![]() Krylov EV, Nazarov EG (2009) Electric field dependence of the ion mobility. Kolakowski BM, Mester Z (2007) Review of applications of high-field asymmetric waveform ion mobility spectrometry (FAIMS) and differential mobility spectrometry (DMS). Shvartsburg AA (2008) Differential ion mobility spectrometry: nonlinear ion transport and fundamentals of FAIMS. Liang F, Kerpen K, Kuklya A, Telgheder U (2012) Fingerprint identification of volatile organic compounds in gasoline contaminated groundwater using gas chromatography differential ion mobility spectrometry. Schneider BB, Covey TR, Nazarov EG (2013) DMS-MS separations with different transport gas modifiers. doi: 10.1016/S0160-4120(98)00093-2Ĭhary NS, Fernandez-Alba AR (2012) Determination of volatile organic compounds in drinking and environmental waters. Saeed T, Al-Mutairi M (1999) Chemical composition of the water-soluble fraction of the leaded gasolines in seawater. Shih T, Rong Y, Harmon T, Suffet M (2004) Evaluation of the impact of Fuel hydrocarbons and oxygenates on groundwater resources. Some notable aspects of the formation of the reactant ion positive are demonstrated and discussed.īaciocchi R, Berardi S, Verginelli I (2010) Human health risk assessment: Models for predicting the effective exposure duration of on-site receptors exposed to contaminated groundwater. The strong influence of the proton affinity of analytes on the peak area in the measurements with modifiers was demonstrated. The influence of the modifier concentration on the compensation voltage, peak area, and peak width was investigated and discussed. The influence of the polar modifiers on the DMS separation ability was proven on examples of the six aromatic compounds (BTEX, 1,2,4-trimethylbenzene (TMB), and naphthalene) and one aliphatic compound (hexane). Moreover, the peak area of the model compounds decreases with the increase of the modifier (water vapors and 2-propanole) concentration. Utilization of polar modifiers which are usually applied for the improvement of separation ability of DMS based systems does not improve the separation of aromatic compounds. libjs-sphinxdoc is necessary for the Javascript stuff in the documentation.In this paper, we demonstrate that humidity is a crucial parameter for analysis of aromatic compounds of low polarity with planar differential ion mobility spectrometry. the width of a peak can be an independent variable, can be the same as the width of another peak or can be given by a complicated - common to all peaks - formula. The main advantage of the program is flexibility - parameters of peaks can be arbitrarily bound to each other, eg. Fityk offers various nonlinear fitting methods, subtracting background, calibrating data, easy placement of peaks and changing peak parameters, automation of common tasks with scripts, and much more. It was developed for analyzing diffraction patterns, but can be also used in other fields, since concepts and operations specific for crystallography are separated from the rest of the program. In other words, for nonlinear peak separation and analysis. Fityk general-purpose nonlinear curve fitting and data analysisįityk is a flexible and portable program for nonlinear fitting of analytical functions (especially peak-shaped) to data (usually experimental data).
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