𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Strawberry juice colour: The effect of sulphur dioxide and edta on the stability of anthocyanins

✍ Scribed by Johanna Bakker; Peter Bridle

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
428 KB
Volume
60
Category
Article
ISSN
0022-5142

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The loss of anthocyanins and the formation of colour due to polymeric pigments in juices and purées prepared from strawberries (variety Senga sengana) was studied during storage at — 20°C and + 20°C. Four different treatments were given to the samples immediately after milling: no additions, EDTA addition, sulphur dioxide addition, and a combination of sulphur dioxide and EDTA. The concentration of anthocyanins and the proportion of colour due to polymeric pigments were measured by high‐performance liquid chromatography and spectrophotometry. Losses in anthocyanins were very small during 10 weeks storage at –20°C and there was no effect of the treatment. The addition of sulphur dioxide slowed down the loss of anthocyanins at + 20°C, especially in the purées and correspondingly decreased the rate of polymeric pigment formation. Addition of EDTA had only a slight effect on colour stability.

📜 SIMILAR VOLUMES

A note on the influence of acetaldehyde
A note on the influence of acetaldehyde on colour of strawberry juice
✍ Wen-Pin Chen; Ronald E. Wrolstad 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 173 KB 👁 1 views

## Abstract Addition of acetaldehyde to strawberry juice caused an increase in colour density and decrease in anthocyanin content on storage. When both acetaldehyde and catechin were added, these changes were intensified. However, addition of catechin alone did not affect colour density. The result

The Effect of Sulphur Dioxide on the Pla
The Effect of Sulphur Dioxide on the Plasticity and Electrical Properties of copper oxides
✍ N. Birks; D. L. Hewson 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 German ⚖ 207 KB

## Abstract The dissolution of sulphur in copper oxides leads to modifications of the ionic and electronic defect structures, causing anion and cation mobilities and possibly the electron hole concentration to be increased. No clear explanation or mechanism for these effects is available so far. Th

The effect of exogenous pectinase on DMH
The effect of exogenous pectinase on DMHF and derivatives in clarified strawberry juice (Fragaria × ananassa, cv. Elsanta)
✍ Emanuela Mura; Ioannis Zabetakis 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 99 KB 👁 1 views

## Abstract The effect of exogenous pectinase on the levels of 2,5‐dimethyl‐4‐hydroxy‐2__H__‐furan‐one (DMHF) and DMHF‐glucoside was studied in clarified strawberry juice (__Fragaria__ × __ananassa__, cv. Elsanta). The extent of conversion of DMHF‐malonyl glucoside to DMHF‐glucoside and DMHF was mo