Ion Chromatography Articles on Environmental XPRT

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

Opt for the easy way: Determining glycerol in biodiesel using ion chromatography

Current US and European standards stipulate gas chromatography to determine the glycerol content in biodiesel. However, this method is both tedious and rather expensive. Metrohm recommends ion chromatography (IC) as a simple, cost-efficient and highly accurate ...

Mar. 3, 2009

By Metrohm AG

Chromatography in Sugar Processing

Untitled Document Chromatography is a new process to most sugar technologists, yet it is fast becoming a tool of significance for ...

Sep. 1, 1999

By Calgon Carbon Corporation

Ion chromatography as highly suitable method for rapid and accurate determination of antibiotic fosfomycin in pharmaceutical wastewater

A rapid and accurate ion chromatography (IC) method (limit of detection as low as 0.06 mg L−1) for fosfomycin concentration determination in pharmaceutical industrial wastewater was developed. This method was compared with the performance of high performance liquid chromatography determination (with a high detection limit of 96.0 mg L−1) and ultraviolet spectrometry after ...

May 20, 2014

By IWA Publishing

Direct injection ion chromatography for the control of chlorinated drinking water: simultaneous estimation of nine haloacetic acids and quantitation of bromate, chlorite and chlorate along with the major inorganic anions

Most methods for the analysis of haloacetic acids published in recent years are based on ion chromatography with direct injection, employing a gradient elution with potassium hydroxide (KOH). This work reports the exploration of an alternative eluent, a buffer of sodium carbonate/sodium hydrogen carbonate, aimed at the simultaneous analysis of nine haloacetic acids along with bromate, chlorite ...

Sep. 25, 2014

By IWA Publishing

What’s the big deal about ion mobility mass spectrometry?

Ion mobility spectrometry (IMS) is a technique that differentiates ions based on their size, shape, charge, and mass. While often used in small, portable devices at airports and remote locations for rapidly detecting small molecules whose mobility is known (for example, certain narcotics and explosives) when coupled with liquid chromatography-mass spectrometry (LC/MS), IMS provides an orthogonal ...

Apr. 29, 2016

By Waters Corporation

Determination of hemoglobin adduct of a musk xylene metabolite in trout as biomarker of exposure by gas chromatography mass spectrometry

Musk xylene (MX) is frequently used as fragrances in formulation of personal care products. Quantification of a bound 4-amino-MX(4-AMX) as cysteine adducts in trout hemoglobin (Hb) was made by gas chromatography-ion trap-mass spectrometry (GC/MS). The Hb samples were collected from trout after 24 h exposure to MX at 10µg/g, and or menhaden oil (control). The formation of cysteine-Hb adduct was ...

Feb. 28, 2007

By IOS Press

Proficiency test of non-target screening with gas chromatography mass spectrometry to confirm a detected contamination of raw and drinking water

Much of the water supply industry has implemented online monitoring and warning systems for chemical or biological contaminations. When a contamination is detected, further investigations are necessary to confirm or to cancel the initial alarm. The proficiency of a non-target screening approach with solid phase extraction and GCMS in full-scan mode was examined. A selection of pesticides and ...

Dec. 1, 2010

By IWA Publishing

Chloride ions promoted the catalytic wet peroxide oxidation of phenol over clay-based catalysts

Catalytic wet peroxide oxidation (CWPO) of phenol over clay-based catalysts in the presence and absence of NaCl was investigated. Changes in the H2O2, Cl−, and dissolved metal ion concentration, as well as solution pH during phenol oxidation, were also studied. Additionally, the intermediates formed during phenol oxidation were detected by liquid chromatography-mass ...

Nov. 7, 2015

By IWA Publishing

Determination of VOCs in water using static headspace GC/MS with simultaneous full scan and selective ion recording

The combination of static headspace sample introduction and gas chromatography/mass spectrometry (HS/GC/MS) provides the analyst with a powerful, fully automated technique for the determination of trace volatile organic compounds (VOCs) in water. Samples may be hermetically sealed in the headspace vial at the point of sampling. This approach avoids errors due to glassware cross-contamination and ...

