QUANTITATIVE CHROMATOGRAPHIC METHODS: PART 7. ISOLATION OF AMINO ACIDS FROM SERUM AND OTHER FLUIDS

1961 ◽  
Vol 39 (2) ◽  
pp. 439-451 ◽  
Author(s):  
C. K. Harris ◽  
E. Tigane ◽  
C. S. Hanes
Keyword(s):  
Amino Acids ◽  
Quantitative Analysis ◽  
Ion Exchange ◽  
Paper Chromatography ◽  
Biological Fluids ◽  
Inorganic Cations ◽  
Chromatographic Methods ◽  
Tissue Extracts

A method based on the use of miniature ion-exchange columns has been devised for isolating small amounts of amino acids from biological fluids and tissue extracts. The amino acids are isolated virtually free from proteins, sugars, and inorganic cations in a single treatment.Techniques are described for the preparation of solutions of the isolated amino acids for quantitative analysis by paper chromatography.

scholarly journals AMINO ACID COMPOSITION AND ELECTROPHORETIC PROPERTIES OF HYPERTENSIN I

1955 ◽  
Vol 102 (4) ◽  
pp. 435-440 ◽  
Author(s):  
Leonard T. Skeggs ◽  
Walton H. Marsh ◽  
Joseph R. Kahn ◽  
Norman P. Shumway
Keyword(s):  
Amino Acids ◽  
Quantitative Analysis ◽  
Amino Acid ◽  
Ion Exchange ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Isoelectric Point ◽  
Column Chromatography ◽  
Isoleucine Leucine ◽  
Ion Exchange Column

A preparation of hypertensin I was purified by countercurrent distribution and was shown to migrate as a single component in starch blocks at pH 9.3 and 4.2. It had an isoelectric point of 7.7. Quantitative analysis by ion exchange column chromatography showed eight amino acids in approximately unimolar proportion: aspartic, proline, valine, isoleucine, leucine, tyrosine, phenylalanine, and arginine. There were in addition two moles of histidine.

Chromatographic Separation of Free Amino Acids in Table Sirups

1971 ◽  
Vol 54 (1) ◽  
pp. 61-65
Author(s):  
Arthur Russell Johnson ◽  
Richard L Corliss ◽  
Enrique Fernandez-Flores
Keyword(s):  
Amino Acids ◽  
Quantitative Analysis ◽  
Amino Acid ◽  
Ion Exchange ◽  
Free Amino Acids ◽  
Free Amino ◽  
Amino Acid Mixture ◽  
Acid Mixture ◽  
Butyl Esters ◽  
Tlc Analysis

Abstract Qualitative chromatographic methods for the separation of free amino acids in table sirups are presented to aid in the development of chemical indices of composition which may be useful in establishing the identity of sirups and detecting their adulteration. Free amino acids in 2 table sirups were isolated on ion exchange columns and eluted with dilute ammonia. The concentrated amino acid mixture in the eluate was spotted directly on silica gel G plates for TLC analysis, or the amino acids were converted to their N-trifluoroacetyl n-butyl esters for GLC analysis. As many as 16 amino acids were qualitatively separated and identified and a potential for quantitative analysis was demonstrated.

Effect of Deproteinating Agents (Picric Acid and Sulfosalicylic Acid) on Analysis for Free Amino Acids in Swine Blood and Tissue

1969 ◽  
Vol 52 (5) ◽  
pp. 981-984 ◽  
Author(s):  
J E Knipfel ◽  
D A Christensen ◽  
B D Owen
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Ion Exchange ◽  
Free Amino ◽  
Biological Fluids ◽  
Picric Acid ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Sulfosalicylic Acid ◽  
Coefficients Of Variation

Abstract Amino acid analyses were performed on samples of blood, liver tissue, loin muscle, and ham muscle by ion exchange chromatography after deproteination of the samples with picric acid or sulfosalicylic acid (SSA). Resolution of threonine and serine from the ion exchange column was poor when SSA was used as the deproteinating agent. Twelve of sixteen amino acids were higher (P < 0.05) in serum deproteinated with picric acid as compared to concentrations determined after SSA deproteination. Amino acid values for ham muscle tended to be higher after deproteination with picric acid; however, with liver and loin muscle samples, the values were somewhat higher after SSA deproteination. In both serum and tissue analyses, coefficients of variation were lower for niGSt amino acids when picric acid was utilized as the deproteinating agent. The latter observation, in particular, suggests that picric acid is preferable to SSA as a deproteinating agent before amino acid analyses of biological fluids. Standardization of methods of deproteination is needed to allow meaningful comparisons of data.

A Rapid and Simple Thin-Layer Chromatographic Method for Amino Acids in Blood

1969 ◽  
Vol 15 (9) ◽  
pp. 902-907 ◽  
Author(s):  
William J Culley
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Thin Layer ◽  
Paper Chromatography ◽  
Amino Acid Metabolism ◽  
Chromatographic Method ◽  
Acid Metabolism ◽  
Inborn Errors ◽  
Chromatographic Methods ◽  
Finger Tip

Abstract Simple and rapid thin-layer chromatographic methods, using heel or finger-tip blood, are described that are suitable for screening for inborn errors of amino acid metabolism. Serum is chromatographed without deproteinizing. A variation of this method utilizes blood impregnated on paper discs for chromatography. These methods are much faster, more sensitive, and provide better resolution of amino acids than paper chromatography. Because untreated serum- or blood-impregnated discs are placed directly on thin-layer chromatograms, these methods require considerably less working time than other thin-layer chromatographic methods.

scholarly journals A collaborative test of ion-exchange chromatographic methods for determining amino acids

1968 ◽  
Vol 22 (3) ◽  
pp. 437-450 ◽  
Author(s):  
J. W. G. Porter ◽  
D. R. Westgarth ◽  
A. P. Williams
Keyword(s):  
Amino Acids ◽  
Ion Exchange ◽  
Chromatographic Methods ◽  
Collaborative Test
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