RSI: Chemistry http://scitation.aip.org/ RSI: Chemistry Pilot-scale cooling tower to evaluate corrosion, scaling, and biofouling control strategies for cooling system makeup water http://link.aip.org/link/?RSI/83/024101/1&agg=rss S. H. Chien, M. K. Hsieh, H. Li, J. Monnell, D. Dzombak et al.<br/> Pilot-scale cooling towers can be used to evaluate corrosion, scaling, and biofouling control strategies when using particular cooling system makeup water and particular operating conditions. To study the potential for using a number of different impaired waters as makeup water, a pilot-scale system ... [Rev. Sci. Instrum. 83, 024101 (2012)] published Mon Feb 6, 2012. An ultrashort-duration, high-repetition-rate pulse source for laser ionization/mass spectrometry http://link.aip.org/link/?RSI/83/014101/1&agg=rss T. Uchimura, N. Nakamura, and T. Imasaka<br/> This paper describes a sample inlet system with several advantages over other pulsed valves, as applied to resonance-enhanced multiphoton ionization/time-of-flight mass spectrometry. The nozzle is based on online concentration by analyte adsorption/laser desorption (online COLD), where a capillary c ... [Rev. Sci. Instrum. 83, 014101 (2012)] published Mon Jan 9, 2012. Airfoil sampling of a pulsed Laval beam with tunable vacuum ultraviolet synchrotron ionization quadrupole mass spectrometry: Application to low-temperature kinetics and product detection http://link.aip.org/link/?RSI/82/124102/1&agg=rss Satchin Soorkia, Chen-Lin Liu, John D. Savee, Sarah J. Ferrell, Stephen R. Leone et al.<br/> A new pulsed Laval nozzle apparatus with vacuum ultraviolet (VUV) synchrotron photoionization quadrupole mass spectrometry is constructed to study low-temperature radical-neutral chemical reactions of importance for modeling the atmosphere of Titan and the outer planets. A design for the sampling ge ... [Rev. Sci. Instrum. 82, 124102 (2011)] published Thu Dec 15, 2011. A gain and bandwidth enhanced transimpedance preamplifier for Fourier-transform ion cyclotron resonance mass spectrometry http://link.aip.org/link/?RSI/82/124101/1&agg=rss Tzu-Yung Lin, Roger J. Green, and Peter B. O'Connor<br/> The nature of the ion signal from a 12-T Fourier-transform ion cyclotron resonance mass spectrometer and the electronic noise were studied to further understand the electronic detection limit. At minimal cost, a new transimpedance preamplifier was designed, computer simulated, built, and tested. The ... [Rev. Sci. Instrum. 82, 124101 (2011)] published Fri Dec 9, 2011. Development and integration of a LabVIEW-based modular architecture for automated execution of electrochemical catalyst testing http://link.aip.org/link/?RSI/82/114103/1&agg=rss Angel A. Topalov, Ioannis Katsounaros, Josef C. Meier, Sebastian O. Klemm, and Karl J. J. Mayrhofer<br/> This paper describes a system for performing electrochemical catalyst testing where all hardware components are controlled simultaneously using a single LabVIEW-based software application. The software that we developed can be operated in both manual mode for exploratory investigations and automatic ... [Rev. Sci. Instrum. 82, 114103 (2011)] published Thu Nov 17, 2011. A novel approach for high precision rapid potentiometric titrations: Application to hydrazine assay http://link.aip.org/link/?RSI/82/114102/1&agg=rss P. Sahoo, N. Malathi, R. Ananthanarayanan, K. Praveen, and N. Murali<br/> We propose a high precision rapid personal computer (PC) based potentiometric titration technique using a specially designed mini-cell to carry out redox titrations for assay of chemicals in quality control laboratories attached to industrial, R&D, and nuclear establishments. Using this technique a ... [Rev. Sci. Instrum. 82, 114102 (2011)] published Wed Nov 16, 2011. A light emitting diode based photoelectrochemical screener for distributed combinatorial materials discovery http://link.aip.org/link/?RSI/82/114101/1&agg=rss Gates R. Winkler and Jay R. Winkler<br/> Combinatorial approaches for targeted discovery of new materials require rapid screening systems to evaluate large numbers of new material compositions. High-throughput combinatorial materials discovery is a capital-intensive undertaking requiring sophisticated robotic sample preparation and rapid s ... [Rev. Sci. Instrum. 