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A RAPID METHOD OF TOTAL LIPID EXTRACTION AND PURIFICATION

Why this mattered

Bligh and Dyer mattered because they turned lipid extraction from a slow, sample-specific craft into a fast, reproducible bench procedure. The key shift was not merely using chloroform and methanol, but defining a solvent-ratio sequence in which wet tissue water became part of an initially miscible extraction system, followed by controlled phase separation. That made it practical to recover lipids directly from moist biological material without drying or harsh manipulations that could alter labile lipids. For a field in which lipid measurements were often limited by extraction losses, degradation, and poor comparability between laboratories, the method supplied a common operational standard.

The paper also changed what kinds of lipid biology could be studied at scale. Because the procedure was rapid, efficient, and adaptable beyond fish muscle, it enabled larger comparative studies of lipid composition across tissues, organisms, storage conditions, diets, and disease states. Later work in membrane biology, nutrition, food science, marine biochemistry, and clinical lipid analysis depended on reliable total-lipid extracts as the starting material for chromatography, mass spectrometry, fatty-acid profiling, and lipid-class quantification. In that sense, Bligh-Dyer extraction became part of the hidden infrastructure of modern lipidomics: not a theory of lipids, but a practical method that made precise lipid measurement routine enough for new theories and discoveries to accumulate.

Abstract

Lipid decomposition studies in frozen fish have led to the development of a simple and rapid method for the extraction and purification of lipids from biological materials. The entire procedure can be carried out in approximately 10 minutes; it is efficient, reproducible, and free from deleterious manipulations. The wet tissue is homogenized with a mixture of chloroform and methanol in such proportions that a miscible system is formed with the water in the tissue. Dilution with chloroform and water separates the homogenate into two layers, the chloroform layer containing all the lipids and the methanolic layer containing all the non-lipids. A purified lipid extract is obtained merely by isolating the chloroform layer. The method has been applied to fish muscle and may easily be adapted to use with other tissues.

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