Development and validation of a methodology for quantifying parts-per-billion levels of arsine and phosphine in nitrogen, hydrogen and liquefied petroleum gas using a variable pressure sampler coupled to gas chromatography-mass spectrometry

Hernández‐Fernández, Joaquín; López‐Martínez, Juan; Barceló, Damià

doi:10.1016/j.chroma.2020.461833

Cited by 22 publications

(25 citation statements)

References 20 publications

(31 reference statements)

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“…The volume varied between 0.25 and 1.0 mL depending on the circuit of each valve. The oven was started at 40 °C × 3 min, increased to 60 °C at 10 °C min −1 for four minutes, and increased again to 170 °C at 35 °C min −1 [ 35 ].…”

Section: Methodsmentioning

confidence: 99%

Experimental Study of the Impact of Trace Amounts of Acetylene and Methylacetylene on the Synthesis, Mechanical and Thermal Properties of Polypropylene

Hernández‐Fernández

Vivas‐Reyes

Toloza

2022

IJMS

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During the production of polymer-grade propylene, different processes are used to purify this compound and ensure that it is of the highest quality. However, some impurities such as acetylene and methyl acetylene are difficult to remove, and some of these impurities may be present in the propylene used to obtain polypropylene, which may have repercussions on the process. This study evaluates the impact of these acetylene and methyl acetylene impurities on the productivity of the polypropylene synthesis process and on the mechanical and thermal properties of the material obtained through the synthesis of eight samples with different concentrations of acetylene and eight samples with different concentrations of acetylene. We discovered that for the first concentrations of both acetylene (2 and 3 ppm) and methyl acetylene (0.03 and 0.1), the MFI, thermal recording, and mechanical properties of the resin were unaffected by the variation of the fluidity index, thermal degradation by TGA, and mechanical properties such as resistance to tension, bending, and impact. However, when the concentration exceeded 14 ppm for methyl acetylene and 12 ppm for acetylene, the resistance of this resin began to decrease linearly. Regarding production, this was affected by the first traces of acetylene and methyl acetylene progressively decreasing.

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Section: Methodsmentioning

confidence: 99%

Experimental Study of the Impact of Trace Amounts of Acetylene and Methylacetylene on the Synthesis, Mechanical and Thermal Properties of Polypropylene

Hernández‐Fernández

Vivas‐Reyes

Toloza

2022

IJMS

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“…After stirring at 0 °C for 4 h and filtering, the Star-PEG-PCL 2 -2Br was obtained and dried at 40 °C in vacuo (90.8 % yield). 1…”

Section: Synthesis Of the Star-peg-pcl 2 -2brmentioning

confidence: 99%

“…Gas chromatography (GC) is an acknowledged technique in terms of rapid separation and analysis, and therefore widely used in petroleum, [1] chemical industry, [2] agriculture, [3] environmental protection [4] and medicine fields [5] . High‐performance stationary phase as the key factor in GC, which can be divided into linear polymers, [6] macrocyclic compounds, [7] ionic liquids, [8] metal‐organic frameworks (MOFs) [9] and covalent organic frameworks (COFs) [10] according to their molecular type at present, having a great influence on the separation efficiency.…”

Section: Introductionmentioning

confidence: 99%

Benzimidazolium Ionic‐Liquid‐Functionalized Star‐shaped Copolymer Stationary Phase for Capillary Gas Chromatography

et al. 2022

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In this work, a novel star-shaped copolymer functionalized by benzimidazolium ionic liquid (Star-PEG-PCL 2 -2Bim) was synthesized and applied as stationary phase in capillary gas chromatography (GC). After static coating, the Star-PEG-PCL 2 -2Bim column exhibited a column efficiency of 2655 plates/m and moderate polarity. The Star-PEG-PCL 2 -2Bim column showed preferential retention and high resolving capability for hydrogen-bonded and aromatic analytes, showing advantages over the ordinary polysiloxane phase. Impressively, it attained high resolution for the isomer mixtures of halogenated benzene, nitrobenzene, phenol and benzaldehydes with good peak shapes. The advantageous separation performance shows the good potential of the Star-PEG-PCL 2 -2Bim stationary phase for GC analysis.

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“…These manipulations of the samples are characterized by being susceptible to external manipulations and with high time consumption for the execution of the analytical tests. Due to the good results obtained in the systematization and simultaneity of chromatography analysis through the implementation of 2, 4 and 6-way valves [16] , [17] , [18] , this same principle is applied for the adaptation of laboratory analysis to scale them to caprolactam producing plants. Therefore, this prototype design proposes a semi-automation of these tests that allow simultaneous performance and automatic calculation for the reduction of laboratory time.…”

Section: Introductionmentioning

confidence: 99%

Development and validation of a prototype for the on-line simultaneous analysis of quality caprolactam synthesized on an industrial scale

2023

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Development and validation of a methodology for quantifying parts-per-billion levels of arsine and phosphine in nitrogen, hydrogen and liquefied petroleum gas using a variable pressure sampler coupled to gas chromatography-mass spectrometry

Cited by 22 publications

References 20 publications

Experimental Study of the Impact of Trace Amounts of Acetylene and Methylacetylene on the Synthesis, Mechanical and Thermal Properties of Polypropylene

Experimental Study of the Impact of Trace Amounts of Acetylene and Methylacetylene on the Synthesis, Mechanical and Thermal Properties of Polypropylene

Benzimidazolium Ionic‐Liquid‐Functionalized Star‐shaped Copolymer Stationary Phase for Capillary Gas Chromatography

Development and validation of a prototype for the on-line simultaneous analysis of quality caprolactam synthesized on an industrial scale

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