82, 114101 (2011)] published Wed Nov 2, 2011. Design, construction, and testing of a large-cavity, 1-10 GHz Flygare-Balle spectrometer http://link.aip.org/link/?RSI/82/094103/1&agg=rss Stephen G. Kukolich and Laszlo C. Sarkozy<br/> A large pulsed-beam, Fourier transform microwave spectrometer employing 48 in. diameter mirrors and 35 (NHS-35) diffusion pump has been constructed at the University of Arizona. The Fabry-Perot-type cavity, using the large mirrors provides Q-values in the 15 000 to 40 000 range. Test spectra were ob ... [Rev. Sci. Instrum. 82, 094103 (2011)] published Fri Sep 23, 2011. Laser ablation-miniature mass spectrometer for elemental and isotopic analysis of rocks http://link.aip.org/link/?RSI/82/094102/1&agg=rss M. P. Sinha, E. L. Neidholdt, J. Hurowitz, W. Sturhahn, B. Beard et al.<br/> A laser ablation-miniature mass spectrometer (LA-MMS) for the chemical and isotopic measurement of rocks and minerals is described. In the LA-MMS method, neutral atoms ablated by a pulsed laser are led into an electron impact ionization source, where they are ionized by a 70 eV electron beam. This r ... [Rev. Sci. Instrum. 82, 094102 (2011)] published Wed Sep 14, 2011. Electrical calcium test for moisture barrier evaluation for organic devices http://link.aip.org/link/?RSI/82/094101/1&agg=rss S. Schubert, H. Klumbies, L. Muller-Meskamp, and K. Leo<br/> We discuss the electrical calcium test a method to measure very small rates of water vapor permeation through barrier films with high throughput. The sensitivity range for our design is found to be 10 to 15 g/(m d). Moreover, a closer look at the importance of electrodes series resistance is taken: ... [Rev. Sci. Instrum. 82, 094101 (2011)] published Wed Sep 7, 2011. Infrared multiphoton dissociation tandem charge detection-mass spectrometry of single megadalton electrosprayed ions http://link.aip.org/link/?RSI/82/084104/1&agg=rss Tristan Doussineau, Cong Yu Bao, Christian Clavier, Xavier Dagany, Michel Kerleroux et al.<br/> This work presents the implementation of tandem mass spectrometry for experiments on single electrosprayed ions from compounds of megadalton (MDa) molecular weight, using two charge detection devices. The first mass spectrometry stage (first charge detection device) combined with an ion gate allows ... [Rev. Sci. Instrum. 82, 084104 (2011)] published Mon Aug 29, 2011. A shock tube with a high-repetition-rate time-of-flight mass spectrometer for investigations of complex reaction systems http://link.aip.org/link/?RSI/82/084103/1&agg=rss Steffen H. Durrstein, Mohammad Aghsaee, Ludger Jerig, Mustapha Fikri, and Christof Schulz<br/> A conventional membrane-type stainless steel shock tube has been coupled to a high-repetition-rate time-of-flight mass spectrometer (HRR-TOF-MS) to be used to study complex reaction systems such as the formation of pollutants in combustion processes or formation of nanoparticles from metal containin ... [Rev. Sci. Instrum. 82, 084103 (2011)] published Thu Aug 25, 2011. High-temperature and high-pressure pulsed synthesis apparatus for supercritical production of nanoparticles http://link.aip.org/link/?RSI/82/084102/1&agg=rss Jakob R. Eltzholtz and Bo B. Iversen<br/> In materials science continuous flow supercritical fluid reactors are widely used for highly controlled synthesis of nanoparticles. The major limitation of continuous flow reactors is that the inherent distribution of residence times leads to broadening of the corresponding size distribution of the ... [Rev. Sci. Instrum. 82, 084102 (2011)] published Mon Aug 15, 2011. Laboratory test reactor for the investigation of liquid reducing agents in the selective catalytic reduction of NO http://link.aip.org/link/?RSI/82/084101/1&agg=rss D. Peitz, A. Bernhard, M. Elsener, and O. Krocher<br/> A test reactor was designed and built for investigating liquid reducing agents in the selective catalytic reduction (SCR) process in the laboratory. The design of the experimental setup is described in detail and its performance was evaluated. Using a glass nebulizer, liquid reducing agents were spr ... [Rev. Sci. Instrum. 