title: High-sensitivity phenylthiohydantoin amino acid analysis using conventional and microbore chromatography.
abstract: Reversed-phase microbore high-performance liquid chromatography was investigated for high-sensitivity analysis of phenylthiohydantoin (PTH) amino acids. A mixed nitrile alkylsilane bonded phase was developed and ternary gradient elution conditions were devised for resolution of the common PTH amino acids. Elution conditions were developed with a conventional 150 X 4.6 mm I.D. column and transferred to a 150 X 1 mm I.D. microbore column. The performance of these columns was evaluated in terms of PTH amino acid resolution, enhanced sample detectability, and retention time precision. For this work a general purpose high-performance liquid chromatograph was modified to reduce extra column band broadening and a preformed gradient elution technique was developed to achieve rapid analysis times at microbore flow-rates. The microbore high-performance liquid chromatographic system is useful for high-sensitivity analysis of PTH amino acids in micro-sequencing applications.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006827:Hydantoins / Q000032:analysis*; D010669:Phenylthiohydantoin / Q000032:analysis*
chemical_list: D000596:Amino Acids; D006827:Hydantoins; D010669:Phenylthiohydantoin