Ultrasound-assisted purge-and-trap extraction for simultaneous determination of low-molecular weight amines and ammonium in high salinity waters by ion chromatography

Ferreira, Fabienne Antunes; Afonso, Júlio Carlos; Pontes, Fernanda Veronesi Marinho; Carneiro, Manuel Castro; Neto, Arnaldo Alcover; Escalfoni, Rainério; Monteiro, Maria Inês Couto

doi:10.1016/j.microc.2017.03.006

Cited by 12 publications

(3 citation statements)

References 33 publications

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“…6 The determination of aN is indeed the primary task of water quality management and water source protection. At present, several methods including spectroscopy (e.g., colorimetry and fluorometry), 7,8 chromatography, 9 titrimetry, 10 and electrochemistry, have been reported for the quantitative analysis of aN. The instruments used in the first two techniques are relatively expensive to acquire and maintain, and too bulky to leave a laboratory.…”

Section: Introductionmentioning

confidence: 99%

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

Qin,

Zhang,

et al. 2023

ACS Appl. Nano Mater.

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As a common water pollutant, ammonia nitrogen (aN) has adverse effects on human life and production. Therefore, it is of great significance to realize the precision prevention of aN. Here, gold nanoparticle (AuNP)-modified carbon cloth (CC) electrodes were prepared for aN detection using cyclic voltammetry (CV). The first electrode was synthesized by in situ loading of AuNPs on the flexible CC (AuNPs/CC), and the second electrode was obtained by deposition of graphene coating on this basis (AuNPs/CC@G). Their selective response to aN was attributed to the formation and transformation of the gold ammonia complex through the electrodissolution of AuNPs. Two electrodes had a wide quantitative range (0.001−10000 μM); meanwhile, the limits of detection (LoDs) were down to the nanomolar level. From the aN standard to a real water sample, both nanocomposite electrodes also exhibited excellent sensing performance in the aspect of anti-interference, reusability, reproducibility, stability, and recovery. In the simultaneous comparison, the superior results of AuNPs/CC@G have confirmed the realization of optimization, which provided an innovative solution for the efficient and accurate monitoring of aN in water.

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Section: Introductionmentioning

confidence: 99%

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

Qin,

Zhang,

et al. 2023

ACS Appl. Nano Mater.

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“…18,19 This potentially complicates the analysis, decreasing sample throughput, increasing the likelihood of sample loss and potentially increasing the complexity of the sample through incomplete or side reactions. Ion chromatography (IC) has widely been used for the analysis of amines for over four decades, [20][21][22][23][24][25][26] most frequently with conductivity detection, but amperometric detection has also been used. [27][28][29] Previous work has been reported where IC has been interfaced to MS. [30][31][32] The use of MS provided increased selectivity to overcome co-elution, and also increased sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Towards a generic method for ion chromatography/mass spectrometry of low‐molecular‐weight amines in pharmaceutical drug discovery and development

Lewis

Jackson

Crampton

et al. 2020

Rapid Comm Mass Spectrometry

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Rationale Low‐molecular‐weight amines are encountered in pharmaceutical analysis, e.g. as reactants in chemical syntheses, but are challenging to analyse using ultrahigh‐performance liquid chromatography/mass spectrometry (UHPLC/MS) due to their high polarity causing poor retention. Ion chromatography/mass spectrometry (IC/MS) is an emerging technique for polar molecule analysis that offers better separation. A generic IC/MS method would overcome problems associated with using UHPLC/MS in drug discovery and development environments. Methods Amine standards were analysed using IC/MS with gradient elution (variety of column temperatures evaluated). An electrospray ionisation (ESI) quadrupole mass spectrometer was operated in positive ion polarity in scanning mode. The make‐up flow composition was evaluated by assessing the performance of a range of organic modifiers (acetonitrile, ethanol, methanol) and additives (acetic acid, formic acid, methanesulfonic acid). The ESI conditions were optimised to minimise adduct formation and promote generation of protonated molecules. Results The performance attributes were investigated and optimised for low‐molecular‐weight amine analysis. Organic solvents and acidic additives were evaluated as make‐up flow components to promote ESI, with 0.05% acetic acid in ethanol optimal for producing protonated molecules. The hydrogen bonding capability of amines led to abundant protonated molecule–solvent complexes; optimisation of source conditions reduced these, with collision‐induced dissociation voltage having a strong effect. The detection limit was ≤1.78 ng for the amines analysed, which is fit‐for‐purpose for an open‐access chemistry environment. Conclusions This study demonstrates the value of IC/MS for analysing low‐molecular‐weight amines. Good chromatographic separation of mixtures was possible without derivatisation. Ionisation efficiency was greatest using a make‐up flow of 0.05% acetic acid in ethanol, and optimisation of ESI source conditions promoted protonated molecule generation for easy determination of molecular weight.

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“…Therefore, the mobile phase of IEC received much attention. To effectively elute divalent ions, different mobile phases (tartaric acid, ethylenediamine , citric acid, methanesulfonic acid, nitric acid , as well as pyridinedicarboxylic acid ) and high concentration acids were selected. These high concentration acids could effectively elute divalent cations, but could also lead to background noise, high LOD, and poor separation of monovalent cations .…”

Section: Introductionmentioning

confidence: 99%

Use of Ionic liquids as additives in ion exchange chromatography for the analysis of cations

Zhu

2017

J of Separation Science

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The behavior of acids (citric acid, nitric acid, oxalic acid, tartaric acid) as a mobile phase and imidazolium ionic liquids (the bromides, tetrafluoroborates and hexafluorophosphates of 1-ethyl, 1-butyl, and 1-hexyl-3-methylimidazolium) as additives in ion exchange chromatography for cations (Na , K , Mg , Ca ) separation were studied. The results showed that nitric acid and 1-hexyl-3-methyl-imidazolium hexafluorophosphate offered the most interesting features in the separation of cations, such as lower retention time and better resolution. The selected optimal conditions were achieved by adding 0.10 mM 1-hexyl-3-methyl-imidazolium hexafluorophosphate in 4.0 mM HNO mobile phase for the separation of four cations with the flow rate of 0.9 mL/min at room temperature (25°C). The linear regression equations of Na , K , Mg , Ca were S = 4.4763c + 0.0209, S = 3.8903c - 0.0087, S = 6.3974c - 0.0173, and S = 7.601c - 0.0339 and the limits of detection of Na , K , Mg , Ca were 0.296, 4.98, 0.0970, and 1.22 μg/L, respectively. In this work, four cations in samples were successfully detected.

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Ultrasound-assisted purge-and-trap extraction for simultaneous determination of low-molecular weight amines and ammonium in high salinity waters by ion chromatography

Cited by 12 publications

References 33 publications

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

Towards a generic method for ion chromatography/mass spectrometry of low‐molecular‐weight amines in pharmaceutical drug discovery and development

Use of Ionic liquids as additives in ion exchange chromatography for the analysis of cations

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