Feasibility study of constructed L-ascorbic acid/montmorillonite composite for applications
Date Issued
2007
Date
2007
Author(s)
Chang, Chi-Yu
DOI
zh-TW
Abstract
This study tended to construct new L-ascorbic acid (LAA) composites in low toxicity and high stability for feasible application. Although literature revealed that sodium thiosulphate could stabilize the activity of LAA, our finding showed that the significant toxicity was provoked by the introduction of sodium thiosulphate. Thus, a safe-and-non-toxic material montmorillonite (MMT) was thus used to attenuate this toxicity and to sustain the stability of composites with economic feasibility for practical use. As the proton released from LAA promoted the increases of interlayer spacing of clay layers in MMT, the formation of stable-and-non-toxic LAA composites was resulted as indicated from toxicity assessment (i.e., yeast model) and stability tests. The composites of 【MMT + 10 % LAA + 0.90 % Na2S2O3】 and 【MMT + 5 % LAA + 1.35 % Na2S2O3】were found to be feasible for further applications.
Subjects
左旋維他命C
蒙脫石
硫代硫酸鈉
L-ascorbic acid (LAA)
montmorillonite
Sodium thiosulfate
Type
thesis
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