Search Results - "Koropchak, John A"

Aerosol-based detectors for liquid chromatography by Magnusson, Lars-Erik, Risley, Donald S., Koropchak, John A.

“…•Detectors for liquid chromatography.•Evaporative light scattering detection.•Condensation nucleation light scattering detection/nano-quantity analyte…”
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Condensation nucleation light scattering detection with ion chromatography for direct determination of glyphosate and its metabolite in water by You, Jing, Koropchak, John A.

“…An ion chromatography–condensation nucleation light scattering detection (IC–CNLSD) method was successfully used to directly analyze glyphosate, a polar…”
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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 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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Evidence for sub-3 nanometer neutralized particle detection using glycerol as a condensing fluid by Magnusson, Lars-Erik, Anisimov, Michael P., Koropchak, John A.

“…A two-step condensation process was utilized, with glycerol introduced via an initial precondenser step, with secondary condensation and detection occurring…”
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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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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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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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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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Corona Discharge Neutralizer for Electrospray Aerosols Used with Condensation Nucleation Light-Scattering Detection by Lu, Qi, Koropchak, John A

“…To obviate the use of radioactive materials, a simple unipolar electrical neutralizer based on a corona discharge was developed to neutralize electrospray…”
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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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Direct Determination of Glyphosate in Environmental Waters Using Capillary Electrophoresis with Electrospray Condensation Nucleation Light Scattering Detection by You, Jing, Kaljurand, Mihkel, Koropchak, John A.

“…Scientists integrated an electrospray condensation nucleation light scattering detector with capillary electrophoresis (CE) techniques for the assessment of…”
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Thermospray sample introduction to atomic spectrometry by Zhang, Xiaohua, Chen, Ding, Marquardt, Rob, Koropchak, John A

“…The status of thermospray sample introduction for analytical atomic spectrometry is reviewed beginning with description of general principles and operational…”
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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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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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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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Aperture-based thermospray vaporizer by Koropchak, John A, Aryamanya-Mugisha, Henry

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Tubular Donnan dialysis-inductively coupled plasma atomic emission spectrometry by Koropchak, John A, Dabek-Zlotorzynska, Ewa

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Investigations of simultaneous coal and lignin liquefaction: kinetic studies by Akash, Bilal A, Muchmore, Charles B, Koropchak, John A, Kim, Jong Won, Lalvani, Shashi B

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