Precipitation and microflotation of egg albumin and hemoglobin in the presence of dioctadecyldimethylammonmin chloride.

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概要

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• Precipitation and microflotation of egg albumin and of hemoglobin was studied as a function of pH in the presence of dioctadecyldimethylammonium chloride (DOAC). The "DOAC concentration-pH" stability domains for both protein solutions (0.05 wt%) exhibited similar boundaries. Efficient separation by precipitation (more than 80% after 24 h) occurs at pH>5.0 for albumin and at pH>6.3 for hemoglobin. The same amount of removal by microflotation required 5 min under otherwise similar conditions. The DOAC concentration for optimal separation of proteins (from 0.05 wt% solutions) is 0.02 wt% at pH 6–8 for albumin and 0.015 wt% at pH 6.5–8 for hemoglobin. It is noteworthy that both proteins can be precipitated and also foam separated even in strongly alkaline media, such as at pH 12, where the usual flocculents (<I>e.g.</I>, aluminum salts) cannot be employed. This work points out the usefulness of infinitely aggregating surfactants as microflotation agents.

• 公益社団法人 日本化学会の論文

著者

• Itoh Kazuo

  Department Of Cardiovascular Surgery Aomori General Hospital

• Shinoda Kozo

  Department of Chemistry Faculty of Engineering Yokohama National University

• Itoh Kazuo

  Department of Chemistry, Faculty of Engineering, Yokohama National University

• Nakayama Haruo

  Department of Applied Chemistry, Faculty of Engineering, Yokohama National University

• Matijevic Egon

  Institute of Colloid and Surface Science and Department of Chemistry, Clarkson College of Technology

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