Oct. 28, 2011

By PerkinElmer, Inc.

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.

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)

Ozone degradation of chloramphenicol: efficacy, products and toxicity

The present work investigated the ozonation of chloramphenicol (CAP). Aqueous CAP was effectively removed by ozonation. The reaction intermediates or products were identified by liquid chromatography/mass spectrometry and ion chromatography. A possible degradation scheme was proposed based on the detected products. The change of antibiotic activity and acute toxicity of reaction mixtures was ...

Jun. 11, 2012

By Inderscience Publishers

Determining saccharidic tracers in atmospheric aerosols

Atmosperic aerosols have a strong impact on the climate. Within the organic aerosol fraction, anhydrosugars and sugar alcohols are valuable tracers for biomass burning and biogenic sources. They are best determined by ion chromatography coupled to pulsed amperometric detection. Sample preparation merely involves a simple waterextraction. Detection limits are in the ng/m3 ...

Oct. 18, 2010

By Metrohm AG

Decolorization of azo dye C.I. Reactive Black 5 by ozonation in aqueous solution: influencing factors, degradation products, reaction pathway and toxicity assessment

In this study, ozonation treatment of C.I. Reactive Black 5 (RB5) was investigated at various operating parameters. The results showed that the aqueous solution initially containing 200 mg/L RB5 was quickly decolorized at pH 8.0 with an ozone dose of 3.2 g/h. Reaction intermediates with m/z 281, 546, 201, 350, 286 and 222 were elucidated using liquid chromatography-mass spectrometry, while ...

Dec. 17, 2015

By IWA Publishing

Fenton degradation of Cartap hydrochloride: identification of the main intermediates and the degradation pathway

The advanced oxidation of Cartap hydrochloride (Cartap) promoted by the Fenton system in an aqueous medium was investigated. Based on total organic carbon, chemical oxygen demand and high-performance liquid chromatography, the oxidation of Cartap is quite efficient by the Fenton system. Its long chain is easily destroyed, but the reaction does not proceed to complete mineralization. Ion ...

Jun. 29, 2015

By IWA Publishing

Fenton degradation of Cartap hydrochloride: identification of the main intermediates and the degradation pathway

The advanced oxidation of Cartap hydrochloride (Cartap) promoted by the Fenton system in an aqueous medium was investigated. Based on total organic carbon, chemical oxygen demand and high-performance liquid chromatography, the oxidation of Cartap is quite efficient by the Fenton system. Its long chain is easily destroyed, but the reaction does not proceed to complete mineralization. Ion ...

Jun. 29, 2015

By IWA Publishing

Thermal lens spectrometric determination of ammonium in water samples based on indophenol formation with sodium salicylate

For the first time, a thermal lens spectrometric (TLS) detection was applied for the determination of ammonium based on indophenol blue reaction. The blue–coloured indophenol was detected following excitation by a krypton laser at 647 nm. The achieved limit of detection (LOD) and limit of quantification (LOQ) were 8 ng/mL and 25 ng/mL, respectively. This represents an improvement of 20 times when ...

Feb. 9, 2015

By Inderscience Publishers

Reducing Product Manufacturing Costs Through the Use of a Simple and Flexible Moving Bed Process

Untitled Document Traditionally, the chemical engineer can rely on chemical separation methods such as distillation, crystallization, ...

Oct. 24, 2001

By Calgon Carbon Corporation

Photolytic degradation of chlorophenols from industrial wastewaters by organic oxidants peroxy acetic acid, para nitro benzoic acid and methyl ethyl ketone peroxide: identification of reaction products

In this investigation, chlorophenol (CP) containing industrial wastewater was remediated by ultraviolet irradiation in conjunction with organic oxidants, peroxy acetic acid (PAA); para nitro benzoic acid (PNBA); and methyl ethyl ketone peroxide (MEKP). CP mineralization was studied with regard to chemical oxygen demand (COD) and chloride ion release under identical test conditions. COD depletion ...

Mar. 19, 2014

By IWA Publishing

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