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Hair sulfur amino acid analysis
1Deutsches Wollforschungsinstitut an der RWTH Aachen e.V., Germany.
EXS
|January 1, 1997
Summary
This study reviews analytical methods for sulfur-containing amino acids in hair, including cystine and cysteine. It highlights polarography and spectroscopy as key techniques for analyzing these crucial hair components.
Area of Science:
- Biochemistry
- Analytical Chemistry
Background:
- Hair composition analysis is crucial for understanding its properties and integrity.
- Sulfur-containing amino acids, particularly cystine, play a vital role in hair structure and strength.
Purpose of the Study:
- To provide an overview of current analytical procedures for sulfur-containing amino acids in hair.
- To detail methods for quantifying specific amino acids like cystine, cysteine, and their derivatives.
Main Methods:
- Review of analytical techniques including chromatography, titration, colorimetry, polarography, and spectroscopy.
- Focus on methods applicable to intact hair and its hydrolysates (partial and total).
- Specific mention of ion-exchange chromatography for analyzing cysteic acid, lanthionine, and lysinoalanine after total hydrolysis.
Main Results:
- Polarography and spectroscopy are identified as preferred methods for analyzing cysteine, cystine, and cystine oxides.
- Ion-exchange chromatography is effective for analyzing cysteic acid, lanthionine, and lysinoalanine in total hydrolysates.
- A range of analytical approaches are suitable for different sulfur-containing amino acids and sample preparations.
Conclusions:
- Accurate determination of sulfur-containing amino acids in hair is achievable through various analytical methods.
- The choice of method depends on the specific amino acid and whether the sample is intact hair or a hydrolysate.
- This review consolidates knowledge on essential analytical techniques for hair amino acid profiling.
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