Optimization strategy for isocratic separation of alpha-aspartame and its breakdown products by reversed phase liquid chromatography


Demiralay E., Ozkan G.

CHROMATOGRAPHIA, cilt.60, ss.579-582, 2004 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 60
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1365/s10337-004-0421-7
  • Dergi Adı: CHROMATOGRAPHIA
  • Sayfa Sayıları: ss.579-582

Özet

alpha-Aspartame (L-alpha-aspartyl-L-phenylalanine methyl ester) is increasingly being used in wide variety of commonly consumed food products. This structure contains ester and peptide bonds. The ester linkage may hydrolyze to produce L-alpha-aspartyl-L-phenylalanine or cyclohydrolyze to produce the corresponding cliketopiperazine ring. This ring can open to form L-alpha-aspartyl-Lphenylalanine and ultimately this compound can hydrolyze to L-phenylalanine and L-aspartic acid. The pH, buffer type, concentration, the presence of water and temperature are other important factors affecting its stability. Because a-aspartame can lose its sweetness under these conditions determination of aspartame and its breakdown products is extremely important for diet foods quality.