Accurate quantification of guayule resin and rubber requires sample drying below a critical temperature threshold

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• 作者：Katrina Cornish^a ; ^{cornish.19@osu.edu} ; Calvin H. Pearson^b ; ¹ ; ^{calvin.pearson@colostate.edu} ; Donna J. Rath^b ; ²
• 关键词：Drying temperature ; Guayule ; Metabolites ; Resin ; Rubber ; Secondary products
• 刊名：Industrial Crops and Products
• 出版年：2013
• 期刊代码：56_09266690
• 类别：abs
• 出版时间：January, 2013
• 卷：41
• 期：Complete
• 页码：158-164
• 文件大小：961 K

摘要

To accurately quantify secondary products in plant materials, using solvent extraction, harvested plant materials must be dried and ground without altering the amount and, preferably, the composition of the compounds of interest. We examined the effect of pre-extraction drying temperatures and times on the acetone and hexane-extractable components of guayule, resin and rubber, respectively. Drying guayule samples at 50 掳C prior to extraction did not alter subsequent extractions of resin and rubber. However, drying temperatures of 75 掳C, and above, degraded guayule rubber into acetone-soluble fragments. The total amount of acetone and hexane extractable material remained constant up to 150 掳C. However, the acetone and hexane soluble materials were progressively volatilized at 200 掳C. We predict that the sensitivity of secondary products to drying temperatures in not confined to guayule and suggest that plant drying temperatures should be carefully evaluated for their impacts on the quantity and composition of analytes.