Separation and determination of traces of ammonia in air by means of chromatomembrane cells

Löffler, P.; Simon, Jürgen; Katruzov, A. N.; Москвин, Л. Н.

doi:10.1007/bf00323090

Cited by 16 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…At first investigations started with the absorption of ammonia from loaded air into an aqueous phase and the electrochemical detection of the pH-shift [22]. For a better adaption to the requirements of gas analysis the “three-hole”-cell was constructed as discussed above.…”

Section: Application In Analytical Chemistrymentioning

confidence: 99%

Gas/Liquid and Liquid/Liquid Solvent Extraction in Flow Analysis with the Chromatomembrane Cell

Москвин

Simon

2006

Sensors

View full text Add to dashboard Cite

Abstract:Since twelve years the Chromatomembrane Cell has been proposed as a new and versatile device for extraxtion procedures in the flow based analysis. In the meantime a remarkable number of papers was submitted dealing with applications of the novel method to all the conceivable varieties of flow injection and sequential injection analysis. The device supports important analytical procedures such as sampling, sample preparation, and preconcentration each being combined with a phase transfer of the analyte. The Chromatomembrane Cell can be coupled to most of the modern detectors which work computer aided in the laboratories of today. Centrepiece of the cell is a block made from biporous hydrophobic PTFE, inside which polar (in the macropores) and nonpolar (in the micropores) solvents come into a close contact with each other and might flow independently with different flow rates. Microporous PTFE membranes prevent polar phases from their flowthrough into directions which are reserved for nonpolar fluids only. Thus, a strict control over the fluxes can be established at the analysts request. Especially, that PTFE block offers outstanding possibilities as a sampling unit for air monitoring.

show abstract

Section: Application In Analytical Chemistrymentioning

confidence: 99%

Gas/Liquid and Liquid/Liquid Solvent Extraction in Flow Analysis with the Chromatomembrane Cell

Москвин

Simon

2006

Sensors

View full text Add to dashboard Cite

show abstract

“…Esse eletrodo funcionou bem em ambos os procedimentos e o limite de detecção na fase aquosa foi de 0,085 ppm e na fase gasosa, 8,5 ppm. Um método foi desenvolvido para separar traços de amônia do ar por meio de uma membrana, com subseqüente determinação potenciométrica 113 . O sistema de medida respondeu proporcionalmente para a concentração de amônia na fase gasosa e tempo de pré-concentração.…”

Section: Métodos Para Determinação Da Amônia Atmosféricaunclassified

Amônia (NH3) atmosférica: fontes, transformação, sorvedouros e métodos de análise

Felix

Cardoso

2004

Quím. Nova

View full text Add to dashboard Cite

“…[94][95][96][97][98][99][100][101][102][103][104] It was proposed by Moskvin and Simon, and is called a chromatomembrane cell (CMC). The CMC does have a membrane, and the gas is collected into a very small amount of the solution as same as the microchannel scrubber.…”

Section: ·9 Chromatomembrane Cellmentioning

confidence: 99%

Trends in Atmospheric Trace Gas Measurement Instruments with Membrane-based Gas Diffusion Scrubbers

Toda

2004

ANAL. SCI.

View full text Add to dashboard Cite

A diffusion scrubber (DS) is an excellent tool for gas analysis, and there are many types of DS devices, varying both in structure and construction. In this paper, recent work on atmospheric trace gas measurements by means of DS devices are reviewed. Theoretical considerations on representative DSs are summarized first. Then, the characteristics of the key material, a gas-diffusion membrane, are discussed, and recent improvements and novel scrubbers for highly effective collection are outlined. A chromatograph is a suitable tool for the multi-gas analysis of collected species. On the other hand, solid-state fluorescence/absorbance detectors have been developed for the continuous measurement of target gases. The methods based on DS collection and subsequent detection have high sensitivities, and the detection limits can be in the low-pptv levels. Accordingly, they are capable of measuring background levels, and detecting very low levels of contaminants in a cleanroom. Miniaturized advanced DS units, perhaps the next generation of DS devices, are introduced at the end of this review. DS systems have contributed significantly to our knowledge of the atmospheric dynamics and atmospheric chemistry.

show abstract

Separation and determination of traces of ammonia in air by means of chromatomembrane cells

Cited by 16 publications

References 3 publications

Gas/Liquid and Liquid/Liquid Solvent Extraction in Flow Analysis with the Chromatomembrane Cell

Gas/Liquid and Liquid/Liquid Solvent Extraction in Flow Analysis with the Chromatomembrane Cell

Amônia (NH3) atmosférica: fontes, transformação, sorvedouros e métodos de análise

Trends in Atmospheric Trace Gas Measurement Instruments with Membrane-based Gas Diffusion Scrubbers

Contact Info

Product

Resources

About