Liquid chromatographic determination of water

Fortier, N E; Fritz, J S

Title: Liquid chromatographic determination of water

Full Record
Other Related Research

Abstract

A sensitive method for the determination of water in the presence of common interferences is presented. The detection system is based on the effect of water on the equilibrium which results from the reaction aryl aldehydes, such as cinnamaldehyde and methanol in the eluent to form cinnamaldehyde dimethylacetal, plus water. This equilibrium is shifted in a catalytic atmosphere of a hydrogen ion form past column reactor. The extent of the shift and the resulting change in absorbance are proportional to the amount of water present. 1 fig.

Inventors:: Fortier, N E; Fritz, J S

Issue Date:: 1990-11-13

OSTI Identifier:: 7267695

Patent Number(s):: 4970170

Application Number:: PPN: US 7-220743

Assignee:: Iowa State Univ. Research Foundation, Inc., Ames, IA (United States)

DOE Contract Number:: W-7405-ENG-82

Resource Type:: Patent

Resource Relation:: Patent File Date: 18 Jul 1988

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALDEHYDES; CHEMICAL REACTIONS; METHANOL; WATER; QUANTITATIVE CHEMICAL ANALYSIS; LIQUID COLUMN CHROMATOGRAPHY; ALCOHOLS; CHEMICAL ANALYSIS; CHROMATOGRAPHY; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; SEPARATION PROCESSES; 400102* - Chemical & Spectral Procedures

Citation Formats


                    Fortier, N E, and Fritz, J S. Liquid chromatographic determination of water.  United States: N. p., 1990. 
        Web.

Copy to clipboard


                    Fortier, N E, & Fritz, J S. Liquid chromatographic determination of water.  United States.

Copy to clipboard


                    Fortier, N E, and Fritz, J S. Tue .  
        "Liquid chromatographic determination of water".  United States.

Copy to clipboard


                    
@article{osti_7267695,

  title        = {Liquid chromatographic determination of water},

  author       = {Fortier, N E and Fritz, J S},

  abstractNote = {A sensitive method for the determination of water in the presence of common interferences is presented. The detection system is based on the effect of water on the equilibrium which results from the reaction aryl aldehydes, such as cinnamaldehyde and methanol in the eluent to form cinnamaldehyde dimethylacetal, plus water. This equilibrium is shifted in a catalytic atmosphere of a hydrogen ion form past column reactor. The extent of the shift and the resulting change in absorbance are proportional to the amount of water present. 1 fig.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1990},

  month        = {11}

}

Copy to clipboard

Patent:

Search for the full text at the U.S. Patent and Trademark Office

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Liquid chromatographic determination of water

Patent Fortier, Nancy E [Fairfield, OH]; Fritz, James S [Ames, IA]

A sensitive method for the determination of water in the presence of common interferences is presented. The detection system is based on the effect of water on the equilibrium which results from the reaction aryl aldehydes, such as cinnamaldehyde and methanol in the eluent to form cinnamaldehyde dimethylacetal, plus water. This equilibrium is shifted in a catalytic atmosphere of a hydrogen ion form past column reactor. The extent of the shift and the resulting change in absorbance are proportional to the amount of water present.
Full Text Available
Dual liquid and gas chromatograph system

Patent Gay, D D

A chromatographic system is described that utilizes one detection system for gas chromatographic and micro-liquid chromatographic determinations. The detection system is a direct-current, atmospheric-pressure, helium plasma emission spectrometer. The detector utilizes a nontransparent plasma source unit which contains the plasma region and two side-arms which receive effluents from the micro-liquid chromatograph and the gas chromatograph. The dual nature of this chromatographic system offers: (1) extreme flexibility in the samples to be examined; (2) extreme low sensitivity; (3) element selectivity; (4) long-term stability; (5) direct correlation of data from the liquid and gas samples; (6) simpler operation than with individual liquidmore » « less
High-pressure liquid chromatographic gradient mixer

Patent Daughton, C G; Sakaji, R H

A gradient mixer effects the continuous mixing of any two miscible solvents without excessive decay or dispersion of the resultant isocratic effluent or of a linear or exponential gradient. The two solvents are fed under low or high pressure by means of two high performance liquid chromatographic pumps. The mixer comprises a series of ultra-low dead volume stainless steel tubes and low dead volume chambers. The two solvent streams impinge head-on at high fluxes. This initial nonhomogeneous mixture is then passed through a chamber packed with spirally-wound wires which cause turbulent mixing thereby homogenizing the mixture with minimum band-broadening.
Micro-column plasma emission liquid chromatograph. [Patent application]

Patent Gay, D D

In a direct current plasma emission spectrometer for use in combination with a microcolumn liquid chromatograph, an improved plasma source unit is claimed. The plasma source unit includes a quartz capillary tube having an inlet means, outlet off gas means and a pair of spaced electrodes defining a plasma region in the tube. The inlet means is connected to and adapted to receive eluant of the liquid chromatograph along with a stream of plasma-forming gas. There is an opening through the wall of the capillary tube penetrating into the plasma region. A soft glass capillary light pipe is disposed atmore » « less
Liquid chromatographic extraction medium

Patent Horwitz, E P; Dietz, M L

A method and apparatus are disclosed for extracting strontium and technetium values from biological, industrial and environmental sample solutions using a chromatographic column. An extractant medium for the column is prepared by generating a solution of a diluent containing a Crown ether and dispersing the solution on a resin substrate material. The sample solution is highly acidic and is introduced directed to the chromatographic column and strontium or technetium is eluted using deionized water. 1 fig.

Similar Records