Company Highlights Partner Login Sigma EN Products Freeze-Drying Applications Service Sales Partners Contact You are here: Applications Environmental specimens Environmental specimens Drying environmental specimens Environmental samples are taken from the air, water, soil and sediments, vegetation and foods. The environmental specimen bank collects, stores and analyses environmentally representative specimens. The samples are analyzed for an extremely wide variety of components. Most analytical methods are only suitable for investigating small sample quantities, even if the available specimens are relatively large. In many cases it is worthwhile to freeze dry biological material before extraction for elemental analysis. Changes to the structure and content of the substances to be determined, such as PCBs, PACs and dioxins, are minimized. For many environmental specimens, it is also necessary to determine the water content of the sample. The water content is given by the difference between the fresh mass and the dry mass. The dry mass is determined from the dry residue after freeze drying for several days. This enables long-term storage of dried samples without leading to a change of state or loss of chemical properties. Martin Christ Freeze Dryers offers a wide range of products. Choose a laboratory freeze dryer – such as an Alpha 1-4 LSCplus with LyoCube – from our extensive portfolio. Martin Christ Gefriertrocknungsanlagen GmbH An der Unteren Söse 50 37520 Osterode am Harz Germany Phone +49 (0) 55 22 50 07-0 Fax +49 (0) 55 22 50 07-12 info@martinchrist.de Visit our other channels: Are you already familiar with our affiliated companies? Sigma Zentrifugen GmbH Imprint Privacy Cookie Settings Terms This website uses cookies! We use cookies. Some of them are necessary to make the website usable. Others help us display information that is relevant and engaging to you. As data protection is important to us, we ask you to decide on the scope of use. You can either accept all cookies or choose your individual settings. Thanks and enjoy our website! Accept all Advanced cookie settings Privacy Imprint Individual cookie settings This is an overview of all cookies used on this website. Please make your individual settings. You can adapt them at any time by using the "Cookie settings" link in the footer of this website. Accept all Save settings Back Essential (1) These cookies are essential to the operation of the website, e.g. by saving your cookie settings. Show details Analytics (1) Tools collecting usage data anonymoulsy, giving insights into how to improve our services for you. Show details External media (1) Tools enhancing the browsing exerience, e.g. maps or videos. Show details Privacy Imprint