Piezoelectric trace vapor calibrator

Verkouteren, R. Michael; Gillen, Greg; Taylor, David W.
August 2006
Review of Scientific Instruments;Aug2006, Vol. 77 Issue 8, p085104
Academic Journal
The design and performance of a vapor generator for calibration and testing of trace chemical sensors are described. The device utilizes piezoelectric ink-jet nozzles to dispense and vaporize precisely known amounts of analyte solutions as monodisperse droplets onto a hot ceramic surface, where the generated vapors are mixed with air before exiting the device. Injected droplets are monitored by microscope with strobed illumination, and the reproducibility of droplet volumes is optimized by adjustment of piezoelectric wave form parameters. Complete vaporization of the droplets occurs only across a 10 °C window within the transition boiling regime of the solvent, and the minimum and maximum rates of trace analyte that may be injected and evaporated are determined by thermodynamic principles and empirical observations of droplet formation and stability. By varying solution concentrations, droplet injection rates, air flow, and the number of active nozzles, the system is designed to deliver—on demand—continuous vapor concentrations across more than six orders of magnitude (nominally 290 fg/l to 1.05 μg/l). Vapor pulses containing femtogram to microgram quantities of analyte may also be generated. Calibrated ranges of three explosive vapors at ng/l levels were generated by the device and directly measured by ion mobility spectrometry (IMS). These data demonstrate expected linear trends within the limited working range of the IMS detector and also exhibit subtle nonlinear behavior from the IMS measurement process.


Related Articles

  • Pulling the Plug on the Data Cable: Wireless Transmission of Chemical Sensor Data Using a Cordless Phone. Slagel, Susan L.; Harrington, Peter de B.; Schmittauer, Paul // Spectroscopy;Oct1999, Vol. 14 Issue 10, p42 

    Focuses on a study which explored the use of an ion mobility spectrometry (IMS) sensor that is made more portable by the transmission of data via a cordless telephone. Discussion on how IMS works; Materials and methods; Results and discussion.

  • Molecular beam epitaxy interface contamination by suboxide transport. Wood, Colin E. C.; Wilson, Richard A. // Journal of Applied Physics;4/1/1993, Vol. 73 Issue 7, p3543 

    Describes a thermodynamic model in which impurities are transported from the effusion cells as suboxides. Semiconductor properties that are degraded by unintentional impurities; Types of epitaxial structures; Relationship between secondary negative ion mass spectrometry profiles and intentional...

  • Comparison of negative and positive modes of ion-mobility increment spectrometry in the detection of heroin vapors. Buryakov, I.; Baldin, M. // Journal of Analytical Chemistry;Aug2008, Vol. 63 Issue 8, p787 

    Some analytical characteristics of ion-mobility increment spectrometry ( IMIS) in the negative and positive modes were compared in detecting diacetylmorphine vapors. It was shown experimentally that the sensitivity of IMIS in the negative mode to diacetylmorphine depends on the concentration of...

  • Excellent thermal stability of Al[sub 2]O[sub 3]/ZrO[sub 2]/Al[sub 2]O[sub 3] stack structure for metal–oxide–semiconductor gate dielectrics application. Chang, Hyo Sik; Jeon, Sanghun; Hwang, Hyunsang; Moon, Dae Won // Applied Physics Letters;5/6/2002, Vol. 80 Issue 18, p3385 

    The thermal stability of a nanolaminate (Al[sub 2]O[sub 3]/ZrO[sub 2]/Al[sub 2]O[sub 3]) gate stack prepared by atomic layer chemical vapor deposition was investigated using medium-energy ion scattering spectroscopy, and x-ray photoelectron spectroscopy. We observed that the structure was stable...

  • DETEKTORY DO WYKRYWANIA SKAÅ»EŃ CHEMICZNYCH DLA BEZZAŁOGOWEJ PLATFORMY LÄ„DOWEJ (STRAÅ»AK). HARMATA, Władysław; MAZIEJUK, Mirosław; CEREMUGA, Michał // Safety & Fire Technique / Bezpieczenstwo i Technika Pozarnicza;2014, Vol. 33 Issue 1, p93 

    Objective: The aim of the article is to present the structure and performance of the detector for the chemical contamination detection, installed on the unmanned mobile platform "Strażak" (Fireman) presented in the review article BiTP Vol. 30 Issue 2,2013, pp. 81-90. Introduction: The current...

  • Electrochemically controlled solid-phase micro-extraction of proline using a nanostructured film of polypyrrole, and its determination by ion mobility spectrometry. Kalhor, Hamideh; Ameli, Akram; Alizadeh, Naader // Microchimica Acta;Jul2013, Vol. 180 Issue 9/10, p783 

    We report on a fast, simple and accurate method for the determination of proline in urine samples by employing a nanostructured film of conducting polypyrrole for electrochemically controlled solid-phase microextraction, and ion mobility spectrometry (IMS) for detection. This method has the...

  • Are You Prepared for a Chemical Attack? Hartman, Rick // Fire Chief;May2005 Supplement, Vol. 49, p6 

    The article provides information on chemical warfare agents. The agents are divided into four classes: nerve, blister, choking and blood. It is recommended that full-body and respiratory protection be used because agents can be introduced into the body through either the skin or the respiratory...

  • A laser ion-mobility spectrometer. Kotkovskii, G. E.; Martynov, I. L.; Novikova, V. V.; Chistyakov, A. A. // Instruments & Experimental Techniques;Mar2009, Vol. 52 Issue 2, p253 

    The process of ion-packet broadening in a longitudinal laser spectrometer of ion mobility is studied. The contributions of the diffusion, Coulomb, and other broadening mechanisms are compared. The resolution of the developed spectrometer was measured ( R ∼ 45) in atmospheres of both...

  • Separation of DMMP/water vapor with PDMS/silica membranes for the sample inlet of ion mobility spectrometers. Molin Qin; Chenghai Guo; Liu Yang; Jianjun Zhao // Advanced Materials Research;2014, Vol. 1049-1050, p142 

    In order to obtain an ideal sample inlet membrane for ion mobility spectrometers (IMS), fumed silica was modified using hexamethyldisilazane and was incorporated into the matrix of polydimethylsiloxane (PDMS) silicone rubber to fabricate PDMS/silica mixed matrix membranes with different...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics