Among the HDL quantitation methods listed, which is named as the Gomori procedure?

• A. Gomori procedure
• B. Homogeneous
• C. Column chromatography
• D. Agarose gel electrophoresis

Answer: (A)

The main idea is to measure HDL by removing the other lipoproteins first and then quantifying the cholesterol that remains in the HDL fraction. The Gomori procedure does this by using a precipitation step: a phosphotungstate-magnesium reagent forms a precipitate with the Apo B–containing lipoproteins (LDL and VLDL), so these non-HDL lipoproteins are pulled out of solution. The HDL stays dissolved in the supernatant, and its cholesterol is then measured enzymatically. This precipitation-based approach distinguishes it from homogeneous direct HDL tests that don’t require a separation step, and from column chromatography or agarose gel electrophoresis, which are separation techniques rather than straightforward precipitation methods for HDL quantitation.