CNF) on the top. The CNFs thus grown were 20-50 nm in diameter and 0.3-2 µm in length. By contrast, the graphite surfaces ion-bombarded with a simultaneous Fe ...

May 20, 2009

By Inderscience Publishers

Optimising next-generation lithium ion batteries with infrared spectroscopy

Lithium batteries have become the mainstay of modern portable electronics, providing a reliable power source to run mobile phones, laptop computers and electric vehicles. Lithium technology is now even being developed on a large scale to provide electricity storage to supplement the National Grid during peak demand [1]. The issue with lithium batteries remains the same – energy density ...

Sep. 6, 2016

By Specac Limited

Hydrogen ion sensing characteristics of IGZO/Si electrode in EGFET

In–Ga–Zn–O (IGZO) was widely applied in the substrate of TFT to replace α–Si in recent years. In this study, IGZO layer with thickness of 70 nm is firstly proposed as a pH–sensing membrane directly deposited on P–type Si substrate acting as an extended gate of conventional extended–gate field–effect transistor (EGFET). Post–deposition rapid thermal anneal (RTA) was performed to improve pH sensing ...

Mar. 17, 2014

By Inderscience Publishers

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