[특허]Method and apparatus for quantitative analysis of weakly ionized anions or cations

Method and apparatus for quantitative analysis of weakly ionized anions or cations 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-031/04 G01N-031/08
출원번호	US-0017576 (1979-03-05)
발명자 / 주소	Rich Jr. William E. (Mountain View CA) Johnson Edward L. (Milpitas CA) Sidebottom Thomas O. (Palo Alto CA)
출원인 / 주소	Dionex Corporation (Sunnyvale CA 02)
인용정보	피인용 횟수 : 24 인용 특허 : 0

초록 ▼

Method and apparatus for quantitative analysis of weakly ionized anions (e.g. carboxylates) or cations (e.g., organic amines). For anion analysis, the sample and a strong acid (e.g., HCl) eluent are passed through an ion exclusion chromatography column (cation exchange resin) to resolve the weak anions while eluting the strong anions in the void volume peak. HCl is stripped on an ion exchange stripper column in the silver ion form and the effluent is directed through a conductivity cell and associated readout for detection. For weak cation analysis, the sample and a strong base (e.g., Ba(OH)2) eluent are passed through an ion exclusion chromatography column (anion exchange resin) to resolve the weak cations while eluting the strong cations (e.g., Na+, K+) in the void volume peak. Ba(OH)2 is stripped on an ion exchange stripper column in the sulfate ion form and the effluent is directed through a conductivity cell and associated readout for detection.

대표청구항 ▼

The method of chromatographic separation and quantitative analysis of a plurality of different weak anions of weakly dissociated acids or of salts of weakly dissociated acids, said method comprising (a) directing a sample comprising a plurality of different weak anions of weakly dissociated acids or of salts of weakly dissociated acids, in an eluent solution through a chromatographic resin bed, said eluent comprising a strong acid substantially more dissociated than the acids of the weak anions, said strong acid being present at a concentration to substantially suppress ionization of said weak anions, said chromatographic resin being in a form to substantially resolve said weak anions, (b) directing the effluent containing said resolved weak anions and said strong acid from step (a) through a stripper column including a cation exchange resin in a form to remove the strong acid anion but not to disturb the resolution of the weak anions from the sample solution, and (c) directing the effluent from step (b) containing said resolved weak anions through a conductivity cell having associated readout means.

이 특허를 인용한 특허 (24)

Stevens Timothy S. (Midland MI) Miller ; Jr. Theodore E. (Midland MI), Analytical method for determining acid/salt and base/salt species concentration in solution.
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Schafer Helwig,CHX ; Laubli Markus,CHX ; Zahner Paul,CHX, Device for ion-exchange chromatography and method of cyclically regenerating a plurality of suppressors of such a device.
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Byers William A. (Penn Hills Township ; Allegheny County PA), Differential conductivity sulfate monitor.
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Kannan Srinivasan ; Christopher A. Pohl, Displacement chemical regeneration method and apparatus.
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Srinivasan, Kannan; Pohl, Christopher A., Displacement chemical regeneration method and apparatus.
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Stillian John R. (Pleasanton CA) Siriraks Archava (Santa Clara CA), Electrochemical pretreatment system for liquid sample analysis.
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Anderson ; Jr. James M. ; Saari-Nordhaus Raaidah ; Sims Carl W. ; Gerner Yuri E., Electrochemically regenerated ion neutralization and concentration devices and systems.
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Anderson ; Jr. James M. ; Saari-Nordhaus Raaidah ; Sims Carl W. ; Gerner Yuri E., Electrochemically regenerated ion neutralization and concentration devices and systems.
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Anderson, Jr.,James M.; Saari Nordhaus,Raaidah; Sims,Carl W.; Gerner,Yuri E., High-purity eluant generator.
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Small Hamish (Leland MI) Riviello John (Santa Cruz CA) Pohl Christopher A. (Union City CA), Ion chromatography using frequent regeneration of batch-type suppressor.
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Anderson, Jr., James M.; Saari Nordhaus, Raaidah; Sims, Carl W.; Gerner, Yuri E., Method and apparatus for generating a high purity eluant.
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Anderson, Jr., James M.; Saari-Nordhaus, Raaidah; Sims, Carl W.; Gerner, Yuri E., Method and system for generating a high purity eluant.
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Vanatta, Lynn E., Method for the determination of low-concentration anions in the presence of an excess of another anion.
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Liu, Yan; Barreto, Victor Manuel Berber; Pohl, Christopher A.; Riviello, John M., Recycled suppressor regenerants.
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Liu,Yan; Barreto,Victor Manuel Berber; Pohl,Christopher A.; Riviello,John M., Recycled suppressor regenerants.
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Karmarkar Shreekant V. (New Berlin WI), System and a method for using a small suppressor column in performing liquid chromatography.
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Egorov, Oleg B.; O'Hara, Matthew J.; Grate, Jay W.; Chandler, Darrell P.; Brockman, Fred J.; Bruckner-Lea, Cynthia J., Systems for column-based separations, methods of forming packed columns, and methods of purifying sample components.
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Egorov, Oleg B.; O'Hara, Matthew J.; Grate, Jay W.; Chandler, Darrell P.; Brockman, Fred J.; Bruckner-Lea, Cynthia J., Systems for column-based separations, methods of forming packed columns, and methods of purifying sample components.
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Egorov,Oleg B.; O'Hara,Matthew J.; Grate,Jay W.; Chandler,Darrell P.; Brockman,Fred J.; Bruckner Lea,Cynthia J., Systems for column-based separations, methods of forming packed columns, and methods of purifying sample components.
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Method and apparatus for quantitative analysis of weakly ionized anions or cations 원문보기

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Method and apparatus for quantitative analysis of weakly ionized anions or cations 원문보기

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