Potentiometric analytical microsystem based on the integration of a gas-diffusion step for on-line ammonium determination in water recycling processes in manned space missions

Calvo-López, Antonio; Ymbern, Oriol; Puyol, Mar; Casalta, Joan Manel; Alonso-Chamarro, Julián

doi:10.1016/j.aca.2014.12.038

Cited by 23 publications

(18 citation statements)

References 32 publications

(48 reference statements)

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“…Although PM is the most commonly used platform for performing environmental applications, there are a few examples of CFM devices being used for this purpose. For example, Calvo‐Lopez et al developed a credit‐card‐sized CFM platform ( Figure a) for the potentiometric determination of ammonium ions from water samples (CFM, SP). Reagents and samples were injected into the device via a peristaltic pump and six‐way injection valve, delivered through the microchannels to a polyvinylidene fluoride (PVDF) gas diffusion membrane, and ammonium ions were detected potentiometrically using an ammonium selective working electrode.…”

Section: Environmental Applicationsmentioning

confidence: 99%

“…Reagents and samples were injected into the device via a peristaltic pump (P) and six‐way injection valve (V), delivered through the microchannels (red), and through the polyvinylidene fluoride (PVDF) membrane (blue), where they were detected potentiometrically and carried to the waste outlet (W). Reproduced with permission . Copyright 2015, Elsevier.…”

Section: Environmental Applicationsmentioning

confidence: 99%

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Printed Microfluidics

Dixon

Lamanna

Wheeler

2017

Adv Funct Materials

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Microfluidics has become an important tool that is useful for a wide range of applications. A drawback for microfluidics is that many of the techniques that are commonly used to fabricate devices are not widely accessible, not scalable to high‐volume manufacturing processes, or both. Recently, a number of printing strategies that were originally developed for other applications have been applied to microfluidic device fabrication. These techniques, which include inkjet printing (IJP), screen printing (SP), and solid wax printing (SWP), are proposed to have a transformative effect on the field. Here microfluidics and printing, are introduced and a list of favorite examples is provided that highlights the accessibility and scalability that the combination is bringing to the field.

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Section: Environmental Applicationsmentioning

confidence: 99%

Section: Environmental Applicationsmentioning

confidence: 99%

Printed Microfluidics

Dixon

Lamanna

Wheeler

2017

Adv Funct Materials

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“…Apart from its simplicity, rapidity, and accuracy, spectrophotometry is liable to be involved in the microfluidic chip (MC) aiming at multicomponent detection [2,3]. Compared to the MC which uses the electrode for detection (another common technique) [4,5], the MC using the spectrophotometry has a more simplified structure and would not suffer from the electrode degeneration or other electrode-related problems. But spectrophotometry is easy to be interfered with for the reason that the indicator may react with other components, especially those which have similar chemical construction [6].…”

Section: Introductionmentioning

confidence: 99%

A Reversible Spectrophotometric Method Based on a Coupled Microfluidic Chip for Highly Selective Ammonium Detection

Zhou

Song

Yang

2019

Journal of Chemistry

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A coupled chip aiming at economical and highly selective ammonium detection was fabricated. It consisted of a reaction chip, a gas-diffusion chip, and a detection chip. Zinc tetraphenylporphyrin dyed on the cation-exchange resin microbeads was used as the indicating material to avoid excess consumption for its reversibility. PDMS was selected as the material of the gas-diffusion membrane. A portable spectrometer was applied for spectrum analysis. By analysis of spectrum change, the high selectivity was confirmed because no component had interference on detection effect. Good performance was shown for all the tested concentrations (0.2–50 mg·L−1). The stability and reversibility were also judged by the spectrum data obtained from the indicating process and the recovering process. Finally, real samples containing ammonium were tested and the results were compared to those came from a standard method to confirm the accuracy of our method.

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“…Methods for determination of NH 4 + are mainly based on spectrophotometry , fluorometry , chemiluminescence , conductometry , potentiometry , and amperometry . DIP is predominantly determined by LC , the most commonly employed technique for pharmaceuticals analysis, and some CE methods .…”

Section: Introductionmentioning

confidence: 99%

“…Medications containing DIP and NH 4 + are popular and widely consumed, and, therefore, a method for the determination of both compounds in a single run is highly desirable. Methods for determination of NH 4 + are mainly based on spectrophotometry [6][7][8], fluorometry [9], chemiluminescence [10,11], conductometry [12,13], potentiometry [14,15], and amperometry [16][17][18][19]. DIP is predominantly determined by LC [20][21][22][23][24], the most commonly employed technique for pharmaceuticals analysis, and some CE methods [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast capillary electrophoresis method for the simultaneous determination of ammonium and diphenhydramine in pharmaceutical samples

Costa

Marra

Oliveira

et al. 2018

J of Separation Science

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Ammonium and diphenhydramine are active ingredients commonly found in the same pharmaceutical preparations. We report, for the first time, a sub-minute method for the simultaneous determination of ammonium and diphenhydramine. The method is based on capillary electrophoresis with capacitively coupled contactless conductivity detection. Both analytes can be quantified in a single run (∼80 injections/h) using 30 mmol/L 2-(N-morpholino)ethanesulfonic acid and 15 mmol/L lithium hydroxide (pH 6.0) as background electrolyte. The separation by capillary electrophoresis was achieved on a fused-silica capillary (50 cm total length, 10 cm effective length, and 50 μm inside diameter). The limits of detection were 0.04 and 0.02 mmol/L for ammonium and diphenhydramine, respectively. The proposed method also provided adequate recovery values for spiked samples (100-106 and 97-104% for ammonium and diphenhydramine, respectively). The results obtained with the new capillary electrophoresis method were compared with those of the high-performance liquid chromatography method for diphenhydramine and the Kjeldahl method for ammonium and no statistically significant differences were found (95% confidence level).

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Potentiometric analytical microsystem based on the integration of a gas-diffusion step for on-line ammonium determination in water recycling processes in manned space missions

Cited by 23 publications

References 32 publications

Printed Microfluidics

Printed Microfluidics

A Reversible Spectrophotometric Method Based on a Coupled Microfluidic Chip for Highly Selective Ammonium Detection

Ultrafast capillary electrophoresis method for the simultaneous determination of ammonium and diphenhydramine in pharmaceutical samples

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