Rapid and sensitive determination of Dns-amino acids in plasma using high-speed octadecyl liquid chromatographic columns

1987 ◽  
Vol 413 ◽  
pp. 25-31 ◽  
Author(s):  
Jouko T. Työppönen
Keyword(s):  
Amino Acids ◽  
High Speed ◽  
Chromatographic Columns ◽  
Sensitive Determination ◽  
Liquid Chromatographic

scholarly journals Taking advantage of Co(ii) induced enhanced VCD for the fast and sensitive determination of enantiomeric excess

2017 ◽  
Vol 15 (46) ◽  
pp. 9800-9803 ◽  
Author(s):  
Lorenzo Arrico ◽  
Gaetano Angelici ◽  
Lorenzo Di Bari
Keyword(s):  
Amino Acids ◽  
Enantiomeric Excess ◽  
Sensitive Determination

Large Co(ii)-induced VCD signals provide a method for determining the enantiomeric excess of α-amino acids. This strategy can be followed for building new VCD protocols.

High-Speed Liquid Chromatographic Determination of o-Phenylphenol Residues in Citrus Products

1976 ◽  
Vol 59 (1) ◽  
pp. 162-164
Author(s):  
Samuel K Reeder
Keyword(s):  
Liquid Chromatography ◽  
Quantitative Analysis ◽  
High Speed ◽  
Steam Distillation ◽  
Chromatographic Determination ◽  
Analysis Time ◽  
Hexane Extraction ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A method is presented for the quantitative analysis of o-phenylphenol residues in citrus oils, encapsulated flavors, and dried meal. The method utilizes high-speed liquid chromatography for the determination after specific sample preparations for each material. These preparations include hexane extraction of acidified basic extracts or steam distillation and extraction. The limit of the analysis is <1 ppm with an analysis time of <45 min.

Reversed-Phase Liquid Chromatographic Determination of Hypoglycin A (HG-A) in Canned Ackee Fruit Samples

1994 ◽  
Vol 77 (5) ◽  
pp. 1175-1179 ◽  
Author(s):  
Ghulam Sarwar ◽  
Herbert G Botting
Keyword(s):  
Amino Acids ◽  
Chromatographic Determination ◽  
Reversed Phase ◽  
Precolumn Derivatization ◽  
Edible Portion ◽  
Fruit Samples ◽  
Liquid Chromatographic Determination ◽  
Phase Liquid ◽  
Liquid Chromatographic

Abstract A reversed-phase liquid chromatographic (LC) method involving precolumn derivatization with phenylisothiocyanate (PITC) was developed for determining levels of hypoglycin A (HG-A) in canned ackee fruit samples. HG-A was extracted by homogenizing the drained fruit in 80% ethanol. By using a Waters Pico-Tag amino acid analysis 15-cm-long column (which is also used for analyzing protein hydrolysates and biological samples) and an LC system, the baseline separation of HG-A from other amino acids was completed in about 6 min. The total time for analysis and equilibration was 16 min. HG-A levels in the edible portion of fruit in 18 cans varied from 18.27 to 87.50 mg HG-A/can. Recoveries of added standard HG-A averaged 101%. To our knowledge, this is the first report of the use of this method to determine HG-A in ackee fruit.

Sign in / Sign up

Export Citation Format

Share Document