JAIC 1996, Volume 35, Number 1, Article 4 (pp. 45 to 59)
JAIC online
Journal of the American Institute for Conservation
JAIC 1996, Volume 35, Number 1, Article 4 (pp. 45 to 59)

GAS CHROMATOGRAPHIC ANALYSIS OF AMINO ACIDS AS ETHYL CHLOROFORMATE DERIVATIVES.

MICHAEL R. SCHILLING, HERANT P. KHANJIAN, & LUIZ A. C. SOUZA


ABSTRACT—Gas chromatography has long been used as a means of identifying proteins in acid hydrolysates of paints and adhesives on the basis of their amino acid composition. Existing procedures for amino acid derivatization can, however, take up to 4 hours per analysis, whereas a new procedure employed at the Getty Conservation Institute can be carried out in less than 20 minutes. This procedure involves the formation of N(O,S)-ethoxycarbonyl ethyl esters of amino acids using ethyl chloroformate and then a separation on an HP-INNOWAX capillary column. This procedure was employed to analyze samples from the binding media library at the Getty Conservation Institute, and amino acid compositions were tabulated for various proteins that could be used for identification purposes.

Article Sections:

1. INTRODUCTION
2. SCOPE OF RESEARCH
3. RESULTS
4. DISCUSSION
5. CONCLUSIONS
1. APPENDIX 1: AMINO ACIDS THAT MAY BE FOUND IN ACID HYDROLYSATES OF PROTEINS
2. APPENDIX 2: EXPERIMENTAL PROCEDURE
3. APPENDIX 3: TROUBLESHOOTING
a: Appendix , Materials , References , Author Information
Entire Article

Copyright 1996 American Institute for Conservation of Historic and Artistic Works