It involves using a constant climate chamber to simulate temperature, humidity (RH), and light. The samples are stored at different temperatures, such as 20 °C, 30 °C, and 40 °C, and exposed to high intensity light. Finally, color loss is measured as changes in hue (ΔH) as a function of different time intervals.
Changes (chemical, microbiological, and physical) are measured at specific time intervals until the product is no longer edible. In addition to determining product and food coloring stability, accelerated shelf-life testing is useful for a number of other purposes, e.g., to determine product safety under improper storage conditions, for troubleshooting in the initial stages of product development, and for assessing the suitability of product packaging.
Through long-term constant temperature and humidity values and exceptionally high accuracy, the KBF P constant climate chamber from BINDER provides optimum benefit for use in the food industry. With a temperature range of 10 to 60 °C and a humidity range of 10 to 75% RH, the unit responds superbly to climatic requirements. A unique lighting concept with variable-position illumination cassettes also ensures that light is distributed across the entire usable space in the best-possible way. The BINDER APT.line™ preheating chamber technology guarantees homogeneous temperature distribution in the inner chamber of the units.
Leatherhead Food Research, an organization based in Birmingham in the United Kingdom, offers a wide range of experience and services in the food industry, such as market reviews, food research, analyses, food approvals, business and technical information, as well as training. For the determination of accelerated tests, the laboratory has studied individual food colorings in three different food models (hard caramels, gelatine-based candies, and fruit-based beverages).
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