{"id":12768,"date":"2020-01-01T10:05:29","date_gmt":"2020-01-01T09:05:29","guid":{"rendered":"https:\/\/www.pedak.nl\/waarom-geven-temperatuurverschillen-ook-verschil-in-aw-waarde\/"},"modified":"2021-12-20T16:56:07","modified_gmt":"2021-12-20T15:56:07","slug":"why-do-temperature-differences-also-produce-differences-in-the-aw-value","status":"publish","type":"post","link":"https:\/\/www.pedak.nl\/en\/why-do-temperature-differences-also-produce-differences-in-the-aw-value\/","title":{"rendered":"Why do temperature differences result in changes in Aw value?"},"content":{"rendered":"<h2><span style=\"color: #f28d00;\"><strong>How temperature affects Aw value<\/strong><\/span><\/h2>\n<p>As well as measuring the Aw value (water activity) of your products, the temperature at which the measurements are taken is critical. If you want to guarantee the quality and shelf life of your products, it is important to realise that the amount of free water in the product changes as the temperature rises or falls.<br \/>\nSuppose the temperature is higher on one day than on the next (e.g. because it is warm outside and the temperature in your laboratory rises accordingly). The Aw value could be lower so it would appear that your products have a different shelf life than those measured on a cold day. Which measurement can you rely on?<\/p>\n<p>&nbsp;<\/p>\n<h3><span style=\"color: #f28d00;\"><strong>Guarantee of quality and shelf life<\/strong><\/span><\/h3>\n<p>As a quality assurance or R&amp;D assistant, you simply cannot accept these uncertainties, so it is vital that whenever and wherever you take the Aw readings, the temperatures are the same. This applies whether you are in a factory, an office or another laboratory, and whether it\u2019s a harsh winter or sweltering summer&#8230;. The measurements must always be taken at the same temperature if you are to guarantee the quality and shelf life of your products. You will also minimise the likelihood of being unable to deliver products, or even worse, having to recall them. It is also true that for many products, there is a European requirement stating that the Aw value must always be measured at the same temperature (for meat products, for example, this is 25 degrees Celsius). So now you know why!<\/p>\n<p>&nbsp;<\/p>\n<h3><strong><span style=\"color: #f28d00;\">About the Aw value<\/span><\/strong><\/h3>\n<p>Aw value (water activity) tells us the amount of free water contained in a product. It can therefore tell us the likelihood of mould and bacterial growth. Mould and bacterial growth can occur at 0.6 Aw or higher. As well as being used in the food industry, the Aw value is also a key parameter in the pharmaceutical, cosmetic and animal feed industries. It is measured using special Aw meters.\u00a0<a href=\"https:\/\/www.pedak.nl\/en\/what-is-the-aw-value-or-water-activity\/\">Novasina Aw meters<\/a>\u00a0 are popular due to their high level of accuracy and the temperature stability of their measuring chambers. This is important because, as we have already seen, we need to be certain that the temperature is always the same wherever the measurement is carried out.<\/p>\n<p>&nbsp;<\/p>\n<h3><span style=\"color: #f28d00;\"><strong>Insight through facts<\/strong><\/span><\/h3>\n<p>The reason we are explaining this is that we simply don\u2019t believe in guesswork or half-truths. We would rather gain understanding from empirical evidence. This is all explained during our regular Aw symposia and webinars. Please <a href=\"https:\/\/www.pedak.nl\/en\/contact\/\">contact<\/a> us for individual advice.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How temperature affects Aw value As well as measuring the Aw value (water activity) of your products, the temperature at which the measurements are taken is critical. If you want to guarantee the quality and shelf life of your products, it is important to realise that the amount of free water in the product changes [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":5043,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-12768","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.5 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How temperature affects Aw value - Pedak Meettechniek<\/title>\n<meta name=\"description\" content=\"Measuring and monitoring the Aw value alone is not enough. Temperature is an important factor. Why? 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