Determination of chlorophyll in plant samples by liquid chromatography using zinc-phthalocyanine as an internal standard

Torsten Bohn, Thomas Walczyk*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)

Abstract

Chlorophyll analysis at high precision and accuracy is limited by the lack of suitable, commercially available internal standards for HPLC analysis. Here, the commercially available dye zinc-phthalocyanine is presented as a new internal standard to quantify chlorophylls in vegetable foods and to detect chlorophyll degradation products. The technique was applied to chlorophyll analysis of a selection of vegetable foods. Pigments were extracted with N,N-dimethylformamide from the vegetables and purified by solid phase extraction. Chlorophyll a, a′, b, b′, corresponding pheophytins, and zinc-phthalocyanine were separated by HPLC using a C18 reverse-phase column and fluorescence detection.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalJournal of Chromatography A
Volume1024
Issue number1-2
DOIs
Publication statusPublished - 23 Jan 2004
Externally publishedYes

Keywords

  • Chlorophylls
  • Zinc-phthalocyanine

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