Continuous and simultaneous determination of anions and cations in rainwater by ion chromatography

Xu, Qun; Zhang, Wen; Xu, Chun; Jin, Litong

doi:10.1039/b000872i

Cited by 14 publications

(6 citation statements)

References 24 publications

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“…90 The limit of linearity was extended by adding 5 mM DL-malic acid to the eluent that comprised MeOHwater (50 : 50, v/v). 91 A totally aqueous mobile phase was employed by Ding et al to separate these ions with a signicant decrease in their retention times by using 1.6 mM pyridine-2,6-dicarboxylic acid and 8.0 mM 18-crown-6 as an eluent. 92 Less band broadening for the divalent cations (Mg 2+ and Ca 2+ ) was observed when 1.25 mM sulfosalicylic acid was added to the mobile phase instead of tartaric acid.…”

Section: Merits and Demerits Of Mmlcmentioning

confidence: 99%

Multimodal liquid chromatography of small molecules

Mansour

Danielson

2013

Anal. Methods

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Section: Merits and Demerits Of Mmlcmentioning

confidence: 99%

Multimodal liquid chromatography of small molecules

Mansour

Danielson

2013

Anal. Methods

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“…Some attempts of simultaneous inorganic nitrogen speciation analysis have been made. Ion exclusion cation exchange chromatography for simultaneous separation of common inorganic anions and cations (including nitrogen) was applied by a few analysts , but only Xu et al. described a separation of the three ionic species of nitrogen, while the others succeeded only in the separation of NO 3 – and NH 4 + .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous speciation analysis of inorganic nitrogen with the use of ion chromatography in highly salinated environmental samples

Kurzyca

Niedzielski

Frankowski

2016

J of Separation Science

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We present the development of a method for the simultaneous determination of inorganic nitrogen species in oxidized (NO2 (-) , NO3 (-) ) and reduced (NH4 (+) ) forms using ion chromatography with diode-array detection (205, 208, and 425 nm, respectively). The oxidized forms were determined directly after the separation in the anion exchanger, while the reduced form was determined in the column hold-up time after derivatization with the Nessler reagent. The use of an appropriate modifier (Seignette reagent) and mobile phase (NaCl) enabled the determination of inorganic nitrogen species in highly salinated environmental samples (water, sediments). Moreover, low detection limits were obtained of 0.04 mg/L for NH4 (+) and 0.006 and 0.005 mg/L for NO2 (-) and NO3 (-) , respectively. The analysis of environmental samples indicated NH4 (+) contents of up to 1161 ± 47 mg/kg and NO3 (-) of up to 148 ± 6 mg/kg for sediment samples, as well as the NH4 (+) concentrations of up to 0.98 ± 0.10 mg/L, NO2 (-) of up to 24 ± 1 mg/L and NO3 (-) of up to 20 ± 1 mg/L for water samples.

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“…Moreover these methods use reagents and expensive columns that must be periodically cleaned and calibrated as their performances change with time. These technical requirements unfortunately did not permit a routine and in situ or at site use of these procedures [ 9 – 11 ].…”

Section: Introductionmentioning

confidence: 99%

An Electronic Tongue Designed to Detect Ammonium Nitrate in Aqueous Solutions

Campos

Pascual

Soto

et al. 2013

Sensors

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An electronic tongue has been developed to monitor the presence of ammonium nitrate in water. It is based on pulse voltammetry and consists of an array of eight working electrodes (Au; Pt; Rh; Ir; Cu; Co; Ag and Ni) encapsulated in a stainless steel cylinder. In a first step the electrochemical response of the different electrodes was studied in the presence of ammonium nitrate in water in order to further design the wave form used in the voltammetric tongue. The response of the electronic tongue was then tested in the presence of a set of 15 common inorganic salts; i.e.; NH4NO3; MgSO4; NH4Cl; NaCl; Na2CO3; (NH4)2SO4; MgCl2; Na3PO4; K2SO4; K2CO3; CaCl2; NaH2PO4; KCl; NaNO3; K2HPO4. A PCA plot showed a fairly good discrimination between ammonium nitrate and the remaining salts studied. In addition Fuzzy Art map analyses determined that the best classification was obtained using the Pt; Co; Cu and Ni electrodes. Moreover; PLS regression allowed the creation of a model to correlate the voltammetric response of the electrodes with concentrations of ammonium nitrate in the presence of potential interferents such as ammonium chloride and sodium nitrate.

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Continuous and simultaneous determination of anions and cations in rainwater by ion chromatography

Cited by 14 publications

References 24 publications

Multimodal liquid chromatography of small molecules

Multimodal liquid chromatography of small molecules

Simultaneous speciation analysis of inorganic nitrogen with the use of ion chromatography in highly salinated environmental samples

An Electronic Tongue Designed to Detect Ammonium Nitrate in Aqueous Solutions

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