Determination of trace anions in high-nitrate matrices by ion chromatography

Kaiser, Edward; Rohrer, Jeffrey S.; Jensen, Detlef

doi:10.1016/s0021-9673(01)00699-9

Cited by 25 publications

(6 citation statements)

References 4 publications

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“…It could be supposed that analyte losses could occur or the determination techniques could suffer interferences in acid media, as reported in the literature. [12][13][14][15][16][17] With concern for the water extraction in closed vessels, its use was not effective for Cl extraction from VR and agreement with MIC results was lower than 30%. Similar results were found for the BCR 181 sample.…”

Section: Chlorine Determination By Icp-oes and Ic In Vrsmentioning

confidence: 99%

“…However, in this system, where the use of concentrated acids is commonly required, the blank values can be relatively high. In addition, the presence of high acid concentrations in the digests cannot be supported by some analytical techniques, such as inductively coupled plasma−optical emission spectrometry (ICP−OES) and ion chromatography (IC), and a subsequent step could be necessary to remove (or dilute) the acid excess. − In this sense, if a sample preparation system could allow us to obtain a convenient solution for chlorine determination using different techniques (e.g., ICP−OES and IC), it should be advantageous for routine Cl determination in complex samples, such as VR. In this respect, combustion techniques are particularly suitable to decompose organic materials with high carbon content because of the high temperature achieved .…”

Section: Introductionmentioning

confidence: 99%

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Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Pereira¹,

Mello²,

Duarte³

et al. 2009

Energy Fuels

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The microwave-induced combustion (MIC) method was applied for digestion of crude oil vacuum distillation residue for further chlorine determination. Ignition was performed by microwave radiation using a microwave oven designed for conventional pressurized wet digestion. Combustion was carried out using 20 bar of oxygen and NH 4 NO 3 as the igniter. Water or H 2 O 2 , Na 2 CO 3 , and (NH 4 ) 2 CO 3 solutions were investigated for analyte absorption as well as the necessity of a reflux step. Digests were suitable to be analyzed by inductively coupled plasma optical emission spectrometry and ion chromatography. Accuracy was evaluated using spiked samples and certified reference materials of coal (BCR 181) and fuel oil (NIST 1634c). Recoveries for Cl were in the range of 98.4-100.2% for all investigated solutions using the reflux step. The agreement with certified values was better than 95% using 25 mmol L -1 (NH 4 ) 2 CO 3 as the absorbing solution and reflux step. Poor recoveries for Cl were observed using microwave-assisted wet digestion and water extraction procedures. Residual carbon content for MIC was below 1%, whereas it was about 20% using microwave-assisted wet digestion. Using MIC, up to 400 mg of sample could be decomposed and digestion was complete in less time (5 min for combustion and 20 min for cooling) in comparison to other conventional procedures (more than 1 h). Up to eight samples could be digested simultaneously, making the proposed procedure suitable for further routine Cl determination in oil refineries.

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Section: Chlorine Determination By Icp-oes and Ic In Vrsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Pereira¹,

Mello²,

Duarte³

et al. 2009

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…The Dionex Corporation have in the past few years developed a number of new products specifically designed for certain applications. [22][23][24]55,56,147,148,[150][151][152][153][154][155] The company recently released the so-called 'hydroxide selective' IonPac AS16 column, specifically for the determination of polarisable anions such as perchlorate, iodide, thiocyanate and thiosulfate, using NaOH or KOH only eluents. The resin itself is a high capacity macroporous 9 mm diameter EVB-DVB substrate with a surface coverage of 65 nm diameter latex particles functionalised with very hydrophilic alkanol quarternary ammonium groups.…”

Section: New Selectivity In Commercial Anion Exchangersmentioning

confidence: 99%

Novel ion chromatographic stationary phases for the analysis of complex matrices

Paull

Nesterenko

2005

Analyst

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Ion chromatography (IC) has a proven track record in the determination of inorganic and organic anions and cations in complex matrices. Recently, application of IC to the separation and determination of bio-molecules such as amino acids, carbohydrates, nucleotides, proteins and peptides has also received much attention. The key to the determination of all of the above species in the most analytically challenging complex matrices is the ability to manipulate selectivity through control of stationary phase chemistry, mobile phase chemistry and the choice of detection method. This Tutorial Review summarises some of the most significant recent advances made in IC stationary phase technology. In particular, the review details stationary phases specifically designed for ion analysis in complex sample matrices, and considers in which direction future stationary phase development might proceed.

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“…In addition, the use of large injection volumes or more concentrated samples is possible. Kaiser et al [10] described the application of high-capacity anion exchange columns for the determination of trace anions in a matrix containing a high concentration of nitrate ions. Limits of detection for chloride, phosphate and sulphate were around 150 g/l for the solution, not for the acid representing the matrix.…”

Section: Introductionmentioning

confidence: 99%

Coupled ion chromatography for the determination of chloride, phosphate and sulphate in concentrated nitric acid

Biesaga

Schmidt

Seubert

2004

Journal of Chromatography A

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Determination of trace anions in high-nitrate matrices by ion chromatography

Cited by 25 publications

References 4 publications

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Novel ion chromatographic stationary phases for the analysis of complex matrices

Coupled ion chromatography for the determination of chloride, phosphate and sulphate in concentrated nitric acid

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