کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7606508 1492949 2017 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quantification of triglyceride content in oleaginous materials using thermo-gravimetry
ترجمه فارسی عنوان
محاسبه مقدار تری گلیسیرید در مواد نفتی با استفاده از ترموگرومتری
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Laboratory analytical methods for quantification of triglyceride content in oleaginous biomass samples, especially microalgae, require toxic chemicals and/or organic solvents and involve multiple steps. In this paper, a simple triglyceride quantification method that uses thermo-gravimetry is described. This method is based on the observation that triglycerides undergo near-complete volatilization/degradation over a narrow temperature interval with a derivative weight loss peak at 420 °C when heated in an inert atmosphere. Degradation of the other constituents of oleaginous biomass (protein and carbohydrates) is largely complete after prolonged exposure of samples at 320 °C. Based on these observations, the triglyceride content of oleaginous biomass was estimated by using the following two-step process. In Step 1, samples were heated to 320 °C and kept isothermal at this temperature for 15 min. In Step 2, samples were heated from 320 °C to 420 °C and then kept isothermal at 420 °C for 15 min. Our results show that mass loss in step 2 correlated well with triglyceride content estimates obtained from conventional techniques for diverse microalgae and oilseed samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Analytical and Applied Pyrolysis - Volume 128, November 2017, Pages 232-237
نویسندگان
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