I have purchased a highly volatile compound known as geosmin. It was contained in a glass ampule. Geosmin was dissolved in dichloromethane (DCM). I made several aliquots of 30Ul in a 1.5ml micro-centrifuge tips, put the lid and covered the top properly by parafilm sheet and stored at 4oC. But, after 3-5 days, when i required this compound for the reaction set-up, I found out that the MCTs are empty. Can anyone suggest me how to store such highly volatile compounds?

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