کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2168549 1092905 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Melting point equations for the ternary system water/sodium chloride/ethylene glycol revisited
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Melting point equations for the ternary system water/sodium chloride/ethylene glycol revisited
چکیده انگلیسی

Partial phase diagrams are of considerable utility in the development of optimized cryobiological procedures. Recent theoretical predictions of the melting points of ternary solutions of interest to cryobiology have caused us to re-examine measurements that our group made for the ethylene-glycol–sodium chloride–water phase diagram. Here we revisit our previous experiments by measuring melting points at five ethylene-glycol to sodium chloride ratios (R values; R = 5, 10, 15, 30, and 45) and five levels of concentration for each ratio. Melting points were averaged from three measurements and plotted as a function of total solute concentration for each R value studied. The new measurements differed from our original experimental values and agreed with predicted values from both theoretical models. Additionally, the data were fit to the polynomial described in our previous report and the resulting equation was obtained:Tm=(38.3-2.145×10-1R)w+(81.19-2.909×10-1R)w2,Tm=(38.3-2.145×10-1R)w+(81.19-2.909×10-1R)w2,where w is the total solute mass fraction. This new equation provided good fits to the experimental data as well as published values and relates the determined polynomial constants to the R value of the corresponding isopleths of the three dimensional phase diagram, allowing the liquidus curve for any R value to be obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryobiology - Volume 61, Issue 3, December 2010, Pages 352–356
نویسندگان
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