Determination of unfrozen matrix concentrations at low temperatures using stepwise DSC

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Determination of unfrozen matrix concentrations at low temperatures using stepwise DSC. / Liesebach, Jens; Lim, Miang; Rades, Thomas.

In: Thermochimica Acta, Vol. 411, No. 1, 19.02.2004, p. 43-51.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Liesebach, J, Lim, M & Rades, T 2004, 'Determination of unfrozen matrix concentrations at low temperatures using stepwise DSC', Thermochimica Acta, vol. 411, no. 1, pp. 43-51. https://doi.org/10.1016/j.tca.2003.07.005

APA

Liesebach, J., Lim, M., & Rades, T. (2004). Determination of unfrozen matrix concentrations at low temperatures using stepwise DSC. Thermochimica Acta, 411(1), 43-51. https://doi.org/10.1016/j.tca.2003.07.005

Vancouver

Liesebach J, Lim M, Rades T. Determination of unfrozen matrix concentrations at low temperatures using stepwise DSC. Thermochimica Acta. 2004 Feb 19;411(1):43-51. https://doi.org/10.1016/j.tca.2003.07.005

Author

Liesebach, Jens ; Lim, Miang ; Rades, Thomas. / Determination of unfrozen matrix concentrations at low temperatures using stepwise DSC. In: Thermochimica Acta. 2004 ; Vol. 411, No. 1. pp. 43-51.

Bibtex

@article{d2980a22d59446028fe9883139466f79,
title = "Determination of unfrozen matrix concentrations at low temperatures using stepwise DSC",
abstract = "The aim of the current study was to determine whether stepwise DSC (SW-DSC) is a suitable method for measuring the unfrozen matrix concentration (C g) of binary aqueous solutions at temperatures as low as -50°C. The optimal experimental conditions were determined using water. Reliable heat capacity values were determined at nominal scanning rates between 10 and 100Kmin-1, sample weights between 8 and 15mg, and with the sample completely covering the base of the DSC pan. These conditions were then applied to aqueous solutions of ethylene glycol, glycerol and sodium chloride. The apparent heat is the sum of all heat including latent heat, heat capacity and heat of dilution. The influence of each term on the apparent heat was discussed in detail. The apparent heat values of the frozen samples were then used to calculate the ice fraction in the solution and were expressed as the C g. The calculated Cg values were similar to previously published values. This study showed that SW-DSC can be used to determine the Cg over a wide temperature range using only one single solution. This technique is advantageous for solutes that are not available in large quantities.",
keywords = "Ethylene glycol, Glycerol, Melting curve, Sodium chloride, Stepwise DSC, Unfrozen matrix concentration",
author = "Jens Liesebach and Miang Lim and Thomas Rades",
year = "2004",
month = feb,
day = "19",
doi = "10.1016/j.tca.2003.07.005",
language = "English",
volume = "411",
pages = "43--51",
journal = "Thermochimica Acta",
issn = "0040-6031",
publisher = "Elsevier",
number = "1",

}

RIS

TY - JOUR

T1 - Determination of unfrozen matrix concentrations at low temperatures using stepwise DSC

AU - Liesebach, Jens

AU - Lim, Miang

AU - Rades, Thomas

PY - 2004/2/19

Y1 - 2004/2/19

N2 - The aim of the current study was to determine whether stepwise DSC (SW-DSC) is a suitable method for measuring the unfrozen matrix concentration (C g) of binary aqueous solutions at temperatures as low as -50°C. The optimal experimental conditions were determined using water. Reliable heat capacity values were determined at nominal scanning rates between 10 and 100Kmin-1, sample weights between 8 and 15mg, and with the sample completely covering the base of the DSC pan. These conditions were then applied to aqueous solutions of ethylene glycol, glycerol and sodium chloride. The apparent heat is the sum of all heat including latent heat, heat capacity and heat of dilution. The influence of each term on the apparent heat was discussed in detail. The apparent heat values of the frozen samples were then used to calculate the ice fraction in the solution and were expressed as the C g. The calculated Cg values were similar to previously published values. This study showed that SW-DSC can be used to determine the Cg over a wide temperature range using only one single solution. This technique is advantageous for solutes that are not available in large quantities.

AB - The aim of the current study was to determine whether stepwise DSC (SW-DSC) is a suitable method for measuring the unfrozen matrix concentration (C g) of binary aqueous solutions at temperatures as low as -50°C. The optimal experimental conditions were determined using water. Reliable heat capacity values were determined at nominal scanning rates between 10 and 100Kmin-1, sample weights between 8 and 15mg, and with the sample completely covering the base of the DSC pan. These conditions were then applied to aqueous solutions of ethylene glycol, glycerol and sodium chloride. The apparent heat is the sum of all heat including latent heat, heat capacity and heat of dilution. The influence of each term on the apparent heat was discussed in detail. The apparent heat values of the frozen samples were then used to calculate the ice fraction in the solution and were expressed as the C g. The calculated Cg values were similar to previously published values. This study showed that SW-DSC can be used to determine the Cg over a wide temperature range using only one single solution. This technique is advantageous for solutes that are not available in large quantities.

KW - Ethylene glycol

KW - Glycerol

KW - Melting curve

KW - Sodium chloride

KW - Stepwise DSC

KW - Unfrozen matrix concentration

UR - http://www.scopus.com/inward/record.url?scp=0742289468&partnerID=8YFLogxK

U2 - 10.1016/j.tca.2003.07.005

DO - 10.1016/j.tca.2003.07.005

M3 - Journal article

AN - SCOPUS:0742289468

VL - 411

SP - 43

EP - 51

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

IS - 1

ER -

ID: 299429165