Thermo Scientific Pierce Vacuum Hydrolysis Tube, 1 mL is a high-quality glass tube designed for heated, acid-based, vacuum hydrolysis of proteins and peptides for amino acid analysis.
Features of Vacuum Hydrolysis Tube, 1 mL:
• Saves 10-18 hours on hydrolysis procedures when combined with 6N HCl (Part No. 24308) • Provides for hydrolysis in 6 hours when heated at 150°C in a dry block heater (Note: the upper temperature limit of Vacuum Hydrolysis Tubes is 260°C in a block heater but only 110°C in an oven) • Optimal hydrolysis control when used with Reacti-Therm Dry Block Heating System • Compatible-fitting are available for use with Thermo Scientific Reacti-Therm Heating Modules
Vacuum Hydrolysis Tubes are precision-designed for use in protein hydrolysis and subsequent analysis of protein and peptide amino acid compositions. The heavy-walled borosilicate glass construction ensures complete compatibility with all commonly used acid hydrolysis reagents. Acid hydrolysis at elevated temperatures, in vacuo, will hydrolyze most proteins and peptides to their amino acid components without significant decomposition.
Vacuum hydrolysis methods commonly use 6N constant boiling hydrochloric acid (HCl), a mixture of HCl and propionic acid, 3N mercaptoethanesulfonic acid or 4N methanesulfonic acid. The constant boiling HCl method uses standard protein hydrolysis at 105 to 110°C for 16 to 24 hours. Using the HCl/propionic acid method, hydrolysis times can be shortened to 15 minutes at 160°C. Tryptophan is easily degraded by acid hydrolysis in 6N HCl. The presence of oxygen, heavy metals and carbohydrates are contributing factors to this degradation. A 22-hour hydrolysis method was developed to improve tryptophan recovery from protein hydrolysis samples by using 3N mercaptoethanesulfonic acid. A second method to improve tryptophan recovery involves hydrolysis at 115°C using 4N methanesulfonic acid.