跳轉至內容

Solubility and thermodynamic function of vanillin in ten different environmentally benign solvents.

Solubility and thermodynamic function of vanillin in ten different environmentally benign solvents.

Food chemistry (2015-03-15)

Faiyaz Shakeel, Nazrul Haq, Nasir A Siddiqui

摘要

The solubility of vanillin in ten different environmentally benign solvents namely water, ethanol, ethylene glycol (EG), ethyl acetate (EA), isopropanol (IPA), propylene glycol (PG), polyethylene glycol-400 (PEG-400), Transcutol, butanol-1 and butanol-2 was measured and correlated at T=(298-318)K. The resulting experimental data were correlated with the modified Apelblat and Van't Hoff models. Both the models showed good correlation of experimental solubility data with calculated ones with root mean square deviations in the range of (0.08-1.55)%. The mole fraction solubility of vanillin was observed highest in PEG-400 (4.29 × 10(-1) at 298 K) followed by Transcutol, EA, butanol-2, ethanol, EG, PG, IPA, butanol-1 and water from T=(298-318)K. The results of thermodynamic function in terms of dissolution enthalpy, Gibbs energy and dissolution entropy showed endothermic, spontaneous and entropy-driven dissolution of vanillin in all environmentally benign solvents.

材料

產品編號

品牌

產品描述

Sigma-Aldrich

乙腈, suitable for HPLC, gradient grade, ≥99.9%

Sigma-Aldrich

纯乙醇, 200 proof, for molecular biology

Sigma-Aldrich

丙酮, ACS reagent, ≥99.5%

Sigma-Aldrich

纯乙醇, 200 proof, ACS reagent, ≥99.5%

Sigma-Aldrich

丙酮, suitable for HPLC, ≥99.9%

Sigma-Aldrich

乙腈, HPLC Plus, ≥99.9%

Sigma-Aldrich

纯乙醇, 200 proof, HPLC/spectrophotometric grade

Sigma-Aldrich

丙酮, HPLC Plus, for HPLC, GC, and residue analysis, ≥99.9%

Sigma-Aldrich

纯乙醇, 200 proof, meets USP testing specifications

Sigma-Aldrich

正丁醇, 99.9%

Sigma-Aldrich

乙腈, ACS reagent, ≥99.5%

Sigma-Aldrich

丙酮, Laboratory Reagent, ≥99.5%

Sigma-Aldrich

纯乙醇, 190 proof, for molecular biology

Sigma-Aldrich

乙腈, for HPLC, for UV, ≥99.9% (GC)

Sigma-Aldrich

正丁醇, ACS reagent, ≥99.4%

Sigma-Aldrich

乙腈, suitable for HPLC, gradient grade, ≥99.9%

Sigma-Aldrich

正丁醇, suitable for HPLC, ≥99.7%

Sigma-Aldrich

乙腈, anhydrous, 99.8%

Sigma-Aldrich

丙酮, suitable for HPLC, ≥99.8%

Sigma-Aldrich

丙酮, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.5% (GC)

Sigma-Aldrich

丙二醇, ≥99.5% (GC), FCC, FG

Sigma-Aldrich

酒精, ACS reagent, prima fine spirit, without additive, F15 o¹

Sigma-Aldrich

2-丁醇, ReagentPlus^®, ≥99%

Sigma-Aldrich

酒精, purum, absolute ethanol, denaturated with 4.8% isopropanol, A15 IPA¹, ≥99.8% (based on denaturant-free substance)

Sigma-Aldrich

纯乙醇, 200 proof, anhydrous, ≥99.5%

Sigma-Aldrich

乙腈, suitable for HPLC-GC, ≥99.8% (GC)

Sigma-Aldrich

丙酮, ACS reagent, ≥99.5%

Sigma-Aldrich

酒精, BioUltra, for molecular biology, ≥99.8%, (absolute alcohol, without additive, A15 o¹)

Sigma-Aldrich

正丁醇, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.5% (GC)

Sigma-Aldrich

1,3-丙二醇, 98%