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A Straightforward Method for Glucosinolate Extraction and Analysis with High-pressure Liquid Chromatography (HPLC)
Published on: March 15, 2017
Glucosinolates in mixed-packaged mini broccoli and mini cauliflower under modified atmosphere
Monika C Schreiner1, Peter J Peters, Angelika B Krumbein
1Department Quality, Institute of Vegetable and Ornamental Crops Grossbeeren/Erfurt e.V., Theodor-Echtermeyer-Weg 1, 14979 Grossbeeren, Germany. schreiner@igzev.de
Journal of Agricultural and Food Chemistry
|March 16, 2006
Summary
Modified atmosphere packaging affects glucosinolates in mini broccoli and cauliflower. Optimal gas mixtures are needed for each vegetable to preserve these beneficial compounds during storage.
Area of Science:
- Horticultural science
- Food science
- Plant biochemistry
Background:
- Glucosinolates are key bioactive compounds in Brassica vegetables, influencing flavor and health benefits.
- Postharvest handling, including modified atmosphere packaging (MAP), can impact glucosinolate content.
- Mini Brassica vegetables like broccoli and cauliflower are popular for their convenience and nutritional value.
Purpose of the Study:
- To investigate the effect of different modified atmosphere packaging (MAP) conditions on the postharvest glucosinolate dynamics of mixed mini broccoli and mini cauliflower.
- To determine optimal MAP gas compositions for preserving glucosinolates in individual mini Brassica vegetables.
Main Methods:
- Mini broccoli (cv. Milady) and mini cauliflower (cv. Clarke) were packaged together in trays sealed with microperforated biaxial-oriented polypropylene films.
- Two different MAP gas compositions were tested: 8% O2 + 14% CO2 and 1% O2 + 21% CO2.
- Samples were stored at 8°C for up to 7 days, with analyses conducted at intervals to assess total and individual glucosinolates.
Main Results:
- MAP with 8% O2 + 14% CO2 effectively maintained aliphatic and indole glucosinolates in mini broccoli for 7 days, despite an initial decrease at 4 days.
- MAP with 1% O2 + 21% CO2 provided the best retention of indole glucosinolates in mini cauliflower and also preserved aliphatic glucosinolates after an initial dip at 4 days.
- Mixed packaging of mini broccoli and cauliflower under the tested MAP conditions led to different glucosinolate preservation outcomes for each vegetable.
Conclusions:
- Separate packaging of mini broccoli and mini cauliflower with tailored modified atmosphere compositions is recommended for optimal glucosinolate retention.
- Specific gas mixtures are required to maintain both external appearance and prevent off-odors while preserving glucosinolates in these mini Brassica vegetables.
- Understanding MAP effects on glucosinolate profiles is crucial for maintaining the quality and health benefits of postharvest Brassica vegetables.