82, 084101 (2011)] published Mon Aug 8, 2011. Design of model-friendly turbulent non-premixed jet burners for C hydrocarbon fuels http://link.aip.org/link/?RSI/82/074101/1&agg=rss Jiayao Zhang, Christopher R. Shaddix, and Robert W. Schefer<br/> Experimental measurements in laboratory-scale turbulent burners with well-controlled boundary and flow configurations can provide valuable data for validating models of turbulence-chemistry interactions applicable to the design and analysis of practical combustors. This paper reports on the design o ... [Rev. Sci. Instrum. 82, 074101 (2011)] published Thu Jul 7, 2011. Laser dispersion and ignition of metal fuel particles http://link.aip.org/link/?RSI/82/064101/1&agg=rss Ahmed A. Abdel-Hafez, Matthew W. Brodt, Joel R. Carney, and James M. Lightstone<br/> The development of a laser-shock technique for dispersing Al metal fuel particles at velocities approaching those expected in a detonating explosive is discussed. The technique is described in detail by quantifying how air drag affects the temporal variation of the velocity of the dispersed particle ... [Rev. Sci. Instrum. 82, 064101 (2011)] published Fri Jun 24, 2011. Vacuum compatible sample positioning device for matrix assisted laser desorption/ionization Fourier transform ion cyclotron resonance mass spectrometry imaging http://link.aip.org/link/?RSI/82/054102/1&agg=rss Konstantin Aizikov, Donald F. Smith, David A. Chargin, Sergei Ivanov, Tzu-Yung Lin et al.<br/> The high mass accuracy and resolving power of Fourier transform ion cyclotron resonance mass spectrometers (FT-ICR MS) make them ideal mass detectors for mass spectrometry imaging (MSI), promising to provide unmatched molecular resolution capabilities. The intrinsic low tolerance of FT-ICR MS to RF ... [Rev. Sci. Instrum. 82, 054102 (2011)] published Fri May 27, 2011. Hybrid quadrupole mass filter/quadrupole ion trap/time-of-flight-mass spectrometer for infrared multiple photon dissociation spectroscopy of mass-selected ions http://link.aip.org/link/?RSI/82/054101/1&agg=rss Kerim Gulyuz, Corey N. Stedwell, Da Wang, and Nick C. Polfer<br/> We present a laboratory-constructed mass spectrometer optimized for recording infrared multiple photon dissociation (IRMPD) spectra of mass-selected ions using a benchtop tunable infrared optical parametric oscillator/amplifier (OPO/A). The instrument is equipped with two ionization sources, an elec ... [Rev. Sci. Instrum. 82, 054101 (2011)] published Fri May 6, 2011. An effusive molecular beam technique for studies of polyatomic gassurface reactivity and energy transfer http://link.aip.org/link/?RSI/82/044102/1&agg=rss G. W. Cushing, J. K. Navin, L. Valadez, V. Johanek, and I. Harrison<br/> An effusive molecular beam technique is described to measure alkane dissociative sticking coefficients, S(T, T; theta), on metal surfaces for which the impinging gas temperature, T, and surface temperature, T, can be independently varied, along with the angle of incidence, theta, of the impinging ga ... [Rev. Sci. Instrum. 82, 044102 (2011)] published Wed Apr 20, 2011. Measurement of volume resistivity/conductivity of metallic alloy in inhibited seawater by optical interferometry techniques http://link.aip.org/link/?RSI/82/034103/1&agg=rss K. Habib<br/> Optical interferometry techniques were used for the first time to measure the volume resistivity/conductivity of carbon steel samples in seawater with different concentrations of a corrosion inhibitor. In this investigation, the real-time holographic interferometry was carried out to measure the thi ... [Rev. Sci. Instrum. 82, 034103 (2011)] published Fri Mar 18, 2011. Preparation and accurate measurement of pure ozone http://link.aip.org/link/?RSI/82/034102/1&agg=rss Christof Janssen, Daniela Simone, and Mickael Guinet<br/> Preparation of high purity ozone as well as precise and accurate measurement of its pressure are metrological requirements that are difficult to meet due to ozone decomposition occurring in pressure sensors. The most stable and precise transducer heads are heated and, therefore, prone to accelerated ... [Rev. Sci. Instrum. 82, 034102 (2011)] published Mon Mar 14, 2011.