Search Results - "Koropchak, J A"

Sensitive, universal detection for capillary electrochromatography using condensation nucleation light scattering detection by Guo, Wei, Koropchak, J.A., Yan, Chao

“…Condensation nucleation light scattering detection (CNLSD) was coupled with a pressurized capillary electrochromatography (pCEC) system using an electrospray…”
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Thermospray Methods for Rapid, Sensitive, and Nonchromatographic Speciation of Chromium Oxidation States by Zhang, Xiaohua, Koropchak, John A

“…A sensitive technique for speciation and quantification of Cr(III) and Cr(VI) has been developed using thermospray (TSP) sample introduction with inductively…”
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Coupling Condensation Nucleation Light Scattering Detection with Capillary Electrophoresis Using Electrospray by Szostek, Bogdan, Zajac, Joe, Koropchak, John A

“…An improved method for coupling capillary electrophoresis (CE) with condensation nucleation light scattering detection (CNLSD) is described. The method employs…”
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Condensation Nucleation Light Scattering Detection for Capillary Electrophoresis by Szostek, Bogdan, Koropchak, John A

“…We describe two means for interfacing condensation nucleation light scattering detection to capillary electrophoresis (CE). With the first method, a…”
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Condensation nucleation light scattering detection for biogenic amines separated by ion-exchange chromatography by Sadain, Salma K, Koropchak, John A

“…A sensitive method of analysis for biogenic amines, putrescine, cadaverine, histamine and an amino acid precursor, histidine is described herein using…”
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Thermospray enhanced inductively coupled plasma atomic emission-spectroscopy detection for liquid chromatography by Roychowdhury, S. B, Koropchak, John A

“…Thermospray sample introduction is studied as an interface between liquid chromatography and inductively coupled plasma atomic emission spectrometry for metal…”
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Thermospray interfacing for flow injection analysis with inductively coupled plasma atomic emission spectrometry by Koropchak, J. A, Winn, D. H

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Nanoparticle detection technology by KOROPCHAK, J. A, SADAIN, S, XIAOHUI YANG, MAGNUSSON, L.-E, HEYBROEK, M, ANISIMOV, M, KAUFMAN, S. L

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New developments in thermospray sample introduction for atomic spectrometry by Conver, Timothy Shawn, Yang, Jinfu, Koropchak, John A.

“…The status of thermospray sample introduction for analytical atomic spectrometry was last reviewed in 1992. In this review, we summarize developments in this…”
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Direct comparison of evaporative light-scattering and condensation nucleation light-scattering detection for liquid chromatography by Koropchak, J.A., Heenan, C.L., Allen, L.B.

“…The analytical characteristics of a commercial evaporative light-scattering detection (ELSD) system were compared to those of condensation nucleation…”
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Direct Speciation of Selenite and Selenate with Thermospray Sample Introduction Methods by Yang, Jinfu, Conver, Timothy S, Koropchak, John A

“…Thermospray is a high-temperature and high-pressure process compared with pneumatic nebulization. In this study, these characteristics of thermospray were…”
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Use of a multi-tube Nafion ® membrane dryer for desolvation with thermospray sample introduction to inductively coupled plasma-atomic emission spectrometry by Yang, Jinfu, Conver, Timothy S., Koropchak, John A., Leighty, David A.

“…A multi-tube Nafion ® membrane dryer used as a part of a desolvation system in conjunction with thermospray nebulization was optimized and characterized with…”
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Condensation Nucleation Light Scattering Detection for Conventional Reversed-Phase Liquid Chromatography by Allen, Lori B, Koropchak, John A, Szostek, Bogdan

“…In an investigation of the capabilities of condensation particle counting techniques for separations detection, condensation nucleation light-scattering…”
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Fundamental aspects of aerosol-based light-scattering detectors for separations by Koropchak, J A, Magnusson, L E, Heybroek, M, Sadain, S, Yang, X, Anisimov, M P

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Condensation nucleation light scattering: a new approach to development of high-sensitivity, universal detectors for separations by Allen, Lori B, Koropchak, John A

“…A study attempted to overcome particle size limitations to light scattering detection for liquid chromatography by employing a technique based on condensation…”
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Direct Chromium Speciation Using Thermospray: Preliminary Studies with Inductively Coupled Plasma Mass Spectrometry by Zhang, Xiaohua, Koropchak, John A.

“…Thermospray (TSP) sample introduction methods have been found to selectively deposit Cr(III) in the presence of Cr(VI) and thus provide a direct,…”
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Flow injection Donnan dialysis preconcentration of trace metal cations for inductively coupled plasma atomic emission spectrometry by Kasthurikrishnan, Narasimhan, Koropchak, John A

“…The applicability of flow injection Donnan dialysis with inductively coupled plasma atomic emission spectrometry as the detector for a wide variety of cations…”
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Investigations of Particle Characteristics and Carrier Effects on Particle Beam LC-MS by Li, Yongtao, Koropchak, John A.

“…We investigated the characteristics of the particles resulting from a thermospray nebulizer and two different desolvation systems for particle beam liquid…”
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Flow-injection Donnan dialysis preconcentration of cations for flame atomic absorption spectrophotometry by Koropchak, John A, Allen, Lori

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Evidence for aerosol ionic redistribution within aerosols produced by chrome electroplating by Koropchak, John A, Roychowdhury, Sheema B

“…Aerosols from a chrome electroplating shop were collected with a cascade impactor to yield size-selective data. Results indicated that particle size…”
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