Determination of ammonia in ethylene using ion mobility spectrometry

Cross, John H.; Limero, Thomas; Lane, James; Wang, Fusheng

doi:10.1016/s0039-9140(97)00095-7

Cited by 9 publications

(6 citation statements)

References 4 publications

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“…There are two ionization technologies of relevance: ion mobility spectrometry (IMS) [74][75][76][77][78][79][80] and photoionization detection (PID) [81][82][83]. IMS is a highly sensitive technique that can be used to analyze the composition of gas mixtures, including many of the target gases such as ammonia, hydrogen chloride, hydrogen iodide, iodine, phosphine, acetic anhydride, hexane, methylamine, and more.…”

Section: Ionization Sensorsmentioning

confidence: 99%

An assessment of sensing technologies for the detection of clandestine methamphetamine drug laboratories

Man

Stoeber

Walus

2009

Forensic Science International

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Section: Ionization Sensorsmentioning

confidence: 99%

An assessment of sensing technologies for the detection of clandestine methamphetamine drug laboratories

Man

Stoeber

Walus

2009

Forensic Science International

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“…Formaldehyde (CH 2 O) is a colourless gas under standard conditions which is toxic, allergenic and a potential human carcinogen [1,2,3,4] . The World Health Organisation (WHO) has set a guideline maximum level for prolonged or acute formaldehyde exposure at 80ppb (parts per billion), and many countries have set theirs in line with this [1,5] .…”

Section: Introductionmentioning

confidence: 99%

“…The World Health Organisation (WHO) has set a guideline maximum level for prolonged or acute formaldehyde exposure at 80ppb (parts per billion), and many countries have set theirs in line with this [1,5] . However, formaldehyde is also a valuable industrial chemical with limited alternatives [1,4] . Formaldehyde based resin is used as an adhesive in plywood and medium density fibre board, in carpeting, and in the production of paints and wallpapers.…”

Section: Introductionmentioning

confidence: 99%

“…Formaldehyde based resin is used as an adhesive in plywood and medium density fibre board, in carpeting, and in the production of paints and wallpapers. It is also a by-product of incomplete combustion [1] and is present in various cleaning products [1] . Many of these materials emit low concentrations of formaldehyde over time.…”

Section: Introductionmentioning

confidence: 99%

“…Many of these materials emit low concentrations of formaldehyde over time. Emission levels are highest when materials are new, generally decreasing exponentially, but can take multiple years to reach safe levels [1,5] . Formaldehyde gas can therefore build up in enclosed areas, particularly when new furnishings or carpeting have been installed and where premises are not adequately ventilated.…”

Section: Introductionmentioning

confidence: 99%

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Formaldehyde sensor using non-dispersive UV spectroscopy at 340nm

Davenport

Hodgkinson

Saffell³

et al. 2014

SPIE Proceedings

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Formaldehyde is a volatile organic compound that exists as a gas at room temperature. It is hazardous to human health causing irritation of the eyes, nose and throat, headaches, limited pulmonary function and is a potential human carcinogen. Sources include incomplete combustion, numerous modern building materials and vehicle fumes. Here we describe a simple method for detecting formaldehyde using low resolution non-dispersive UV absorption spectroscopy for the first time. A two channel system has been developed, making use of a strong absorption peak at 339nm and a neighbouring region of negligible absorption at 336nm as a reference. Using a modulated UV LED as a light source and narrowband filters to select the desired spectral bands, a simple detection system was constructed that was specifically targeted at formaldehyde. A minimum detectable absorbance of 4.5 × 10 -5 AU was estimated (as ∆I/I 0 ), corresponding to a limit of detection of approximately 6.6 ppm for a 195mm gas cell, with a response time of 20s. However, thermallyinduced drift in the LED spectral output caused this to deteriorate over longer time periods to around 30 ppm or 2 × 10 -4 AU.

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Determination of ethylene by field asymmetric ion mobility spectrometry

Chantipmanee

Hauser

2020

Int. J. Ion Mobil. Spec.

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The determination of ethylene with a field asymmetric ion mobility spectrometer, which can easily be constructed in-house, is described. The device makes use of a Krypton lamp for ionization. A rectangular pulse of 500 Vpp at 1 MHz was employed as separation waveform in the drift tube rather than the commonly used less efficient bisinusoidal waveform. The calibration curve for the range from 670 ppb(V/V) to 67 ppm(V/V) was found to be highly linear with a correlation coefficient of r = 0.9999. The limit of detection was determined as 200 ppb(V/V). The reproducibility was 4% (relative standard deviation). The device was found to be suitable for the determination of ethylene given off by fruit; 6 types of climacteric fruit were tested, namely apples, bananas, kiwi fruit, nectarines, pears and plums.

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Determination of ammonia in ethylene using ion mobility spectrometry

Cited by 9 publications

References 4 publications

An assessment of sensing technologies for the detection of clandestine methamphetamine drug laboratories

An assessment of sensing technologies for the detection of clandestine methamphetamine drug laboratories

Formaldehyde sensor using non-dispersive UV spectroscopy at 340nm

Determination of ethylene by field asymmetric ion mobility spectrometry

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