Table of reduced mobility values from ambient pressure ion mobility spectrometry

Shumate, Christopher B.; Louis, Robert H. St.; Hill, Herbert H.

doi:10.1016/s0021-9673(00)80211-3

Cited by 65 publications

(34 citation statements)

References 40 publications

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“…The use of 2,4-dimethyl pyridine (2,4-DMP), commonly referred to as 2,4-lutidine or lutidine, was first proposed as a reference standard in the 1980s [14,15] and it has since become a widely adopted positive mode standard [16]. Lutidine ions produce a single, sharp IMS peak with a reduced mobility (K 0 ) value of 1.95 cm 2 V −1 s −1 (in air [15] and nitrogen [17]).…”

Section: Current Status Of Standardisation In Imsmentioning

confidence: 99%

“…Lutidine ions produce a single, sharp IMS peak with a reduced mobility (K 0 ) value of 1.95 cm 2 V −1 s −1 (in air [15] and nitrogen [17]). The lutidine dimer peak can also be observed with K 0 of 1.43 cm 2 V −1 s −1 [6,18].…”

Section: Current Status Of Standardisation In Imsmentioning

confidence: 99%

“…A number of groups have established libraries of drift times, collision cross sections, and reduced mobilities for selected analytes under specified conditions, all of which are accessible to IMS users. Hill et al [15] presented tables of reduced ion mobilities for compounds reported during the period 1970-1985 using ambient pressure IMS. Additional information, such as K 0 of product ions, the carrier and drift gases used in each case and the temperature of the drift tube were also defined in this review.…”

Section: Ims Spectral Librariesmentioning

confidence: 99%

See 2 more Smart Citations

Chemical standards for ion mobility spectrometry: a review

Kaur-Atwal

O’Connor

Aksenov

et al. 2009

Int. J. Ion Mobil. Spec.

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Ion mobility spectrometry (IMS), using standalone instrumentation and hyphenated with mass spectrometry (IM-MS), has recently undergone significant expansion in the numbers of users and applications, particularly in sectors outside its established user base; predominantly military and security applications. Although several IMS reference standards have been proposed, there are no currently universally recognised reference standards for the calibration and evaluation of mobility spectrometers. This review describes current practices and the literature on chemical standards for validating IMS systems in positive and negative ion modes. The key qualities and requirements an 'ideal' reference standard must possess are defined, together with the instrumental and environmental factors such as temperature, electric field, humidity and drift gas composition that may need to be considered. Important challenges that have yet to be resolved are also identified and proposals for future development presented.

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Section: Current Status Of Standardisation In Imsmentioning

confidence: 99%

Section: Current Status Of Standardisation In Imsmentioning

confidence: 99%

Section: Ims Spectral Librariesmentioning

confidence: 99%

See 1 more Smart Citation

Chemical standards for ion mobility spectrometry: a review

Kaur-Atwal

O’Connor

Aksenov

et al. 2009

Int. J. Ion Mobil. Spec.

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“…From Table 2, it can be seen that the K o values for both TNT and 4-nitrophenol are in good agreement with the reported literature values (1.49 for TNT [27] and 1.86 for 4-nitrophenol [25]). Although, there are a wide range of reported literature values for both compounds [28], the literature values were chosen based on similarities in IMS conditions. Since many of the compounds had not been studied previously, their IMS spectra are presented in Fig.…”

Section: Ims Response For 17 Suspected Contaminantsmentioning

confidence: 99%

Evaluation of suspected interferents for TNT detection by ion mobility spectrometry

Matz

Tornatore

Hill

2001

Talanta

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“…Note that the three terms are vectors and are added in accordance with vector summation rules. Under typical corona discharge conditions, an electric field near the counter electrode is E ~ 5 × 10 3 V/cm, the ion mobility is K ~ 2 × 10 -4 m 2 /(V s) [5], and the "electri cal" part of the ion velocity amounts to V el ~ 100 m/s. If the counter electrode is not very much extended, the airflow (wind) at a velocity of 20-30 m/s can blow off a significant part of ions generated in discharge.…”

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confidence: 99%

Obtaining electricity by direct transfer of charge generated in corona discharge

2015

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The depletion of traditional energy sources such as deposits of hydrocarbons and uranium, as well as eco logical problems related to the traditional methods of energy production, make searching for alternative methods of electricity generation an important task. In past decades, much effort has been spent in developing such methods, with some forms thereof-e.g., solar and wind power engineering-already being employed on a commercial basis [1]. However, even these methods cannot be considered to be environ mentally clean, since the energy consumed in manu facturing one wind power generator or solar cell is comparable with (or exceed) the total yield of electric energy for the entire working life of these devices [2]. Therefore, the search for new methods of electricity production with minimum capital expenditures is still topical.In this work, we consider the possibility of generat ing electricity by means of direct transfer of charge carriers in a gas or vapor flow. It is proposed to use corona discharge as the source of charge carriers of one sign, in which the spatial separation of carriers takes place naturally [3]. Indeed, in the region of corona discharge that is adjacent to a counter elec trode, positive or negative ions (depending on the corona type) move freely in a self consistent electric field comprising a sum of the fields of electrodes and carriers (space charge) involved in the formation of corona [4]. These charge carriers can be used to pro vide the electromotive force (emf).Consider a system in which a flow of air, other gas, or vapor moves perpendicular to the axis of discharge. In this case, ions occur under the action of two forces-from this flow and from the electric field-so that, e.g., in air at atmospheric pressure, the motion of ions can be described by the following equation:where V i is the ion velocity, V g is the velocity of gas flow, E is the electric field strength, and K is the ion mobil ity. Note that the three terms are vectors and are added in accordance with vector summation rules. Under typical corona discharge conditions, an electric field near the counter electrode is E ~ 5 × 10 3 V/cm, the ion mobility is K ~ 2 × 10 -4 m 2 /(V s) [5], and the "electri cal" part of the ion velocity amounts to V el ~ 100 m/s. If the counter electrode is not very much extended, the airflow (wind) at a velocity of 20-30 m/s can blow off a significant part of ions generated in discharge. Let us consider an example of how these ions can be used for emf generation. Figure 1 shows a simple electrical scheme of emf generation with the aid of corona discharge. Then dis charge operates between point electrode 1 and counter electrode 2. The latter electrode must be arranged downstream of the airflow. In practice, the minimum gap width is several millimeters and is limited by the transition from corona to spark discharge with decreasing area of the counter electrode. Collector electrode 3 is a grid of mesh that must be fine enough to capture moving ions, while being sufficiently trans parent to produce ...

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Table of reduced mobility values from ambient pressure ion mobility spectrometry

Cited by 65 publications

References 40 publications

Chemical standards for ion mobility spectrometry: a review

Chemical standards for ion mobility spectrometry: a review

Evaluation of suspected interferents for TNT detection by ion mobility spectrometry

Obtaining electricity by direct transfer of charge generated in corona discharge

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